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    Wyświetlanie 1-93 z 93
    Tytuł:
    Research on intelligent diagnosis method for large-scale ship engine fault in non-deterministic environment
    Autorzy:
    Feng, D.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/258452.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    non-determinism
    large-scale ship engine
    fault intelligent diagnosis
    Opis:
    Aiming at the problem of inaccurate and time-consuming of the fault diagnosis method for large-scale ship engine, an intelligent diagnosis method for large-scale ship engine fault in non-deterministic environment based on neural network is proposed. First, the possible fault of the engine was analyzed, and the downtime fault of large-scale ship engine and the main fault mode were identified. On this basis, the fault diagnosis model for large-scale ship engine based on neural network is established, and the intelligent diagnosis of engine fault is completed. The experiment proved that the proposed method has high diagnostic accuracy, engine fault diagnosis takes only about 3s, with a higher use value.
    Źródło:
    Polish Maritime Research; 2017, S 3; 200-206
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of location of Top Dead Centre and compression ratio value on the basis of ship engine indicator diagram
    Autorzy:
    Polanowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/258924.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Top Dead Centre
    compression ratio
    ship engine indicator diagram
    Opis:
    In the polytropic model of compression process, exponent of polytropic compression curve was replaced with a power polynomial in which the piston travel was used as its argument. It was shown that 3rd order polynomial is optimum one. In the model were taken into account the following: design parameters of cylinder, influence of cylinder wear and gas blow-by on compression process, error in determining the piston’s Top Dead Centre (TDC) location, measurement error due to indicator diagram’s truncation. The presented solution of the non-linear model is based on its partial linearization, use of the least squares method as well as on application of the optimum determination methods known in the theory of experiment. The model makes it possible to determine TDC location on indicator diagram dealing with combustion, determination of total compresion ratio, pressure value of indicator diagram truncation, as well as determination of maximum values of compression pressure on the diagrams in which self-ignition occurs before reaching the TDC.
    Źródło:
    Polish Maritime Research; 2008, 2; 59-64
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of catalitic reactors usefulness to reduce pollution generated by piston combustion engines with regard to ship main engines
    Autorzy:
    Zielińska, E.
    Girtler, J.
    Lejda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/260376.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship engine
    catalytic reactor
    catalytic reactor efficiency
    harmful compounds
    Opis:
    The article presents results which indicate that the use of catalytic reactors to reduce emissions of harmful compunds contained in the exhaust gas is important in the operation of vehicle motors operation. Efforts of the shipbuilding industry to reduce the toxicity of exhaust gas emitted by the main engines have been indicated and pointed to the desirability of the use of these catalysts in maritime transport. It has been pointed out that studies of the harmful substances in exhaust gases performer at vehicle inspection stations have an impact on increasing the safety of drivers and other road users and contribute to preserving the natural environment by reducing the danger coming from cars operating on Polish roads. An opinion has been expressed that the most serious threats to the environment are emitted by car transport exhaust fumes, which are characterized by significant emission of toxic compounds excreted into the atmosphere from tailpipe emissions. It has been demonstrated that a fully functioning catalytic reactor, operating in a steady state at appropriate temperatures and the composition of the mixture close to stoichiometric ratio, can reduce emissions of carbon monoxide, hydrocarbons and nitrogen oxides by more than 90%. Also, an assessment has been presented reporting the efficiency of catalytic reactors of spark ignition engines operating in a test vehicle inspection station. The results of research in the evaluation of their performance were correlated with their operation waveforms. Such an approach is justified by the fact that during the operation of each vehicle the wear of its assemblies and components is different – including the catalytic reactor. The catalytic layer undergoes aging so that there are changes in the structure and chemical composition of the catalyst bed, while the overlapping of layers of different chemical compounds that block access to the active layer of the reactor. An opinion has also been expressed that it would be advisable to take steps to use research results presented in this article for research of catalytic reactors similar use in diagnostic systems of marine combustion engines, especially the main ones, which exhaust emissions are incomparably greater than in the case of car engines.
    Źródło:
    Polish Maritime Research; 2017, 1; 81-87
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Causality in models of thermal processes in ship engine rooms with the use of Bond Graph (BG) method
    Autorzy:
    Cichy, M.
    Kneba, Z.
    Kropiwnicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258502.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Bond Graph (BG) method
    causality
    ship engine room
    energy system modeling
    Opis:
    With a single approach to modeling elements of different physical nature, the method of Bond Graph (BG) is particularly well suited for modeling energy systems consisting of mechanical, thermal, electrical and hydraulic elements that operate in the power system engine room. The paper refers to the earlier presented [2] new concept of thermal process modeling using the BG method. The authors own suggestions for determining causality in models of thermal processes created by the said concept were given. The analysis of causality makes it possible to demonstrate the model conflicts that prevent the placement of state equations which allows for the direct conduct of simulation experiments. Attention has been drawn to the link between the energy systems models of thermal processes with models of elements of different physical nature. Two examples of determining causality in models of complex energy systems of thermal elements have been presented. The firs relates to the electrical system associated with the process of heat exchange. The second is a model of the mechanical system associated with the thermodynamic process.
    Źródło:
    Polish Maritime Research; 2017, S 1; 32-37
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An attempt at applying machine learning in diagnosing marine ship engine turbochargers
    Autorzy:
    Adamkiewicz, Andrzej
    Nikończuk, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2200936.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    machine learning
    compressor diagnosis
    marine ship engine
    operational decision
    neural
    network
    Opis:
    The article presents a diagnosis of turbochargers in the supercharging systems of marine engines in terms of maintenance decisions. The efficiency of turbocharger rotating machines was defined. The operating parameters of turbocharging systems used to monitor the correct operation and diagnose turbochargers were identified. A parametric diagnostic test was performed. Relationships between parameters for use in machine learning were selected. Their credibility was confirmed by the results of the parametric test of the turbocharger system and the main engine, verified by the coefficient of determination. A particularly good fit of the describing functions was confirmed. As determinants of the technical condition of a turbocharger, the relationship between the rotational speed of the engine shaft, the turbocharger rotor assembly and the charging air pressure was assumed. In the process of machine learning, relationships were created between the rotational speed of the engine shaft and the boost pressure, and the indicator of the need for maintenance. The accuracy of the maintenance decisions was confirmed by trends in changes in the efficiency of compressors.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 4; 795--804
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of service failures of cylinder valves of ship piston combustion engines
    Autorzy:
    Korczewski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260423.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    technical diagnostics
    ship diesel engine
    valve timing
    Opis:
    This paper presents selected diagnostic problems of charge exchange system of ship piston combustion engines. Theoretical background of wear process of cylinder valves was highlighted in the aspect of identification and sources of known and identifiable states of unserviceability. The presented results of endoscopic examinations concern failures of cylinder valves of the engines installed on Polish Navy ships.
    Źródło:
    Polish Maritime Research; 2007, 2; 19-26
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On possible supplying ship diesel engines with alternative fuels (mixtures of diesel oils and vegetable oils or their esters). Preliminary report
    Autorzy:
    Krzyżanowski, J.
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/259181.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship diesel engine
    alternative fuel oils
    ecology
    Opis:
    The paper presents introduction to the research on possible supplying ship diesel engines with mixtures of diesel oils and vegetable oils or their esters with accounting for ecological aspects, i.e. exhaust gas purity. Characteristics of vegetable oils and their esters are compared with those of diesel oils; some consequenŹces of their application to diesel engines, mainly for their working process and exhaust gas content, are indicated. Also, influence of combusting their mixtures with diesel oils are discussed in the same context. Scope of the planned research project is shortly presented.
    Źródło:
    Polish Maritime Research; 2004, 4; 28-30
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Węzły funkcjonalne okrętowego silnika spalinowego wolnoobrotowego wodzikowego jako źródła drgań
    Functional hubs marine two stroke diesel engine as a source of vibration
    Autorzy:
    Łosiewicz, Z.
    Banaszek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/314840.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    okrętowy silnik spalinowy
    wodzik
    źródło drgań
    ship engine
    slider
    source of vibration
    Opis:
    W artykule omówione zostały założenia wstępne identyfikacji źródeł drgań w węzłach funkcjonalnych silnika wolnoobrotowego wodzikowego.
    Paper discussed the initial assumptions were the identification of sources of vibration in the functional hubs of marine two stroke diesel engine.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 986-988
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for evaluating theoretical and real operation of diesel engines in energy conversion formulation taking into account their operating indices
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260600.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    operation
    energy
    diesel engine
    ship’s main engine
    Opis:
    The article proposes valuating the operation of an arbitrary diesel engine, based on the sample case of a ship’s main engine in which energy conversion processes take place in a given time. The above operation is understood as the energy transfer to the screw propeller in the given time in which the energy conversion into work and/or heat and its further transmission take place. The here proposed method for evaluating the operation of the main engines installed in marine power plants consists in comparing the operation of these engines to a physical quantity the measuring unit of which is the joule-second (joule×second). A new term is introduced which bears the name of the theoretical engine operation and is the standard (ideal) operation which can be compared to the operation of real engines revealing different levels of wear. It was shown that the calculations of the theoretical operation defined in the above way cannot make direct use of commonly known theoretical Diesel and Sabathe cycles. Instead they should use the cycles modified by heat abstraction taking place in accordance with the isobaric, or isothermal process. Other new terms introduced in the article are: the degree of excellence of energy conversion to work, considered as the measure of excellence of engine operation, and the degree of engine operation dissipation, being the measure of its real operation. It is shown that if in time t of engine operation the case takes place that: Li = idem and Le = idem, then the engine operation dissipation is equal to its mechanical efficiency.
    Źródło:
    Polish Maritime Research; 2011, 3; 31-36
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model dwukryterialnej optymalizacji harmonogramu prac w siłowni okrętowej jako zadanie pakowania
    A model of operation tasks schedule in ship Engine Room
    Autorzy:
    Kamiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/156841.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    optymalizacja
    harmonogramowanie
    siłownia okrętowa
    zadanie pakowania
    optimization
    scheduling
    ship engine room
    theory of packing
    Opis:
    W pracy przedstawiono problem planowania zadań eksploatacyjnych w Siłowni Okrętowej z wykorzystaniem teorii pakowania. W podejściu tym maksymalizowane są dwa kryteria: ważności zadań z eksploatacyjnego punktu widzenia oraz najlepszego wykorzystania dostępnego czasu. Określona została postać funkcji celu oraz podstawowe ograniczenia, z jakimi spotyka się starszy mechanik podczas harmonogramowania prac w siłowni okrętowej. Do przeszukiwania przestrzeni rozwiązań zastosowano zmodyfikowaną algorytm przeglądu z nawrotami (Horowitz'a).
    The problem of operation tasks scheduling in Engine Room used the theory of packing has been presented in this paper. Two criterions is maximized in this approach: importance of the tasks and the best use of accessible time. The objective function, decision variables and fundamental constraints what meet chief engineer were defined. To searching of solutions space was used the modified Horowitz algorithm.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 8, 8; 25-28
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modal analysis of the structure for crankshaft in the ships engine for the two cases of mass balancer
    Analiza numeryczna drgań własnych konstrukcji wału średnioobrotowego silnika okrętowego dla dwóch sposobów rozmieszczenia mas wyrównoważających
    Autorzy:
    Roszak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/134126.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    numerical analysis
    crankshaft
    ship's engine
    wał korbowy silnika okrętowego
    obliczenia numeryczne
    analiza drgań własnych
    Opis:
    The following paper presents the modeling and modal and rotor dynamic analysis performed for the engine crankshaft Deutz V12M540 for the two cases of mass balancer. The scope of work includes the following elements: modeling elements on the basis of technical documentation, prepare discrete models for numerical analysis, crankshaht with flywheel modal analysis for crankshaht with flywheel, dynamic analysis for the initial conditions. The analysis was prepared for two cases of mass balancer.
    Praca przedstawia numeryczną analizę drgań własnych wału korbowego silnika okrętowego Deutz12M540 dla dwóch konfiguracji mas wyrównoważających wynikających z konstrukcji wału. Praca zawiera: proces modelowania wału korbowego na podstawie dostarczonej dokumentacji, procedurę przygotowania modeli dyskretnych, definicję warunków początkowych, obliczenia i analizę wyników obliczeń. Obliczenia przeprowadzono dla pełnej konfiguracji mas wyrównoważających i ograniczonej wg. dostarczonej dokumentacji.
    Źródło:
    Combustion Engines; 2015, 54, 3; 487-490
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of maximum vibration after the addition of the gorger construction to evaluate the side deck girder construction planning in the ship engine room
    Autorzy:
    Sugeng, S.
    Utomo, B.
    Said, S. D.
    Yusim, A. K.
    Windyandari, A.
    Khristyson, S. F.
    Afrizal, L.
    Jatmiko, A. B.
    Sanjiwo, Z. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172504.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    ship engine room
    side deck girder construction
    maximum vibration
    gorger construction, vibration
    ship vibration measurement
    side deck girder
    girder
    Opis:
    The greatest vibration occurs in the engine room, but all other parts of the ship also experience vibrations because it is propagating. Even though there are methods to reduce these vibrations such as engine beds, they can only reduce the damaging effects and cannot completely eliminate the vibrations themselves. The method used in this research is to compare the measurement of good vibrations in the conditions before the addition of construction and after the addition of construction for later comparison with numerical calculation data. The purpose of this study is to obtain the maximum vibration value in the conditions after the addition of the gorger construction before the addition of the side deck girder construction as a means of evaluating the side deck girder construction planning in the ship engine room ship 2000 DWT. The result consideration of adding construction becomes one or the alternative in providing reinforcement so that it can reduce the vibration that occurs. From analyze results after addition of a sized T profile FB 180 x 8 mm FP 75 x 10 mm, which ranges from 28 - 29 m/s2 for the x-axis vibration value, while for vibrations on the y-axis the maximum is 10-11 m/s2, and on the maximum z-axis. at 20-21 m/s2, this analyze vibration is based on the time between 0 - 15 seconds or per 15 second interval, able to reduce percentage of vibration in the ship engine room area is 34.91%.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 2; 337--340
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of nondimensional arguments in dimensional functions of ship propulsion engine operation
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246528.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship propulsion engine operation dimensional analysis
    dimensionless arguments in dimensional functions
    Opis:
    The following article describes different ways for determining dimensionless arguments in dimensional functions of ship propulsion engine operation. Dimensional space has also been characterized in relation to properties it possesses. An attention has been paid to the fact that it creates Abelian group, where involution fulfils multiplication axiom by scalar, and positive numbers that belong to dimensional space create dimensionless subspace. The conception of dimensional dependence has also been explained. There are also described conditions, which should be fulfilled by dimensional quantities to be dimensionally independent. Fundamental theorems of dimensional analysis have also been characterized. There is also given the definition of dimensional function of ship propulsion engine operation concerning values and dimensional arguments. It has been explained what requirements are to be fulfilled. One can also learn what limitations are imposed on dimensional function of ship propulsion engine operation concerning dimensional homogeneity and invariance. The ways of dimensional function transformation into a numerical one have been described. In addition, some conditions have been given which must be applied at given method of dimensional function transformation. An attention has been paid to the fact that dimensionless arguments are similarity invariant as a result of transformation by the similarity method of mathematical model of ship propulsion engine operation. In this study, the ship propulsion engine performance is expressed by product of Joule and second interpreted as transfer of energy in the form of work. Identification of ship propulsion engine operation by dimensional analysis performed in terms of its usefulness for diagnosis of ship propulsion engines. The basic problem of marine diesel exploitation is the monitoring of its technical condition. Diagnosis of marine diesel propulsion increases the safety of the ship and thus protects the marine environment against pollution.
    Źródło:
    Journal of KONES; 2015, 22, 2; 185-190
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A simulation model of energy distribution in ship combustion engine
    Autorzy:
    Nguyen, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/259168.pdf
    Data publikacji:
    2005
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    computer simulation
    ship diesel engine
    dynamic processes
    energy balance and distribution
    Opis:
    In the paper a model of energy flow and distribution in ship diesel engine cylinder was presented. This is a model of discrete parameters, being a continuation of the author s research on simulation of energy processing within ship main propulsion engine [2,3]. The model in question makes it possible to calculate energy flow values delivered and transferred during every working cycle of the engine cylinder. Results of application of the model for 6ZA40S Sulzer engine installed on B672 ship were also attached. The results were compared with results of test-stand measurements of the engine, performed at different load levels.
    Źródło:
    Polish Maritime Research; 2005, 1; 22-26
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectrofluorimetric characteristics of used lubricating oil
    Spektrofluorymetryczna charakterystyka zużytego oleju smarnego
    Autorzy:
    Baszanowska, E.
    Otremba, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/328239.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    fluorescence
    excitation-emission spectra of oil
    lubricate oil
    ship engine
    fluorescencja
    zupełne widmo fluorescencji
    olej smarny
    silnik okrętowy
    Opis:
    Deterioration of lubricate oil in combustion engines enforces measurements of parameters essential for proper operation of define driving system or to certain engine malfunctions indicate. Since the fluorescence phenomenon is known for oil excited by ultraviolet light - the question arises whether fluorescence spectra evolving with the time of exploitation of oil in the engine. In this paper the introductory studies of excitation-emission spectra (EEMs) for chosen lubricate oil are described. Both fresh and used oil (after 593 h of work in a ship engine), was used to measure EEMs. As a result of comparison of EEMs for both fresh and used lubricate oils more significant transformations in fluorescence spectra of oil caused by their exploitation are indicated. Obtained results allow to predict that spectrofluorimetry method could supplement present methods of used lubricating oil testing.
    Pogarszanie się właściwości oleju smarnego w silniku spalinowym skutkuje koniecznością monitorowania jego eksploatacyjnych parametrów. Z racji wykazywania przez oleje fluorescencji w świetle ultrafioletowym - powstaje pytanie, czy widma fluorescencji ewoluują wraz z czasem przebywania oleju w obiegu smarnym silnika. W artykule opisane są wstępne analizy zmian zupełnych widm fluorescencji (EEMs) dla różnych stężeń wybranego oleju smarnego. Do pomiaru EEMs oleju użyto dwóch form oleju – świeżego i przepracowanego w silniku okrętowym w czasie 593 h. W następstwie porównania widm uzyskanych dla świeżego i przepracowanego oleju wskazano na zachodzące najbardziej znaczące zmiany we fluorescencji oleju smarnego. Uzyskane wyniki pozwalają sądzić, że spektrofluorymetria mogłaby uzupełnić obecne metody testowania przepracowanego oleju.
    Źródło:
    Diagnostyka; 2014, 15, 4; 65-71
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identifying the issue of reducing the emission of harmful compounds in the exhaust gas from marine main engines and description of the emission process of these compounds in probabilistic approach
    Autorzy:
    Łosiewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/258884.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship’s main engine
    semi-Markov process
    Diesel engine
    harmful substance
    Opis:
    The article discusses the results of actions performed by marine engine manufacturers towards the reduction of emission of harmful substances in the exhaust gas from these engines. The discussion is limited to main engines produced by MAN B&W. A model is proposed to describe the process of emission of harmful substances from Diesel engines based on the semi-Markov process, discrete in states and continuous in the operating time. The states of this process are: engine ability state (s1) and engine inability state (s2). A method to calculate probabilities P1 and P2 of the appearance of states s1 and s2 is proposed. State s1 is interpreted as corresponding to the inequality ekek(dop), where ek represents the mass of harmful substances emitted by the engine during its operation and ek(dop) is the maximum mass of emission of these substances permitted by relevant regulations.
    Źródło:
    Polish Maritime Research; 2017, 2; 89-95
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The correct selection of diagnostic parameters of marine diesel engine and their minimization of as a necessary action in the formation of diagnostic algorithm
    Autorzy:
    Witkowski, K
    Powiązania:
    https://bibliotekanauki.pl/articles/247369.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship diesel engine
    diagnostic parameters
    diagnostics programs
    experimental data
    Fault Isolation System
    Opis:
    This article describes the methodology of creating algorithms and diagnostic programs. Still in the construction of such algorithms and diagnostic creating programs mostly is used classical approach, the methodological basis can be reduced to the several basic tasks. One of them is the proper selection and minimization of diagnostic parameters. The article shows the importance of proper selection and minimization of diagnostic parameters on the example of the diagnostics of the injection system of a marine diesel engine. It was indicated to practical usefulness for this purpose calculated the values sensitivity of a given parameter. The stronger the diagnostic parameter responds to a change in the structural parameter, the greater its diagnostic sensitivity is and thus the early development of a given fault can be detected based on deviation analysis of this parameter from its reference value. Based on experimental data, FIS (Fault Isolation System) matrix was built after selecting and minimizing diagnostic parameters. Triple-valued evaluation of residues (–1, 0, +1) was used. The research was carried out on a real object – a four-stroke, mediumspeed marine engine from Sulzer. The impact of selected fault in the injection system on the diagnostic parameters was researched and a FIS (Fault Isolation System) matrix was built on this basis.
    Źródło:
    Journal of KONES; 2017, 24, 2; 287-292
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on influence of condition elements the supercharger system on the parameters of the marine diesel engine
    Autorzy:
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/244429.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship diesel engine
    turbocharger system
    active experiment
    air filter
    compressor
    air cooler
    Opis:
    This paper presents the issues related to the impact of the technical condition elements of the turbocharger system on the parameters of marine diesel engine. Turbocharger system, in addition to the injection system has a significant impact on the quality of the working process, the economics and reliability of the engine. Contamination of elements of the turbocharger system are the most common faults (24.7% of all damage to marine engines). Contamination the following relates to elements: air filters, compressor, air cooler, scavenging system elements and turbine. The detailed data follows that the contamination are usually in: flow channels supercharger – 56%, turbine flow channels – 22%, air cooler – 11%, air filter – 6%, scavenging system elements – 4%, other elements – 1%. The technical condition influence of air filter, compressor and air cooler was analyzed. The analysis was supported by the results of their own research, carried out in the laboratory on the marine diesel engine, four– stroke 3AL25/30 SULZER, supercharged turbocharger VTR160N Brown Boveri. The research was performed in the form of an active experiment to simulate contamination of particular elements of the turbocharging system. Technical condition change of the air filter, the air compressor and the air cooler have been investigated.
    Źródło:
    Journal of KONES; 2013, 20, 1; 375-380
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The NOx emission estimation by the artificial neural network: the results
    Autorzy:
    Kowalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/244752.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    emission
    NOx
    nitric oxides
    ANN
    artificial neural network
    perception
    ship diesel engine
    Opis:
    The paper presents the preliminary investigations of nitric oxides (NOx) estimation from marine two-stroke engines. The Annex VI to Marpol Convention enforce to ship - owners necessity of periodical direct measurements of the NOx emission from the ship engines. It is very expensive procedure but with a low accuracy. Presented investigations show the possibility of estimation the NOx emission without direct measurements but using the artificial neural network (ANN). The paper presents chosen structures of ANN's usable to NOx emission estimation, the laboratory investigations and effects of estimation NOx emission. The paper reports the effects of investigations during different points of load the engine, with constant and changeable air/fuel equivalence ratio. The detailed results of measurement and calculation of NOx concentration in the exhaust gases of marine two-stroke diesel engine were presented. The results show that the multilayer perception neural network (MLP) is sufficient to NOx emission estimation during onboard exploitation. The MLP network with 15 neurons in the hidden layer has best accuracy for data sets collected during running the engine with speed equal 200 rpm and constant air/fuel equivalence ratio and for both considered speeds of the engine with changeable air/fuel equivalence ratio.
    Źródło:
    Journal of KONES; 2008, 15, 4; 269-276
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The thermal state modelling of cylinder liner of marine two-stroke combustion engine
    Autorzy:
    Kowalski, J.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259669.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    silniki okrętowe
    elementanre metody równowagi
    stan cieplny
    tuleja cylindrowa
    ship engine
    elementary balance method
    thermal state
    cylinder liner
    Opis:
    This paper presents a two-dimensional model of heat flow through structural elements of cylinder of two-stroke cross-head engine of longitudinal scavenging, obtained with the use of the elementary balance method. Special attention was paid to the modelling of temperature distribution within engine cylinder liner of "wet" construction. For modelling the unsteady heat flow multi-dimensional equations with Dirichlet - Fourier boundary conditions, were used. For the Fourier boundary conditions in the engine cylinder space local values of convective and radiant heat-transfer coefficients were applied. For calculations the KM3R method of solving differential equations, based on the elementary balance method, was used. Modelling results have been presented in the form of the temperature field of engine cylinder structural elements in function of the changeable angle of crankshaft position.
    Źródło:
    Polish Maritime Research; 2006, 2; 15-20
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The NOx emission estimation by the artificial neural network: the analyze
    Autorzy:
    Kowalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/244207.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    emission
    NOx
    nitric oxides
    ANN
    artificial neural network
    perceptron
    ship diesel engine
    Opis:
    The paper presents the preliminary investigations of nitric oxides (NOx) estimation from marine two-stroke engines. The Annex VI to Marpol Convention enforce to ship-owners necessity of periodical direct measurements of the NOx emission from the ship engines. It is very expensive procedure but with a low accuracy. Presented investigations show the possibility of estimation the NOx emission without direct measurements but using the artificial neural network (ANN). The paper presents method of choice the input data influenced on NOx emission and configuration of ANN and effects of calculations. The input data poses 15 parameters of engine working, influencing on NOx emission. The output data, necessary to learning the network, were NOx concentration in engine exhaust gases. We take into account two types of ANN; the 3-layer perceptron (MLP) with number of neurons in the hidden layer from 10 to 20 and the radial basis function neural network (RBF) with number of neurons in the hidden layer from 10 to 80. The input, validation and verification data was obtained from laboratory tests. After procedure of network configuration, the chosen ANN was learned by back propagation method. During this operation the weights of neurons were changed to minimize the root mean square error. We obtained ANN's, which allow us to estimate the NOx emission from laboratory engine with accuracy, comparable with Annex VI regulations.
    Źródło:
    Journal of KONES; 2008, 15, 2; 225-232
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on influence of selected control parameters of the injection system marine diesel engine on its exhaust gas toxicity
    Autorzy:
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/246698.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship diesel engine
    injection system
    heavy fuel oil
    control parameters
    exhaust gas toxicity
    Opis:
    This paper devoted to pollution of the atmosphere due marine diesel engines in operation. In the paper presented are results of the investigations carried out in the Gdynia Maritime Academy laboratory with the use of a ship diesel engine, one-cylinder, two-stroke, crosshead of longitudinal scavenging, which was loaded by means of the water brake. This diesel engine combusting heavy fuel oil IF 40. The test-involved effect of two selected control parameters of fuel injection system ship diesel engine: fuel injection pressure and injection advance angle. Both selected control parameters were changed during the experiment separately, each of them three times. And so: changing the fuel injection pressure - for three selected values: 18, 22 and 26 MPa; changing the fuel injection advance angle - for three selected values: -10 centigrade, -13 centigrade and -16 centigrade before the piston's top dead centre (BTDC). The measurements were performed within the wide range of engine load at the permanent rotational speed of 220 rpm. For each of the above selected values six measurements were performed at the following engine loads: 25%, 40%, 50%, 60%, 70% and 80% nominal loads. Control parameters to change the injection pump and injector engine, during operation of the engine, by means of a supplementary-scaled instrumentation of the injector and injection pump. Owing to this is was not necessary to stop the engine before each successive test cycle. This way of realization of the measurements guaranteed running them in steady conditions. The elimination of influence of possible disturbances witch could arise from multiple starting and stopping the engine improved accuracy and reliability of the obtained results.
    Źródło:
    Journal of KONES; 2012, 19, 2; 551-556
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Limiting distribution of the three-state semi-Markov model of technical state transitions of ship power plant machines and its applicability in operational decision-making
    Autorzy:
    Girtler, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/258958.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    decision
    probability
    ship power plant machine
    semi-Markov process
    ship internal combustion engine
    Opis:
    The article presents the three-state semi-Markov model of the process {W(t): t > 0} of state transitions of a ship power plant machine, with the following interpretation of these states: s1 – state of full serviceability, s2 – state of partial serviceability, and s3 – state of unserviceability. These states are precisely defined for the ship main engine (ME). A hypothesis is proposed which explains the possibility of application of this model to examine models of real state transitions of ship power plant machines. Empirical data concerning ME were used for calculating limiting probabilities for the process {W(t): t > 0}. The applicability of these probabilities in decision making with the assistance of the Bayesian statistical theory is demonstrated. The probabilities were calculated using a procedure included in the computational software MATHEMATICA, taking into consideration the fact that the random variables representing state transition times of the process {W(t): t > 0} have gamma distributions. The usefulness of the Bayesian statistical theory in operational decision-making concerning ship power plants is shown using a decision dendrite which maps ME states and consequences of particular decisions, thus making it possible to choose between the following two decisions: d1 – first perform a relevant preventive service of the engine to restore its state and then perform the commissioned task within the time limit determined by the customer, and d2 – omit the preventive service and start performing the commissioned task.
    Źródło:
    Polish Maritime Research; 2020, 2; 136-144
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Looking for diagnostics parameters of bearings of the gas turbine engine LM 2500 on the basis of mechanical contaminations in the lubricating oil
    Poszukiwanie parametrów diagnostycznych łożysk silników LM 2500 na podstawie badań zanieczyszczeń mechanicznych w oleju smarowym
    Autorzy:
    Mironiuk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/375575.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    silnik LM 2500
    silnik okrętowy
    silnik turbinowy
    łożysko
    diagnostyka
    olej smarowy
    XRF
    fluorescencja radioizotopowa
    LM 2500 engine
    turbine engine
    ship engine
    bearing
    diagnostics
    lubricating oil
    radioisotope fluorescence
    Opis:
    While operation a gas turbine engine more modest methods of research are brought into effect. But one of the basic methods to estimate the technical condition of gas turbine engines bearing is oil analysis. To estimate the technical condition of gas turbine engines bearing systems on the basis of oil research on, an x-ray method of radioisotope fluorescence was used. This method has been also satisfactorily used in aircraft engine diagnosis. This paper presents the method of diagnosis bearings of marine gas turbines on the basis of studies of mechanical contamination in oil. Results of mechanical contamination research in oil vs time of engine work are presented. On the basis of experiments results the analytical function that makes calculating the future value of the process possible was chosen.
    W eksploatacji okrętowych silników turbinowych powszechnie stosowane są coraz nowsze metody badań diagnostycznych. Jednak jedną z podstawowych metod nadzoru stanu technicznego silników są analizy olejowe. W badaniach diagnostycznych silników turbinowych na podstawie zanieczyszczeń metalicznych w oleju zastosowano, wcześniej wdrożoną w lotnictwie wojskowym, metodę rentgenowskiej fluorescencji radioizotopowej XRF. Metoda ta stanowi użyteczne narzędzie w ocenie stanu technicznego układów mechanicznych silnika. W referacie przedstawiono krótki opis metodyki badań diagnostycznych okrętowych turbinowych silników spalinowych. Do badań identyfikacji zanieczyszczeń mechanicznych w oleju smarowym wykorzystano spektrometr fluorescencyjny ZBZ 93 działający w oparciu o fluorescencję rentgenowską XRF. W artykule zaprezentowano wyniki badań zanieczyszczeń oleju pierwiastkami Fe i Cu, jako funkcje czasu pracy silników turbinowych. Na podstawie otrzymanych wyników badań eksperymentalnych przedstawiono linie trendu wartości zmian tych parametrów w czasie oraz zaprezentowano, opracowany na podstawie badań oleju, parametr diagnostyczny łożysk silnika.
    Źródło:
    Transport Problems; 2009, T. 4, z. 3, cz.1; 89-95
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zbiory parametrów diagnostycznych do identyfikacji stanów technicznych okrętowego tłokowego silnika spalinowego
    Set of diagnostic parameters to identify technical states : book marine diesel engine
    Autorzy:
    Łosiewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/311867.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    okrętowy tłokowy silnik spalinowy
    silnik okrętowy
    parametry diagnostyczne
    ship piston combustion engine
    motor ship
    diagnostic parameters
    Opis:
    W artykule omówione zostały zbiory parametrów diagnostycznych do identyfikacji stanów technicznych okrętowego tłokowego silnika spalinowego jako podstawy w tworzeniu modeli systemów diagnostycznych silników okrętowych.
    Paper discussed the set of diagnostic parameters to identify the technical condition of marine diesel engine as a basis for creating model of marine engine diagnostic system.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 983-985
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The matter of decision-making control over operation processes of marine power plant systems with the use of their models in the form of semi-Markov decision-making processes
    Autorzy:
    Girtler, Jerzy
    Rudnicki, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1551829.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    semi-Markov model
    ship main engine
    operation process
    stochastic process
    operational state
    technical state
    marine power plant equipment
    Opis:
    The article presents the possibility to control the real operation process of an arbitrary device installed in the marine power plant based on the four-state semi-Markov process, being the model of the process, which describes the transition process of operational states of the device (ek , k = 1, 2, 3, 4), and the transition process of its technical states (sl , l = 1, 2, 3). The operational states ek (k = 1, 2, 3, 4) have the following interpretation: e1 – active operation state resulting from the task performed by the device, e2 – state of ready-to-operate stop of the device, e3 – state of planned preventive service of the device, e4 – state of unplanned service of the device, forced by its damage. Whereas the interpretation of the technical states sl (l = 1, 2, 3) is as follows: s1 – state of full serviceability of the device, s2 – state of partial serviceability of the device, and s3 – state of unserviceability of the device. All these states are precisely defined for the ship main engine (SG). A hypothesis is proposed which justifies the use of this model to examine real state transitions in marine power plant device operation processes. The article shows the possibility to make operating decisions ensuring a rational course of the device operation process when the proposed model of this process and the dynamic programming method based on the Bellman’s principle of optimality are applied. The optimisation criterion adopted when making operating decisions is the expected profit to be gained as a result of functioning of the device in the time interval [τ0 , τm], being the sum of the expected profit gained in interval [τ0 , τ1 ] and to be gained in interval [τ1 , τm].
    Źródło:
    Polish Maritime Research; 2021, 1; 116-126
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyczyny pękania wspomaganego przez wodór rozdzielaczy paliwa w silnikach okrętowych
    Estimation of the risk of hydrogen-induced cracking of fuel separators of ship diesel engines
    Autorzy:
    Świeczko-Żurek, B.
    Zieliński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/258043.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    korozja naprężeniowa
    olej silnikowy
    paliwo ciekłe
    stal stopowa
    zmęczenie
    ship diesel engine
    fuel separator
    steel
    cracking
    environmental degradation
    load test
    Opis:
    Wykonano badania skłonności stali 26H2MF i 34HNM do niszczenia środowiskowego przy rozciąganiu próbek ze stałą małą prędkością 10(-6) s(-1), przy obciążeniu stałym dla próbek z karbem oraz przy obciążeniu cyklicznie zmiennym w środowiskach paliwa kotłowego i przepracowanego oleju mineralnego. Obserwowano szybkie pękanie stali w badaniach zmęczeniowych, niewielką utratę plastyczności w próbach statycznego rozciągania oraz brak efektu w próbie stałego obciążenia.
    The susceptibility of the 26H2MF and 34HNM steels to environmental degradation has been investigated at tension at a strain rate 10(-6) s(-1), under constant load on pre-notched specimens, and at fatigue strains in boiler fuel and used mineral oil. The faster cracking of steels in fatigue tests, a small plasticity loss at static tension and no effect at constant load tests have been observed.
    Źródło:
    Problemy Eksploatacji; 2006, 1; 233-239
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problematyka zanieczyszczenia atmosfery przez statki wykorzystywane w transporcie morskim
    The problematics of atmospheric pollution by ships used in maritime transport
    Autorzy:
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/310932.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    transport morski
    zanieczyszczenie atmosfery
    ograniczenie emisji związków toksycznych
    silnik okrętowy spalinowy
    maritime transport
    atmospheric pollution
    reduction of toxic emissions
    ship diesel engine
    Opis:
    W artykule omówiona została problematyka zanieczyszczenia atmosfery związkami toksycznymi emitowanymi przez statki, głównie przez okrętowe silniki tłokowe, stosowane powszechnie zarówno do napędu głównego statków jak i w elektrowniach statkowych. Zarówno rozwój transportu morskiego jak i troska o środowisko naturalne spowodowały, że w latach 90-tych ubiegłego wieku podjęto w Międzynarodowej Organizacji Morskiej (IMO) prace nad aneksem VI do konwencji MARPOL 73/78. Poprzez stosowanie w praktyce określonych w aneksie norm ograniczenia emisji związków toksycznych, oczekuje się wymiernych korzyści dla środowiska. W artykule na podstawie omówionych wyników badań własnych wskazano, jako jedną z metod ograniczenia emisji do atmosfery związków toksycznych, zasilanie silników okrętowych mieszaninami paliwa ropopochodnego z estrami oleju roślinnego. W badaniach stosowano mieszaninę okrętowego oleju napędowego (MDO) z estrem oleju rzepakowego (RME) w różnych proporcjach.
    The paper discusses problems of air pollution by toxic compounds emitted by ships, mainly by marine piston engines, which are commonly used both for main propulsion of ships and in power plants ships. Both, the development of marine transport and care for the environmental caused that in the 90s of the last century in the International Maritime Organization (IMO) has been undertaken work to develop the Annex VI of MARPOL 73/78. Through using in practice, standards reduce emissions of toxic compounds, which it is set out in the Annex, environmental benefits are expected. In the paper, on the basis discussed of own research results, indicated as one way to reduce atmospheric emissions of toxic compounds, combustion in marine diesel engine mixtures of petroleum fuel from vegetable oil esters. In the research mixture of marine diesel oil (MDO) with an of rape-seed oil methyl ester (RME) in different proportioned was used.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 468-473
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of ship steering gear load based on an analysis of rudder angle signal
    Ocena obciążenia maszyny sterowej statku na podstawie analizy sygnału wychylenia steru
    Autorzy:
    Stefanowski, A.
    Zwierzewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/359688.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    automatyczne sterowanie statkiem
    maszyna sterowa statku
    bezpieczeństwo statku
    automatic control of ship
    steering engine of the ship
    safety of the ship
    Opis:
    This paper presents observations and remarks on the work of ship's steering gear controlled by the autopilot in high seas. Attention is drawn to the insufficient power of steering gear operated by the autopilot in high waves and the consequent possibility of overloading and damage to the gear, creating a threat to the ship. Standard safeguards against damage are discussed. It is suggested that the alarm system should be extended to indicate the load of steering gears. The authors propose a method for assessment of the steering gear load by using a signal that is a nonlinear function of the actual rudder angle, based on the solution used in TS-type autopilot adaptation blocks. The results of computer simulations to obtain such signals for autopilot-controlled ship movement in irregular waves (sea state ranging from 3 to 6) are presented. The conclusion reached is that the signal can be used to assess the steering gear load, which may contribute to increasing ship’s safety in high sea states.
    W artykule przedstawiono uwagi o pracy maszyn sterowych statków w wysokich stanach morza sterowanych autopilotem. Zwrócono uwagę na niewystarczającą moc maszyn sterowych dla pracy z autopilotem w tych stanach i możliwość ich przeciążania, uszkodzenia i wprowadzenia zagrożenia dla statku. Omówiono standardowe zabezpieczenia przed uszkodzeniem, wskazując na potrzebę rozszerzenia sygnalizacji alarmowej o układ wskazujący obciążenie maszyn sterowych. Przedstawiono propozycję wykorzystania do oceny obciążenia maszyn sterowych signal będącego nieliniową funkcją rzeczywistego kąta wychylenia steru bazującego na rozwiązaniu stosowanym w blokach adaptacji autopilota TS. Przedstawiono wyniki symulacji komputerowych uzyskiwania takiego signal dla realizacji prowadzenia statku autopilotem na nieregularnej fali przy stanie morza 3, 4, 5, 6. We wnioskach stwierdzono, że signal taki może służyć do oceny obciążenia maszyn sterowych, co może przyczynić się do zwiększenia bezpieczeństwa eksploatacji statku w wysokich stanach morza.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 126-131
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Processing methods of measured runs of torque and angular speed of combustion engine propulsion system
    Autorzy:
    Polanowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/260087.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship piston engine
    torque
    angular velocity
    data processing
    fast Fourier transform (FFT)
    least-squares approximation by using trigonometric polynomials (TLSA)
    movable approximation
    synchronous averaging
    Opis:
    In this paper four processing methods of cyclic data runs, namely : Fourier interpolation and transformation, least-squares approximation by means of trigonometric polynomials , synchronous averaging and movable approximation , were presented by using, as an example, discretely measured runs of torque and angular speed. It was demonstrated that for extracting a useful signal out of disturbance background and decomposing the disturbances the appropriate methods are the synchronous averaging and multiple movable approximation. To emerge significant spectral lines from a spectrum the least-squares approximation by using trigonometric polynomials can be applied. The method contains a criterion for signal filtration and is insensitive to disturbances, run truncation and sampling irregularity. Fast Fourier Transform (FFT) may have an auxiliary significance for preliminary spectral analysis. Its main disadvantage is that in order to build a smoothing-out filter its parameters should be determined in advance, e.g. by applying one of the remaining methods.
    Źródło:
    Polish Maritime Research; 2006, 4; 15-22
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discussion and studies of the properties of a cooling water additive preventing erosive wear of cooled surfaces of ship diesel engines
    Opracowanie i badania własności dodatku do wody chłodzącej zapobiegającego zużyciu erozyjnemu powierzchni chłodzonych okrętowych silników spalinowych
    Autorzy:
    Adamkiewicz, A.
    Valishin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366050.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    erosive wear
    cooling system
    ship diesel engine
    corrosion
    nickel plating
    regressive models
    zużycie erozyjne
    układ chłodzenia
    okrętowy silnik spalinowy
    korozja
    niklowanie chemiczne
    modele regresyjne
    Opis:
    This paper presents the results of studies on the properties of an additive administered into the liquid cooling a ship diesel engine. The protective action of the liquid relied on the formation of nickel layers on the cooled surfaces – electroless nickel plating of cooling surfaces. The test stand and the program of the experiment have been described. Statistical methods have been used for discussing the results. Regressive correlations of mass decrease of the studied samples, dependent on the conditions and the experiment program, have been obtained. Sample mass decrease was described as a function of the additive concentration, the flow and the temperature of the cooling liquid supplied by the pump. High effectiveness of the studied additive was presented comparing it with the substances widely applied for this purpose such as EKSTROL and NALCOOL-2000 basing on the verifying exemplary results. Validation of the obtained results carried out on real maritime technical facilities has been described.
    W artykule przedstawiono wyniki badań własności opracowanego dodatku do cieczy chłodzącej okrętowego silnika spalinowego. Działanie ochronne cieczy oparto na niklowaniu chemicznym – na bezprądowym tworzeniu warstw niklowych na chłodzonych powierzchniach. Opisano stanowisko badawcze oraz program eksperymentu. Do opracowania wyników przeprowadzonego eksperymentu zastosowano metody statystyczne. Otrzymano zależności regresyjne ubytku masy badanych próbek od warunków i programu eksperymentu. Ubytek masy próbek opisano w funkcji stężenia dodatku, strumienia objętości i temperatury cieczy chłodzącej, podawanej przez pompę. Pokazano wysoką skuteczność badanego dodatku w porównaniu ze stosowanymi do tego celu dodatkami EKSTROL i NALCOOL-2000 na przykładzie wyników badań weryfikacyjnych. Opisano walidację wyników przeprowadzoną na rzeczywistych obiektach oceanotechnicznych.
    Źródło:
    Eksploatacja i Niezawodność; 2014, 16, 4; 565-570
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problems of modelling NOx emission from marine diesel engine
    Autorzy:
    Kniaziewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/244726.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    emission
    exhaust gases
    engine
    ship
    modelling
    Opis:
    The development of marine diesel engines has so far been directed towards increasing their power, reducing fuel consumption, burning fuels of the lowest possible quality and the extension of operation time. The rising pro-ecological pressure has made atmosphere pollution by exhaust gases of marine engines one of the main problems of environmental protection of recent years. The Gdansk Bay area, just like sea ports or coastal regions, is vulnerable to the effect of noxious compounds contained in vessel exhaust gases, besides those coming from industrial plants, power plants or vehicles. This concerns vessels both in ports and in the roads. In order to determine the share of vessels in environmental pollution and to counteract the harmful effects of toxic compounds in marine engine exhaust gases, it is necessary to know the emission values of these compounds from particular vessels, which is possible with the knowledge of their movement parameters, concentration values of particular compounds for these parameters and the atmospheric conditions. The report presents problems of modelling the NOx emission in exhaust gases from main marine Diesel engines, such as problems with construction special models describing the marine vessels movement or define real value of toxic compounds emission.
    Źródło:
    Journal of KONES; 2008, 15, 4; 227-234
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stochastic model of the load spectrum for main engines of sea-going ships
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243406.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    semi-Markov process
    load
    diesel engine
    main engine
    sea ship
    Opis:
    The paper presents possibility of applying the theory of semi-Markov processes for probabilistic description of load spectrum for diesel engines employed for ship propulsion, so for main engines. The considerations include output power characteristics for this kind of engines. The characteristics have enabled formulating a four-member set of states of the process of load on the engines. The theory of semi-Markov processes has been applied for describing the real process of loads on the mentioned engines. This theory has made possible building a model of the engine loads in form of a continuous-time semi-Markov process with a four-state set of values. Properties of a Darboux continuous function, which allow considering the engine loads as the discrete-states and continuous-time processes, have been used to build the model. In consequence a limiting distribution of the occurring process of successive states of engine loads could be determined. The distribution is the probabilities of staying a sea-going ship main engine in successive states of load. The distribution is characterized by the spectrum of loads on this kind of engines. The presented model can be developed by taking into account many states of the process of main engines loading as the need is to make such a probabilistic description of the process that provides possibility of rational control of the operating process.
    Źródło:
    Journal of KONES; 2007, 14, 3; 187-193
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Load analysis of propulsion engine during ships speed acceleratio
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246664.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    load propulsion engine
    ship's speed acceleration
    control engine operation
    running non-overload engine
    Opis:
    The following paper presents load analysis of propulsion engine during ship's speed acceleration. This process is carried out after manoeuvring in order to receive, as fast as possible, exploitation speeds of the ship, achieved during the voyage. The analysis concerns direct propulsion power system of low-speed engine of constant pitch propeller. Wrong steering process of engine load changes in temporary states, can cause engine overloading, as the result of its operation on the external limiting characteristic and can end up in engine seizure. Control of engine operation is carried on through selecting of adequate setting of rotational speed governor, which for specified external conditions can result in adequate position of fuel link and the choice of adequate fuel index arm dose. Equalization of the power delivered by the engine in given conditions of work with power required by the ship’s propeller cooperating with the hull, will establish adequate rotational speed of the engine and finally the speed of the vessel. In order to speed up the sip's motion, there must occur an overflow of propeller thrust over the required thrust (resistance) and this, in turn, is connected with the necessity to ensure the engine power surplus over the power required for a given range of operation or in other words sailing speed. This article presents the working model of ship propelling system during speed acceleration and concerns mainly nonoverload running of the engine. The model described above has been verified during tests in real conditions at sea.
    Źródło:
    Journal of KONES; 2012, 19, 2; 443-448
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy - time method for assessment of main diesel engine operation
    Autorzy:
    Rudnicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/246378.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship power plants
    diesel engine performance
    reliability
    Opis:
    This paper presents a development of the known qualitative method for assessment of engine operation, applied to ship main diesel engine as an example. According to this interpretation engine operation can be presented as a physical quantity. In this aspect, based on the selected functional system of the engine, was assessed usefulness of the quantity for description reliability features of the system. To the analysis was applied Poisson's uniform process which made it possible to elaborate a model of run of worsening the considered system's operation taken as a random process of identical independent decreases of energy efficiency within a given time interval. The presented method is a valuable supplement for description reliability features of ship main engine what is important for realization of shipping tasks by sea. Additional advantage is versatility which makes that it can be applied to reliability analysis of any ship device or ship energy subsystem. Classification of the engine serviceability states with taking into account the assessment of its operation in energy-time aspect, schematic diagram of lubricating system of RTA48-TB engine and values of lubricating oil parameters in steady conditions for the engine load, graphical presentation of lubricating oil cooler operation graphical interpretation of the decreasing of oil cooler efficiency are presented in the paper
    Źródło:
    Journal of KONES; 2007, 14, 3; 519-526
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnozowanie okrętowego układu napędowego z turbinowymi silnikami spalinowymi
    Diagnosing of combined cogag type ships power plant
    Autorzy:
    Grządziela, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/387132.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    silnik spalinowy
    okręt
    diagnostyka
    combustion engine
    ship
    diagnostic
    Opis:
    W artykule przedstawiono propozycję metodyki oceny dynamiki okrętowego układu napędowego z silnikami turbinowymi LM 2500 z wykorzystaniem systemów DGPS i EGNOS. Rozpatrzono wytypowane parametry eksploatacyjne oraz ich powiązanie z przyspieszeniem, prędkością i drogą okrętu w stanie nieustalonym. Scharakteryzowano sposób prze- twarzania i gromadzenia danych oraz omówiono powstałe przy pomiarze błędy a także przeprowadzono dyskusję nad przydatnością obu systemów dla pozycjonowania jednostki.
    The paper presents a proposal method of diagnosing dynamics of ships combined propulsion system with gas turbine engines LM 2500 type with the use of DGPS and EGNOS systems. Two operational parameters were considered according acceleration, speed and distance of the ship during non-steady state. Methods of collecting and processing of measurement data were characterized, moreover calculated errors were presented as well. The discussion about helpfulness of both systems for posi- tioning of vessel finalized the paper.
    Źródło:
    Acta Mechanica et Automatica; 2009, 3, 3; 23-27
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvements to a fire safety management system
    Autorzy:
    Zeńczak, Wojciech
    Krystosik-Gromadzińska, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/258716.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    fire safety
    management system
    engine room
    ship accidents
    Opis:
    The statistics invariably show that most onboard fires originate in the engine room. In hazardous conditions, fires can spread to other rooms of the ship and cause the loss of human life, and can cause the ship to be out of service or lost completely. To prevent these serious consequences, the engine room crew should be aware of hazards and ways to prevent them. It is also advisable to support their routine activities and actions in critical situations with an appropriate management system. For this reason, a survey was conducted at the beginning of 2019 of engine room crew members employed by a European shipowner, as a contribution to an analysis of fire safety management. Based on the results of the survey, some of the elements of the fire safety management system of the ship engine room are described. A properly constructed system that is understandable and accepted by the crew is one of the most important factors in increasing fire safety on a ship. Familiarisation with adequate procedures can significantly contribute to the successful prevention of accidents. This paper also proposes a checklist based on suggestions by the crew, which may be helpful in onboard fire prevention.
    Źródło:
    Polish Maritime Research; 2019, 4; 117-123
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling ships main and auxiliary engine powers with regression-based machine learning algorithms
    Autorzy:
    Okumuş, Fatih
    Ekmekçioğlu, Araks
    Kara, Selin Soner
    Powiązania:
    https://bibliotekanauki.pl/articles/1573652.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    machine learning
    regression
    ship emissions
    engine power
    prediction
    Opis:
    Based on data from seven different ship types, this paper provides mathematical relationships that allow us to estimate the main and auxiliary engine power of new ships. With these mathematical relationships we can estimate the power of the engine based on the ship’s length (L), gross tonnage (GT) and age. We developed these approaches using simple linear regression, polynomial regression, K-nearest neighbours (KNN) regression and gradient boosting machine (GBM) regression algorithms. The relationships presented here have a practical application: during the pre-parametric design of new ships, our mathematical relationships can be used to estimate the power of the engines so that more environmentally friendly ships may be built. In addition, with the machine learning methodology, the prediction of the main engine (ME) and auxiliary engine (AE) powers used in the numerical calculation of ship-based emissions provides data for researchers working on emission calculations. We conclude that the GBM regression algorithm provides more accurate solutions to estimate the main and auxiliary engine power of a ship than other algorithms used in the study.
    Źródło:
    Polish Maritime Research; 2021, 1; 83-96
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operational verification of a ship main power system element choice : case study
    Autorzy:
    Adamkiewicz, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/245251.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship main power system
    turbo-charging system
    operational parameters
    main engine
    ship propeller
    Opis:
    The article refers to results and conclusions on post-emergency repairs of a turbo-charging system of a DEUTZ engine of the SBV 8M 628 type of 1715 kW – the main power unit of a cement carrier. The failure of the turbocharger led to severing of a part of the exhaust outlet valve head. In order to determine the cause of the turbocharger fault, parametric identification of the reference state of the turbocharging system interacting with the ship main power engine has been carried out. The post-emergency servicing of the turbocharger comprised mounting a new blade rim of expansive instruments of smaller capacity than the so far used. Control measurement results of the power system after the replacement of the turbocharger turbine nozzle have been presented. Limitations of correct engine operation have been noted in the range of maximum load with continuous power (MCR). A range of corrective maintenance servicing of fuel equipment has been presented. Using the values of measured torque at the propeller shaft, incorrect interaction between the shaft and the main engine has been noted. A new propeller, adequate to the design operational parameters of the engine characteristics, has been chosen and mounted. The correctness of turbine expansive instrument replacement has been verified by correct interaction between the elements of the power system: propeller – main engine – turbocharging system. Thus, a wider range of economically acceptable ship operation has been obtained.
    Źródło:
    Journal of KONES; 2019, 26, 4; 7-14
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Features of load and wear of main propulsion devices on sea-going ships with piston combustion engines and their impact on changes in technical states of the systems
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259714.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    load
    reciprocating internal combustion engine
    seagoing ship
    propulsion system of a ship
    wear
    Opis:
    The paper presents the specificity of operation of propulsion systems of seagoing ships which causes the need to control the load on them, especially on their engines called main engines. The characteristics of the load on the propulsion systems, especially on the main engines as well as on the shaft lines and propellers driven by the engines, along with the process of wear in tribological joints (sliding tribological systems) of the machines have been described herein. Using examples of typical types of wear (both linear and volumetric) for the tribological systems of this sort, interpretation of states of their wear has been provided with regards to the wear levels defined as acceptable, unacceptable and catastrophic. The following hypotheses have been formulated: 1) hypothesis explaining necessity to consider the loads on the systems under operation as stochastic processes; 2) hypothesis explaining a possibility of considering the processes as stationary; and 3) hypothesis explaining why it can be assumed that a given technical state of any tribological system can be considered as dependent only on the directly preceding state and stochastically independent of the states that existed earlier. Accepting the hypotheses as true, a four-state continuous-time semi-Markov process has been proposed in the form of a model of changes in condition of a propulsion system (PS) of any ship. The model includes the most significant states affecting safety of a ship at sea, such as: s0 – PS ability state, s1 – PS disability state due to damage to the main engine (ME), s2 – PS disability state due to damage to the shaft line (SL) and s3 – PS disability state due to damage to the propeller (P). Probability of occurrence (changes) of the states has also been demonstrated.
    Źródło:
    Polish Maritime Research; 2017, 4; 57-66
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model for calculating fuel consumption in real effect weather for a vehicle vessel
    Autorzy:
    Szelangiewicz, Tadeusz
    Żelazny, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2064730.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    fuel consumption
    engine control criteria
    engine power
    ship speed
    wind and wave effects
    Opis:
    During ship operation, one of the most important tasks is forecasting the ocean route. One of the criteria for forecasting is the minimum fuel consumption. Fuel consumption and associated emissions are also very important for other criteria. In common use, as well as in various publications, the results of calculations of fuel consumption obtained from simplified algorithms are presented. The article presents a mathematical model for calculating fuel consumption for a floating vessel in various weather conditions. In this model different criteria for controlling the propulsion engine were used by changing the fuel dose. The results of the calculations included include: fuel consumption, power of the propulsion engine and operating speed of the ship in varying weather conditions
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 367--374
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charging station location optimization of electric ship based on backup coverage model
    Autorzy:
    Zhang, W.
    Yan, X.
    Zhang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/117632.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    main engine
    ship propulsion
    charging station
    electric ship
    backup coverage model
    electric ship energy
    electric energy supply
    ship charging station
    Opis:
    In terms of electric ship energy requirement in navigation, the ship charging station location is especially important. In this paper, a multi-period ship charging station location optimization model is pro-posed to make location decision in overall, from initial possible station sites chosen to the capacity determination for the final location sites. In the first phase, from the perspective of external environment, find out all possible ship charging station candidate sites through the feasible analyze. In the second phase, taking the ship charging demands into consideration, the final ship charging station sites can be selected among the candidate sites based on backup coverage model. In the last phase, regarding the cost of construction and service capability for different grade as the main factor in capacity determination, the optimal capacity of each final ship charging station are determined by means of optimization method. Finally, an example of Yanqi lake in China is used to verify the validity of the proposed methodology. The reasonable location of charging station could ensure the electric energy supply and avoid congestion caused by ship charging gathering. The model can be easily generalized to other problems regarding facility allocation based on user demand.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 323-327
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Emission inventory of exhaust gases from oil - fired ship boilers
    Autorzy:
    Myśków, J.
    Borkowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/242902.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship
    oil-fired boiler
    marine diesel engine
    exhausts emission
    Opis:
    Regulations concerning the limitation of harmful compounds emission contained in exhaust gases become more restrictive. This is observed within regulations regarding land-based installations and also rules applied to ships of global trade fleet. Other restrictions of vessels emissions, enclosed in rules set out in Annex IV of Marpol Convention 73/78 are gradually implemented and establish emission limits for ship engines. The boiler delivers the heat energy required for fuel preparation for main and auxiliary engines - and also by consuming fuel in its combustion chamber becomes and emitter. This article describes the anticipated methodology of the boiler steam efficiency, depending on the main engine installed. Additionally, fuel oil consumption analysis in various steam capacity range performed using the histograms. The histograms were produced on the basis of service reports of similar units, and combining fuel oil consumption with exhaust emission during operation. A vessel engine report includes monthly machinery abstract and is compiled for a ship-owner on the basis of the log book records. Quantified exhaust emission from auxiliary oil fired boiler contributes determination the overall emissions from a ship.
    Źródło:
    Journal of KONES; 2012, 19, 4; 487-494
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assesment of operation of ship main diesel engine using the theory of semi-Markovian and Markov processes
    Autorzy:
    Rudnicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/245616.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    operations
    ship power plant
    diesel engine
    semi-Markov processes
    Opis:
    Operation of ship propulsion system is associated with realization of definite operational goals. If to elements of the system the operational reliability strategy could be applied, the situation would be very simple as existing conditions would unambiguously determine application of means being on hand. However decision to reject application of the strategy (even if hypothetical) becomes obvious with a view of necessity of ensuring an acceptable level of safety to ship and environment as well as presence of associated formal and legal limitations. Therefore complexity of operational reality makes that means intended for operation may be used in various ways. Objectivity and rationality in making decision, assumed optimal in given conditions, forces to apply an evaluating (quantitative) approach to the problem, hence to search for such their parameters (indices) which, in a given decision situation, can be deemed most adequate. To precisely determine the task it is necessary to specify also its duration time, apart from conditions in which it will be realized. When considering propulsion engine, i.e. the main element of ship propulsion system, especially important becomes not only the problem which amount of energy could be at one's disposal but also within which time interval it could be delivered. Therefore apart from applying the commonly used reliability indices, it seems sensible to consider the operation in such evaluating approach as it could be determined by energy and time simultaneously.
    Źródło:
    Journal of KONES; 2009, 16, 3; 325-333
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on the effects of cold starts of the ship main engine
    Autorzy:
    Adamkiewicz, Andrzej
    Fydrych, Janusz
    Drzewieniecki, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/32907856.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    cold start-ups
    damage
    inlet valves
    main engine
    ship
    Opis:
    This article presents the influence of various ship’s operational conditions occurring during manoeuvres related to entering and leaving the ports and mooring operations. Frequent starts and stops of the ship’s propulsion unit are then required, which affect the variability of the energetic loads of the ship’s power plant, causing accelerated, non-design wear of the ship’s main propulsion engine. The effects of cold start-ups of the main ship engine are the subject of this study. Conditions of the engine inlet valve damage process are discussed. The physics of the degradation process leading to air inlet valve damage was considered. Laboratory tests of structure continuity and their results are discussed, and the valve material defects were excluded as the cause of the damage. The causes of repeated damage to the inlet air valves were identified. The effectiveness of the performed corrective measures was confirmed by a documented control test of the engine start-up. The article is a utilitarian premise for the requirements of the Classification Society.
    Źródło:
    Polish Maritime Research; 2022, 3; 109-118
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of human error in marine engine maintenance
    Autorzy:
    Islam, R.
    Anantharaman, M.
    Khan, F.
    Garaniya, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/116425.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    engine room maintenance
    human error
    marine engine
    marine engine maintenance
    maritime safety
    ship maintenance
    maintenance activity
    onboard maintenance
    Opis:
    Maritime safety involves minimizing error in all aspects of the marine system. Human error has received much importance, being responsible for about 80% of the maritime accident worldwide. Currently, more attention has been focused to reduce human error in marine engine maintenance. On-board marine engine maintenance activities are often complex, where seafarers conduct maintenance activities in various marine environmental (i.e. extreme weather, ship motions, noise, and vibration) and operational (i.e. work overload and stress) conditions. These environmental and operational conditions, in combination with generic human error tendencies, results in innumerable forms of error. There are numerous accidents that happened due to the human error during the maintenance activities of a marine engine. The most severe human error results in accidents due to is a loss of life. Moreover, there are other consequences too such as delaying the productivity of marine operations which results in the financial loss. This study reviews methods that are currently available for identifying, reporting and managing human error in marine engine maintenance. As a basis for this discussion, authors provide an overview of approaches for investigating human error, and a description of marine engine maintenance activities and environmental and operational characteristics.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 43-47
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vessel main propulsion engine performance evaluation
    Autorzy:
    Borkowski, T.
    Kowalak, P.
    Myśków, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247310.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship main propulsion
    marine diesel engine
    Energy Efficiency Design Index
    Opis:
    In general, the performance of a ship in service is different from that obtained on shipyard sea trial. Apart from any differences due to loading conditions, and for which due correction should be made, these differences arise principally from the weather, fouling and surface deterioration of the hull and propeller. The influence of the weather, both in terms of wind and sea conditions, is an extremely important factor in ship performance analysis. Consequently, the weather effects needs to be taken into account if a realistic evaluation is to be made. The primary role of the ship service analysis is a standard of performance data, under varying operational and environmental conditions. The resulting information, derived from this data, becomes the basis for operational and chartering decision. In addition, the part for the data records is to enable the analysis of trends of either the hull or machinery, from which the identification of potential failure scenarios and maintenance decisions can be derived. The traditional method of data collection is the deck and engine room log records, and this is the most commonly used method today. In terms of data processing and capabilities, this method of data collection is far from ultimate, since involves significant data distortion risk. Instrumentation errors are always a potential source of concern in performance analysis methods. Such errors are generally in the form of instrument drift or gross distortion of the reading. However, these can generally be detected by the use of trend analysis techniques. The procedure for the evaluation of the ship's service performance, that relies on proven methods of main propulsion engine service data analysis used and applied for container vessel - small feeder. The vessel is equipped with indirect main propulsion, driven by means of modern medium speed engine. The different approach demonstrated to achieve the reliable and accurate main engine performance. The difference in developed engine power has been found, that corresponds well to registered sea trial results and engine retrofitting reports done, in order to limit the effective power.
    Źródło:
    Journal of KONES; 2012, 19, 2; 53-60
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The increase of operational safety of ships by improving diagnostic methods for marine diesel engine
    Autorzy:
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/117520.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    diagnostic methods
    marine diesel engine
    main engine
    ship propulsion
    operational safety
    injection system
    damage
    fuel oil
    Opis:
    This article shows the importance of the diagnostic improvement methods of marine engines to boost the economy and safety of operation of marine cargo ships. The need to implement effective diagnostic methods is justified by presenting statistical data of marine diesel engines failure and the cost of their operation. Based on the own research has been proven, for the chosen example, that indicator diagrams and analysis of indicated parameters have limited utility in the diagnosis of damages of marine engine, although this is a method commonly used in operational practice. To achieve greater diagnostic effectiveness, when, based on indicator diagrams, are calculated and then the characteristics of heat release is analyzed - net of heat release characteristics and the intensity of the heat release, it was demonstrated. This procedure is particularly effective in the diagnosis of damage of injection system components marine diesel engine.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 317-321
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the possible increasing of efficiency of ship power plant with the system combined of marine Diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in series and the steam turbine
    Autorzy:
    Dzida, M.
    Girtler, J.
    Dzida, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/258820.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship power plants
    combined systems
    diesel engine
    gas turbine
    steam turbine
    Opis:
    The article presents a concept of a combined large power ship propulsion system consisting of the leading Diesel main engine, associated with a power gas turbine and the steam turbine system which utilise the energy contained in the exhaust gas leaving the Diesel engine. In the examined variant of the combined system the power turbine is fed in series with the exhaust gas. A calculation algorithm is given along with the results of calculations of particular subsystems of: the turbocharging system, the power gas turbine, and the steam turbine cycle. Assumptions and limits adopted in the calculations are presented. Selected system parameters were confronted with the results of experimental investigations available in the literature. The power optimisation of the entire combined ship power plant was only performed taking into account the thermodynamic point of view, leaving aside technical and economic aspects. Numerical calculations were performed for the 52 MW low-speed Diesel engine produced by Wärtsilä.
    Źródło:
    Polish Maritime Research; 2009, 3; 26-31
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploration of a model thermoacoustic turbogenerator with a bidirectional turbine
    Autorzy:
    Korobko, Volodymyr
    Serbin, Serhiy
    Le, Huu Cuong
    Powiązania:
    https://bibliotekanauki.pl/articles/34604689.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    waste heat recovery
    ship power plant
    thermoacoustics
    thermoacoustic engine
    bidirectional turbine
    Opis:
    The utilisation of the thermal emissions of modern ship power plants requires the development and implementation of essentially new methods of using low-temperature waste heat. Thermoacoustic technologies are able to effectively use lowtemperature and cryogenic heat resources with a potential difference of 500–111 K. Thermoacoustic heat machines (TAHMs) are characterised by high reliability, simplicity and environmental safety. The wide implementation of thermoacoustic energy-saving systems is hampered by the low specific power and the difficulties of directly producing mechanical work. An efficient approach to converting acoustic energy into mechanical work entails the utilisation of axial pulse bidirectional turbines within thermoacoustic heat engines. These thermoacoustic turbogenerators represent comprehensive systems that consist of thermoacoustic primary movers with an electric generator actuated by an axial-pulse bidirectional turbine. The development of such a thermoacoustic turbogenerator requires several fundamental issues to be solved. For this purpose, a suitable experimental setup and a 3D computational fluid dynamics (CFD) model of a thermoacoustic engine (TAE) with bidirectional turbines were created. The research program involved conducting physical experiments and the CFD modelling of processes in a TAE resonator with an installed bidirectional turbine. The boundary and initial conditions for CFD calculations were based on empirical data. The adequacy of the developed numerical model was substantiated by the results of physical experiments. The CFD results showed that the most significant energy losses in bidirectional turbines are manifested in the output grid of the turbine.
    Źródło:
    Polish Maritime Research; 2023, 4; 102-109
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experiences with gas engines during practical ship operations – impact of load fluctuations during generator operations on the ship’s power grid
    Autorzy:
    Rother, S.
    Watter, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/135382.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    LNG
    gas engine
    dual-fuel engine
    load fluctuation
    MODELICA
    simulation
    fluid dynamics
    thermodynamics
    practical advice
    ship operation
    Opis:
    Liquefied natural gas (LNG) qualifies as sustainable and secure marine fuel that is reliable in supply. The international standards (IGF Code) and classification regulations have been aligned. First experiences in ship operations and design are now available. Initial reports from the practical ship operations show that the lack of knowledge and misjudgements of original equipment manufacturers (OEM’s), suppliers, consulting services and flag state authorities have led to operational restrictions or expensive retrofitting. The aim of this paper is to illustrate first experiences and operating instructions using this new and different marine fuel; derive recommendations for instructions for education and training programmes at maritime colleges, universities and business partners; present action recommendations for future operational concepts.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 55 (127); 44-50
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy efficiency design index of container vessel - operational approach
    Autorzy:
    Borkowski, T.
    Kasyk, L.
    Kowalak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/241715.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship
    main propulsion
    marine diesel engine
    Energy Efficiency Design Index
    exhaust emission
    Opis:
    The ship "Energy Efficiency Design Index (EEDI)" has been formulated by the IMO Marine Environment Protection Committee (MEPC) as a measure of the CO2 emission performance of ships. The ship EEDI is calculated based on characteristics of the ship at build, incorporating parameters including ship capacity, engine power and fuel consumption. Shipping is responsible for CO2 discharge of approximately 3.3% global emission and despite being an energy-efficient transport means, compared with other transport modes, there are opportunities for increasing energy efficiency. The EEDI requires a minimum energy efficiency level (CO2 emissions) per capacity mile (e.g. tonne mile) for different ship type and size sectors. With the level being tightened over time, the EEDI will stimulate continued technical development of all the components influencing the energy efficiency of a ship. The paper presents an overview of EEDI calculation method for container vessels and results of experimental approach. The experimental process results through comprehensive analysis of operational data, from modern container vessel, equipped with direct main propulsion unit have been introduced. Ship operators have already been implementing energy efficiency operational measures and set goals for reducing the energy consumption of their fleet. Performance and savings are not always monitored and reported. However, it can be foreseen that such activity when is successfully promoted, reduction of CO2 emissions can be achieved.
    Źródło:
    Journal of KONES; 2012, 19, 4; 93-100
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Step by Step Approach for Evaluating the Reliability of the Main Engine Lube Oil System for a Ships Propulsion System
    Autorzy:
    Anantharaman, M.
    Khan, F.
    Garaniya, V.
    Lewarn, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/116248.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Propulsion
    Main Engine
    Main Propulsion
    Lubricating Oil System
    Markov Analysis
    reliability
    Propulsion System
    Engine Lube Oil System
    Opis:
    Effective and efficient maintenance is essential to ensure reliability of a ship's main propulsion system, which in turn is interdependent on the reliability of a number of associated sub- systems. A primary step in evaluating the reliability of the ship's propulsion system will be to evaluate the reliability of each of the sub- system. This paper discusses the methodology adopted to quantify reliability of one of the vital sub-system viz. the lubricating oil system, and development of a model, based on Markov analysis thereof. Having developed the model, means to improve reliability of the system should be considered. The cost of the incremental reliability should be measured to evaluate cost benefits. A maintenance plan can then be devised to achieve the higher level of reliability. Similar approach could be considered to evaluate the reliability of all other sub-systems. This will finally lead to development of a model to evaluate and improve the reliability of the main propulsion system.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 367-371
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości badania emisji związków szkodliwych w spalinach okrętowego turbinowego silnika spalinowego w warunkach eksploatacji
    Possibility of emissions test harmful compounds in the exhaust marine turbine engine during operation
    Autorzy:
    Wirkowski, P.
    Markowski, J.
    Kniaziewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/315237.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    okrętowy silnik turbinowy
    silnik turbinowy
    spaliny statków
    emisja spalin
    marine turbine engine
    turbine engine
    ship exhaust
    exhaust emission
    Opis:
    W artykule przedstawiono mechanizmy powstawania szkodliwych związków spalin silnika turbinowego oraz ogólnie opisano jak parametry pracy silnika turbinowego wpływają na emisję takich związków szkodliwych spalin jak tlenki azotu (NOx), tlenek węgla (CO), dwutlenek węgla (CO₂), niespalone węglowodory (HC) oraz cząstki stałe (PM). Zaprezentowane zostały wyniki wstępnych badań emisji związków szkodliwych spalin laboratoryjnego silnika turbinowego. Dokonano również analizy możliwości przeprowadzenia pomiarów stężeń związków szkodliwych w spalinach okrętowego turbinowego silnika spalinowego układu napędowego w warunkach jego eksploatacji na jednostce pływającej.
    The article presents the mechanisms of formation of harmful compounds flue gas turbine engine and is generally described as the parameters of the turbine engine affect the emission of these compounds harmful exhaust emissions like nitrogen oxides (NOx), carbon monoxide (CO), carbon dioxide (CO₂), unburned hydrocarbons (HC) and particulate matter (PM). Presented preliminary results of emission of harmful exhaust emissions laboratory turbine engine. Also examined the possibility of carrying out measurements of concentrations of pollutants in the exhaust marine gas turbine engine propulsion system in terms of its operation on the vessel.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 1410-1414, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of main engine power of seagoing ship at preliminary design stage
    Autorzy:
    Charchalis, A.
    Krefft, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247536.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    seagoing ships
    container vessels
    preliminary design stage
    ship's propulsion
    main engine power
    Opis:
    Permanent growth of the container shipbuilding has led to the need of research - developing activities with references to design and ship building process. The requirements for the container vessels have been modified and changed compared with the ships built in the eighties of the past century. The ships capacity have been increased up to and even above 10 000 twenty feet containers (TEU) with the service speed above 25 knots. For such a giant sea going vessels with the overall length above 300 meters and draught above 10 meters the ship hull resistance characteristics have been modified. Those conditions bring to the situation where the propulsion power for the seagoing ships reached 80 MW. The estimation of the main engine power relation in the preliminary design stage is the main aim of the paper. The problem is such important as in that stage the most important design decisions with relatively low investment costs are determined. Moreover, the preliminary design stage distinguishes that the designer possesses just a few design parameters given by the ship owner of the future vessel. That is why the correct choice of the main engine power is difficult to determine. Determination of the main propulsion power impacts the electric and heat energy amount and the production way of both energy forms. The main engine equation has been determined based on the container ship's parameters for the entire range of container vessels load capacity (TEU). The values of the design parameters have came from author 's data base for the contemporary container vessels.
    Źródło:
    Journal of KONES; 2010, 17, 4; 89-95
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vlianie temperatury okruzausej sredy na velicinu eksergeticeskogo KPD glavnogo dvigatela
    The Influence of Ambient Temperature on the Efficiency Factor of Main Engine Operation
    Autorzy:
    Behrendt, C.
    Motornyj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/359702.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    EXPLO-SHIP 2004
    marine power plant
    main engine
    efficiency factor
    ambient temperature
    Opis:
    The factor of thermal efficiency, used for the assessement of the use of heat in the diesel engine working cycles, has been based on the the first law of thermodynamics only. This paper indicates the fact that to achieve more comprehensive thermodynamic analyses it is necessary to use factors based on the two laws of thermodynamics. One such factor herein proposed is the exoergic efficiency. The method for the determination of this factor for the main engine is presented. Original relations involving the exoergic efficiency are set out. The factor depends on the ambient temperature.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 21-29
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine, at the main engine - steam turbine mode of cooperation
    Autorzy:
    Dzida, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/258636.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    combined systems
    gas turbine
    piston combustion engine
    ship power plants
    steam turbine
    Opis:
    This paper presents a concept of a ship combined high-power system consisted of main piston engine and associated with it: gas power turbine and steam turbine subsystems, which make use of energy contained in exhaust gas from main piston engine. The combined system consisted of a piston combustion engine and an associated with it steam turbine subsystem, was considered. An algorithm and results of calculations of the particular subsystems, i.e. of piston combustion engine and steam turbine, are presented. Assumptions and limitations taken for calculations, as well as comparison of values of some parameters of the system and results of experimental investigations available from the literature sources, are also given. The system’s energy optimization was performed from the thermodynamic point of view only. Any technical – economical analyses were not carried out. Numerical calculations were performed for a Wärtsilä slow-speed diesel engine of 52 MW output power.
    Źródło:
    Polish Maritime Research; 2009, 1; 47-52
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using Artificial Neural Networks for predicting ship fuel consumption
    Autorzy:
    Nguyen, Van Giao
    Sakthivel, Rajamohan
    Rudzik, Krzysztof
    Kozak, Janusz
    Sharma, Prabhakar
    Pham, Nguyen Dang Khoa
    Nguyen, Phuoc Quy Phong
    Nguyen, Xuan Phuong
    Powiązania:
    https://bibliotekanauki.pl/articles/32918813.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    artificial neural network
    fuel management
    marine engine
    ship fuel consumption
    energy efficiencys
    Opis:
    In marine vessel operations, fuel costs are major operating costs which affect the overall profitability of the maritime transport industry. The effective enhancement of using ship fuel will increase ship operation efficiency. Since ship fuel consumption depends on different factors, such as weather, cruising condition, cargo load, and engine condition, it is difficult to assess the fuel consumption pattern for various types of ships. Most traditional statistical methods do not consider these factors when predicting marine vessel fuel consumption. With technological development, different statistical models have been developed for estimating fuel consumption patterns based on ship data. Artificial Neural Networks (ANN) are some of the most effective artificial methods for modelling and validating marine vessel fuel consumption. The application of ANN in maritime transport improves the accuracy of the regression models developed for analysing interactive relationships between various factors. The present review sheds light on consolidating the works carried out in predicting ship fuel consumption using ANN, with an emphasis on topics such as ANN structure, application and prediction algorithms. Future research directions are also proposed and the present review can be a benchmark for mathematical modelling of ship fuel consumption using ANN.
    Źródło:
    Polish Maritime Research; 2023, 2; 39-60
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania wpływu struktury elektrowni gazowo-parowych na charakterystyki sprawności
    The Influence of the Structure of a Gas-And-Steam Power Station on the Characteristics of Efficiency
    Autorzy:
    Kotowicz, J.
    Chmielniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/359427.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    turbina gazowa
    układy gazowo-parowe
    EXPLO-SHIP 2006
    gas turbine engine
    combined cycle
    Opis:
    W artykule przedstawiono dwie metodologie określania sprawności elektrowni gazowo-parowych. Dla każdej metodologii przedstawiono przykłady obliczeniowe. Opracowane metodologie pozwalają wyznaczyć sprawność badanych układów w funkcji temperatury na wlocie do turbiny gazowej i stopnia sprężania przy optymalnej części parowej układu. Obliczenia wykonano dla różnych struktur elektrowni: z kotłem jednociśnieniowym, dwuciśnieniowym z przegrzewem i bez przegrzewu międzystopniowego oraz trójciśnieniowym z przegrzewem międzystopniowym.
    The paper deals with two methods of determining the efficiency of combined gas-and-steam power stations. For each of them examples of calculations have been quoted. These two methods permit to determine the efficiency of investigated systems as a function of temperature at the inlet to the gas turbine and the compression ratio for the optimal steam part of the system. Calculations have been carried out concerning various structures of power stations with a single-pressure waste-heat boiler, a double-pressure waste-heat boiler with and without reheat and a triple-pressure waste-heat boiler and reheat.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 273-286
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie zużycia paliwa przez silnik napędowy statku za pomocą analizy wymiarowej
    Determination of Ship Main Engine Fuel Consumption by Means of Dimensional Analysis
    Autorzy:
    Rosłanowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359435.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    zużycie paliwa przez silnik
    EXPLO-SHIP 2006
    parametry ruchu statku
    analiza wymiarowa
    engine fuel consumption
    ship running parameters
    dimensional analysis
    Opis:
    W artykule przedstawiono sposób określenia zużycia paliwa przez silnik spalinowy w oparciu o pomiary wykonane na statku. Wykorzystano przy tym schemat algebraiczny analizy wymiarowej zaproponowany przez Drobota. Wybrano optymalną bazę wymiarową funkcji zużycia paliwa przez silnik spalinowy w oparciu o kryterium najmniejszych kwadratów. Porównano metodę określenia funkcji zużycia paliwa z metodami tradycyjnie dotąd stosowanymi. Wskazano na zalety proponowanej metody.
    This article presents a method of determination of the fuel consumption by a main propulsion diesel engine on the basis of sea trials measurements. An algebraic scheme of dimensional analysis proposed by Drabat was used for the purpose. The least squares method was chosen for the selection of optimum dimension data base. The proposed method of the determination of fuel consumption function is compared with traditional methods. Besides, advantages of proposed method are pointed out.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 345-354
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perspektywy wykorzystania gazu ziemnego w silnikach okrętowych
    Prospects for Natural Gas Application in Marine Engines
    Autorzy:
    Żmudzki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/359714.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    gaz ziemny
    spalanie
    silnik okrętowy
    EXPLO-SHIP 2004
    natural gas
    combustion
    marine engine
    Opis:
    Zaprezentowano własności gazu ziemnego jako potencjalnego paliwa do zasilania silników spalinowych, w szczególności w napędach statków. Scharakteryzowano wymagania stawiane instalacji zasilającej paliwa gazowego. Omówiono właściwości tworzenia i spalania mieszaniny powietrze - gaz ziemny, zwracając uwagę na warunki prowadzące do spalania stukowego. Opierając się na wybranych wskaźnikach pracy współczesnych silników zasilanych gazem ziemnym, zaproponowano wykorzystanie silników dwupaliwowych oraz instalacji ciekłego gazu ziemnego, sprężonego do bardzo wysokiego ciśnienia z wtryskiem do komory spalania.
    The properties of natural gas as potential fuel for combustion engines, particularly those used for ship propulsion have been presented. The requirements for gas system, as well as gas - air mixture formation and combustion, including knocking, have been described. Taking into account the main gas engine variables, the dual fuel engine has been proposed for installation, as well as high pressure liquid natural gas system and gas injection into the engine combustion chamber.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 517-528
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance and emission modelling and simulation of marine diesel engines using publicly available engine data
    Autorzy:
    Ghaemi, Mohammad Hossein
    Powiązania:
    https://bibliotekanauki.pl/articles/2033202.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine diesel engine
    mathematical model
    Mean-Value Model
    simulation of ship propulsion system
    Opis:
    To analyse the behaviour of marine diesel engines in unsteady states for different purposes, for example to determine the fuel consumption or emissions level, to adjust the control strategy, to manage the maintenance, etc., a goal-based mathematical model that can be easily implemented for simulation is necessary. Such a model usually requires a wide range of operating data, measured on a test stand. This is a time-consuming process with high costs and the relevant data are not available publicly for a selected engine. The present paper delivers a rapid and relatively simple method for preparing a simulation model of a given marine diesel engine, based only on the widely available data in the project guides indicated for steady state conditions. After establishing the framework of the mathematical model, it describes how the parameters of the model can be adjusted for the simulation model and how the results can be verified as well. Conceptually, this is a trial and error method, but the presented case example makes clear how the parameters can be selected to reduce the number of trials and quickly determine the model parameters. The necessary descriptions are given through a case study, which is the MAN-B&W 8S65ME-C8 marine diesel engine. The engine is assumed to be connected to a constant pitch propeller. The presented mathematical model is a mean-value zero-dimensional type with seven state variables. The other variables of the engine are determined based on the state independent variables and the input value, which is the fuel rate. The paper can be used as a guideline to prepare a convenient mathematical model for simulation, with the minimum publicly available data.
    Źródło:
    Polish Maritime Research; 2021, 4; 63-87
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Nitrogen Oxides Emission Reduction Methods on Specific Fuel Consumption of Marine Diesel Engines
    Autorzy:
    Herdzik, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/2069919.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    ship operation
    medium speed diesel engine
    slow speed diesel engine
    emission to atmosphere
    nitrogen oxides emission reduction
    specific fuel consumption
    Opis:
    The paper has been presented the methods of nitrogen oxides emission reduction to fulfill the Tier 2 and Tier 3 requirements of the Annex VI of MARPOL Convention. It has been shown the development of marine two-stroke diesel engines and the change of nitrogen oxides emission from 1960 to 2000 and later up to 2020 after the implementation of NOx emission reduction methods. Specific fuel consumption before 2000, and as a prediction and given data in the manufacturers manuals for Tier 3 engines up to 2020, and as only a prediction up to 2030 has been analyzed and elaborated. Impact of nitrogen oxides reduction methods on the specific fuel consumption of the marine diesel engine has been evaluated. Additional emission of some gases to the atmosphere due to the implementation of reduction methods has been determined. EGR and SCR systems have got a lot of imperfections: required to install additional reduction systems (investment cost, required volume in the engine room), need maintenance and operation costs, produced wastes during treatment process. The estimated additional cost is about 0.8 USD/MWh of produced energy, taking into account only the cost of excessive used fuel. The whole increased cost may reach the level two-three times more due to cleaning systems investment costs, their operational cost and waste disposal. It has been the one of the reasons of worsening the transport effectiveness and competitiveness.
    Źródło:
    Rocznik Ochrona Środowiska; 2021, 23; 279--289
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuel continuous mixer - an approach solution to use straight vegetable oil for marine diesel engines
    Autorzy:
    Van Uy, D.
    The Nam, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117233.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    fuel continuous mixer
    straight vegetable oil
    marine desel engine
    ship operation
    green fuel
    mixed fuel
    Vietnam Maritime University
    diesel engine
    Opis:
    The vegetable oil is well known as green fuel for diesel engines due to its low sunphur content and renewable stock. However, there are some problems raising when vegetable oil is used as fuel for diesel engines such as highly effected by cold weather, lower general efficiency, separation in layer if mixed with diesel oil and so on. To overcome that disadvantiges, the authors propose a new idea that to use a continuous fuel mixer to blend vegetable oil with diesel oil to make so called a mixed fuel supplying to diesel engines inline. In order to ensure a quality of the mixed fuel created by continuous mixer, a homogeneous testing was introduced with believable results. Then, the continuous mixer has been installed into fuel supply system of diesel engine 6LU32 at a lab of Vietnam Maritime University in terms of checking a real operation of the fuel continuous mixer with diesel engine.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 151-157
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Safety culture as an important factor of an engine room’s fire safety
    Autorzy:
    Krystosik-Gromadzińska, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/135376.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    safety culture
    fire safety
    engine room
    safety management
    ship’s safety
    crew safety
    ergonomics
    Opis:
    The human factor is one of the main reasons for fires in engine rooms and most of the scenarios are very similar. Fires in engine rooms are usually associated with fuel or oil leaking onto a hot surface. Furthermore, engine rooms are very inhospitable places to work. Noise, vibration and high temperatures are most frequently mentioned by crews as negative factors that influence their work. The adoption of a safety culture is one of the ways to increase the fire safety level in engine rooms. Understanding and accepting the necessity of building a safety culture among engine room crews can effectively influence their standard of work. Safety management procedures are an important part of building a safety culture. The change in labor standards must be built on a safety culture among crews.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 62 (134); 99-107
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring the performance of a ship’s main engine based on big data technology
    Autorzy:
    Liang, Meng
    Chen, Mingzhi
    Powiązania:
    https://bibliotekanauki.pl/articles/32912852.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    big data of ship energy efficiency
    main engine
    performance evaluation
    cluster analysis
    mechanism analysis
    Opis:
    Under the recent background of ‘Green Shipping’ and rising fuel prices, it is very important to reduce the fuel consumption rate of ships, which is directly affected by the performance of the main engine. A reasonable maintenance schedule can optimise the performance of the main engine. However, a traditional maintenance schedule is based on the navigation distance and time, ignoring many other factors, such as a harsh working environments and frequently changing operating conditions, which will lead to faster performance degradation. In this study, a real-time evaluation method combing big data of ship energy efficiency with physics-based analysis is proposed to judge the degradation of main engine performance and assist in determining the maintenance schedule. Firstly, based on the developed ship energy efficiency big data platform, the distribution statistics and comparison of different operating states are carried out. Gaussian mixture model (GMM) and Density-Based Spatial Clustering of Applications with Noise (DBSCAN) are used to cluster the data and the high-density data areas are obtained as the analysis points. Then, the data of the analysis points are polynomial fitted, by the least square method, to obtain the propulsion characteristics curves, load characteristic curves, and speed characteristic curves, which can be used to observe the performance degradation of the main engine. The results show that this method can effectively monitor the degradation degree of the main engine performance, and is of great significance to fuel efficiency improvements and greenhouse gas (GHG) emissions reduction.
    Źródło:
    Polish Maritime Research; 2022, 3; 128-140
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Probabilistyczna metoda określenia masy substancji szkodliwych emitowanych przez silnik o zapłonie samoczynnym podczas jego rozruchu
    Probabilistic Method of the Determination of Harmfu Substance Mass Emitted by a Diesel Engine During Its Starting
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359487.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    model
    EXPLO-SHIP 2006
    rozruch silnika
    silnik o zapłonie samoczynnym
    substancja szkodliwa
    start up of an engine
    diesel engine
    harmful substance
    Opis:
    Zaproponowano model procesu rozruchu silników o zapłonie samoczynnym, w formie procesu semimarkowskiego, dyskretnego w stanach i ciągłego w czasie eksploatacji. Stanami tego procesu są: stan zimny silnika (s1), stan ciepły silnika (s2) i stan gorący silnika (s3). Przedstawiono koncepcję zastosowania opracowanego modelu do określenia ilości substancji szkodliwych, jakie emitowane są w spalinach podczas rozruchu silnika.
    The paper proposes a model of diesel engine starting process as a semi-Markov process which is discrete in states and continuous during operation. The states of this process are: cold state of the engine (s1), warm state (s2) and hot state of the engine (s3). The concept of using such a model for the determination of the quantity of harmful substances emitted in exhaust gases during the start up of the engine has been presented.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 193-204
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The analysis of overall ship fuel consumption in acceleration manoeuvre using hull-propeller-engine interaction principles and governor features
    Autorzy:
    Zeraatgar, Hamid
    Ghaemi, M. Hossein
    Powiązania:
    https://bibliotekanauki.pl/articles/258468.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    modelling and simulation
    fuel consumption
    hull-propeller-engine interactions
    ship propulsion system
    governor
    control strategy
    Opis:
    The problem of reduction of greenhouse gas emissions in shipping is currently addressed by many research works and related industries. There are many existing and visionary technologies and ideas, which are conceptually defined or practically realised. This goal can be achieved in different ways, and reducing fuel consumption is one of the major methods. In these circumstances, the aim of this study is to analyse the possibility of fuel consumption reduction by using an alternative control strategy for low-speed marine diesel engines which would take into account the interactions between hull, propeller and main engine. For this purpose, a mathematical model including ship hull and propulsion system is developed. A case study is conducted for a ship for which the results of both the ship hull and screw propeller model tests are available. A low-speed two-stroke diesel engine is then selected for the considered ship. Two different governors are included in the model and their parameters are changed to investigate the dynamic behaviour of the system when simulating the forward acceleration mode in calm sea conditions. The research is mainly focused on variations of fuel consumption by the ship passing a certain distance to reach the nominal constant speed. It is concluded that, for a given travel distance, it is possible to save considerable amount of fuel at the expense of slight increase of journey time.
    Źródło:
    Polish Maritime Research; 2019, 1; 162-163
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The researching ship “Gdynia“
    Autorzy:
    Gierusz, W.
    Łebkowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259154.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship’s hull
    main engine
    tunnel thrusters
    electrical motors
    marine navigation devices
    real-time experiments
    Opis:
    The paper presents the physical model of the sea-going ship. The wooden hull of this ship was obtained from Ship Design and Research Centre and next rebuilt and reconstructed for future tests of the different control systems in the real-time experiments. The paper describes the succeeding stages of the work, steering and driving devices installed on board, power electric diagrams and navigational equipment designated for ship. The range of the possible applications of the constructed vessel are presented at the end of the paper
    Źródło:
    Polish Maritime Research; 2012, S 1; 11-18
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Symulacja pracy systemów okretowych na przykładzie układu sterowania i kontroli silnika głównego
    Simulation of work ship` systems for example of the main engine
    Autorzy:
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/157625.pdf
    Data publikacji:
    2003
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    systemy okrętowe
    układ sterujący
    silnik główny okrętowy
    work ship`systems
    main engine control
    monitoring system
    Opis:
    Przedstawiono w artykule koncepcję i realizację układu symulacji pracy systemów okretowych. Koncepcję układu symulacji oparto na połączeniu sterowników PLC, na których modelowane sa obiekty sterowania, z rzeczywistymi systemami sterowania i kontroli. Praktycznie układ zrealizowano łącząc rzeczywisty system sterowania i kontroli okrętowego silnika głównego AutoChief 4 firmy Kongsberg Maritime Ship Systems z modelem silnika głównego typu RTA Sulzer. Uzyskane doświadczenia oraz badania potwierdziły, że jest możliwe zachowując warunki bliskie do rzeczywistych, realizować zadania diagnozowania, podejmowania decyzji oraz obsługi systemów sterowania i kontroli. Zastosowanie w układzie rzeczywistego systemu sterowania i kontrolo, znacznie rozszerzyło zakres możliwych do realizacji zadań badawczych jak i dydaktycznych.
    The concept and realisation of the system for simulated work ships` systems were presented. The concept of simulation system was leaned on the connection PLC controllers, which was modelled the objects of control, with real control and monitoring systems. Practically the system was realised by connection real monitoring and control of ship main propulsion AutoChief 4 of Kongsberg Maritime Ship Systems with model of main engine RTA Sulzer. Taking into account experiences and research the present devices have proved that realization of the assumed didactic task is possible, preserving the conditions close to those observed in real training in automatics system maintenance. A new elements introduced to the presented simulation system is the use of controlling, and measuring systems being in operation on real ships. Use of real systems will assure broader range of research and training.
    Źródło:
    Pomiary Automatyka Kontrola; 2003, R. 49, nr 1, 1; 14-17
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    K ispolzovaniju termodynamiceskih metodov dla analiza effektivnosti utilizacii tepla uhodasih gazov glavnyh dvigatelej
    Thermodynamic Methods for the Analysis of Efficiency of Utilization of Main Engines Exhaust Gases Heat
    Autorzy:
    Behrendt, C.
    Motornyj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/359006.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    OMiUO 2005
    ship power plant
    main engine
    factor of efficiency
    utilization of exhaust gases heat
    Opis:
    It has been shown that the concept of exergue can be used in the analysis of thermo-dynamic efficiency. The concept incorporates both principles of thermodynamics. The factor of exergue efficiency is shown. The developed technique of defining the values of exergue losses occurring at the utilization of heat of internal combustion engine exhaust gases is based. The technique is based on the entropy method. The obtained dependences determining the influence of various factors have been presented as well.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 5 (77); 22-37
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The microprocessor device for measurements of torque and rotational speed on the propeller shaft of ship
    Urządzenie do pomiaru momentu i prędkości obrotowej na wale śruby napędowej statku
    Autorzy:
    Morawski, L.
    Szuca, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/158019.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    okrętowy układ napędowy
    silnik napędu głównego
    pomiar momentu
    momentomierz
    ship's propulsion unit
    main engine
    torquemeter
    Opis:
    The paper presents the new model of torque meter designed in Gdynia Maritime University and Research-Production Enterprise for Maritime Industry "ENAMOR" Ltd., Gdynia. The general idea of measurement makes use of the torsion angle measured on a shaft section (400 mm) using the photo-optical technique. Torque meter unit is equipped with Programmable Logic Device (PLC) for calculations, external parameters acquisition (ex.: speed, trim, shaft generator power etc.) and measured data storage in memory. This unit (bearing a symbol ETNP-8) has also possibility to measure instantaneous fluctuations of the torque and engine rotational speed as a function of the shaft rotation angle. Displaying time-histories of those parameters on the monitor screen of an external PC computer gives the operator an opportunity to make a preliminary performance assessment for each individual cylinder in the engine, and for the drive system as a whole. As an example, the analysis and processing of the measured torque and rotational speed fluctuations are presented. The measurements were done on the training ship m/s Horyzont II, owned by the Gdynia Maritime University.
    Referat przedstawia urządzenie do pomiaru momentu i prędkości kątowej na wale śruby, wykorzystujące fotooptyczny pomiar kąta skręcenia wału. Na podstawie mierzonych czasów trwania zębów i szczelin dwóch tarczy zębowych wyznaczana jest prędkość obrotowa, moment i moc na wale oraz teoretyczne zużycie paliwa. Dołączony do urządzenia zewnętrzny komputer PC, z odpowiednim oprogramowaniem umożliwia pomiar wartości chwilowych momentu i prędkości obrotowej w funkcji kąta położenia wału korbowego. Pomiary wartości chwilowych zawierają informację diagnostyczną o pracy układu napędowego statku.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 12, 12; 5-7
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Termohimiceskaa podgotovka topliva v sistemah toplivopodaci dizelej
    Thermal-Chemical Treatment of Fuel in Fuel Injection Systems of Diesel Engines
    Autorzy:
    Klyus, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/359367.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    EXPLO-SHIP 2006
    diesel engine
    fuel injector
    thermal treatment of fuel
    chemical treatment of fuel
    Opis:
    The paper focuses on problems of fuel treatment using thermal and chemical methods in the body of fuel injector.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 259-265
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczba pierścieni a zjawisko przedmuchów gazów do skrzyni korbowej
    The Number of Rings versus Effect of Blow-By Gases into the Crankcase
    Autorzy:
    Abramek, K. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/360701.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    przedmuchy gazów
    skrzynia korbowa
    tłokowy silnik spalinowy
    EXPLO-SHIP 2004
    blow-by
    crankcase
    combustion engine
    Opis:
    Przedstawiono wpływ zmiany liczby pierścieni na wielkość natężenia przedmuchów spalin do skrzyni korbowej jednocylindrowego, badawczego silnika SB-3.1. Charakterystyki natężenia przedmuchów gazów w funkcji liczby pierścieni sporządzono dla biegu jałowego.
    This paper presents the influence of a change in the number of rings on blow-by into the crankcase of a single-cylinder engine SB-3.1. Blow-by-speed characteristics were made for idle running.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 11-19
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stanowisko do badań diagnostycznych układu łożyskowania tłokowego silnika spalinowego
    A Test Stand for Diagnostic Examination of a Diesel Engine Bearing System
    Autorzy:
    Korczewski, Z.
    Wontka, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/359749.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    tłokowy silnik spalinowy
    łożyskowanie silnika
    diagnostyka
    moc strat mechanicznych
    EXPLO-SHIP 2004
    diesel engine
    bearing system
    diesel engine diagnosis
    power of mechanical losses
    Opis:
    Przedstawiono możliwości wykorzystania stanowiska laboratoryjnego silnika S312C do badań diagnostycznych układu łożyskowania. Wnioskowanie o stanie technicznym jest oparte na pomiarach ciśnień wewnątrzcylindrowych w zakresie biegu jałowego silnika. Daje to w rezultacie możliwość wyznaczenia mocy strat mechanicznych jako parametru charakteryzującego dysypację energii wnoszonej z powietrza i paliwa zasilającego.
    A laboratory test stand of S312C diesel engine can be used for diagnosing the engine bearing system. Conclusions on the technical state are drawn from indicated pressure measurements at the engine running idle. They are subsequently converted into the power of mechanical losses as a parameter characterising dissipation of energy carried into the engine from feeding air and fuel.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 369-380
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the efficiency of a gas-fueled ship power plant using a Waste Heat Recovery metal hydride system
    Autorzy:
    Cherednichenko, Oleksandr
    Tkach, Mykhaylo
    Timoshevskiy, Boris
    Havrysh, Valerii
    Dotsenko, Serhii
    Powiązania:
    https://bibliotekanauki.pl/articles/135623.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    waste heat recovery
    low-speed engine
    metal-hydride
    hydrogen
    LNG-powered ship
    total waste heat utilization factor
    Opis:
    Due to environmental, energy, and operating cost constraints, the number of liquefied natural gas (LNG)–powered ships is increasing. To avoid decreasing the thermal efficiency of two-stroke, low-speed diesel engines, high-pressure gas injection is used. The specific energy consumption of a gas fuel compressor is around 0.35 kWh/kg, which has a negative impact on the efficiency of ship power plants. To reduce the primary energy consumption of a gas fuel supply system, waste heat recovery (WHR) technologies may be used. This study investigated whether WHR metal hydride technology was suitable for improving the efficiency of low-grade heat waste in marine diesel engines. The key factors of this technology were revealed, and the design scheme was described. Working fluids were also analyzed, and a mathematical model of a WHR metal hydride plant was developed, and the results were represented. The calculations showed that the above technology could increase the operating power of a propulsion plant by 5.7–6.2%. The results demonstrate the possibility of applying WHR metal hydride equipment for gas fuel compressor drives in LNG-powered ships. The novelty of this study lies in the investigation of metal hydride technology for application in the waste heat recovery systems of LNG-powered ships.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 59 (131); 9-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on applying the Catfish Biofuel in The Mekong Delta for The Marine Diesel Engine
    Autorzy:
    Quan, P. W.
    Phuoc, H. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/115953.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Propulsion
    marine diesel engine
    Catfish Biofuel
    Mekong Delta
    diesel oil
    Exhaust Gas
    Petrol Oil Replacement
    biofuel
    Opis:
    The manufacturing of Catfish products has been developed rapidly in the Mekong delta. Every year, about 1.2 million tons of Catfish and 150,000 tons of biofuel are produced. The biofuel B100 manufactures in Mekong delta satisfies the America standard ASTM D6751; EURO EN 14214 or Vietnamese standard TCVN 7717. Mekong delta, a lower land area, has a large inland water way system with around 100.000 river boats that operate with marine diesel engine. Using the biofuel for the marine diesel engine in area will reduce the HC, CO, SOx and NOx emission to the environment. Therefore, with a study on applying the catfish biofuel, it will reduce the climate change by the increasing of sea water level and save energy by using green energy to replace petrol oil.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 523-529
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of the Ship’s Technical Failure Model to Assess its Navigational Safety
    Autorzy:
    Gucma, L.
    Gralak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/116693.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Navigational Safety
    Ship's Technical Failure
    Marine Accidents
    Human Factor
    Safety Analysis
    Steering Gear
    Main Engine
    Marine Simulator
    Opis:
    The ship technical failures contribution in overall number of navigational accidents are significantly smaller than those caused by human factor but in safety analysis they cannot be neglected. The paper presents methodology of modeling the technical failures of ships with respect of most important ship systems such as main engine, power generators and steering gear. The repair time is also taken into account. The data for simulation was obtained from analysis of ships statistical data of polish owners. The model could be used mostly in assessment with projecting phase of ship appliances, simulating owner’s economical analysis or generating random events in marine simulators.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 2; 173-176
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiana stopnia sprężania i jej wpływ na właściwości rozruchowe silników z zapłonem samoczynnym
    Change of the Compression Ratio and its Effect on the Start-up Properties of Compression-Ignition Engines
    Autorzy:
    Abramek, K. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/358933.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    stopień sprężania
    tłokowy silnik spalinowy
    właściwości rozruchowe
    EXPLO-SHIP 2006
    compression ratio
    piston combustion engine
    start-up properties
    Opis:
    W referacie przedstawiono wyniki badań zmiany stopnia sprężania na właściwości rozruchowe oraz na średnie ciśnienie końca suwu sprężania i temperaturę sprężonego ładunku dla badawczego, jednocylindrowego silnika SB-3.1. Pomiarów dokonano dla temperatury otoczenia 285 K.
    This paper discusses the results of tests on the effect of compression ratio changes on engine start-up properties, the mean pressure of the compression stroke end and on the temperature of the compressed charge for the tested one cylinder SB-3.1 engine. The measurements were carried out at the ambient temperature 285 K.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 11-19
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Initial considerations for operational parameters intended to minimize fuel consumption by ships in real weather conditions
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/135261.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship
    vessel
    operating
    fuel
    fuel consumption
    speed
    velocity
    weather
    modeling
    rpm
    engine
    hull
    propeller
    thrust
    resistance
    added resistance
    Opis:
    The paper presents the concept of modeling a ship’s operating parameters in order to minimize the fuel consumption in real weather conditions. This is an important innovation because, in ship theory, fuel consumption and speed are usually expressed by average values over longer periods of time, which is a significant limitation. This article presents selected topics of the proposed research such as state-of-the-art, general objectives, scientific and technical expectations, scientific and economic extensions, and environmental impacts. The article also proposes an original method of the research.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 9-14
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measures for estimating transport vessels operators subjective preferences uncertainty
    Autorzy:
    Goncharenko, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/213181.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    pseudo-entropy
    hybrid model
    subjective analysis
    prevailing preferences factor
    dominating preferences index
    ship propulsion
    main engine
    subjective preferences functions
    multialternative situations
    Opis:
    The pseudo-entropy hybrid model is suggested as the measure of uncertainty of operators' subjective preferences. Because of the introduced relative prevailing preferences factor the proposed hybrid model has advantages comparatively to the traditional measures of uncertainty in the view of Boltzmann's or Shannon 's entropy. According to the relative dominating preferences index the pseudo-entropy varies within [-1...1] showing the sign and magnitude of the relative subjective assuredness. Analytical expressions have been achieved. The theoretical concept is illustrated with examples and graphs.
    Źródło:
    Prace Instytutu Lotnictwa; 2013, 1 (228); 13-21
    0509-6669
    2300-5408
    Pojawia się w:
    Prace Instytutu Lotnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of properties of marine Diesel engines run on two kinds of fuel using performance indicators
    Porównanie właściwości silników okrętowych zasilanych dwoma rodzajami paliwa z wykorzystaniem wskaźników efektywności
    Autorzy:
    Adamkiewicz, A.
    Deska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/360771.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    wskaźniki efektywności
    właściwości
    morski silnik Diesla
    układ napędowy
    gazowiec
    key performance indicators
    properties
    marine diesel engine
    ship propulsion system
    gas carrier
    Opis:
    Basing on the evolution of application of different kinds of fuel supplying main engines of gas carriers, this article justifies the need to compare the qualities of these engines. Mass-size, energy and energy-ecological effectiveness indicators have been defined. Properties of self-ignition engines run on one or two kinds of fuel have been considered. Values of key performance indicators have been estimated. On the basis of the identified sets of indicators, comparative analysis of a dual fuel engine with single fuel ones has been carried out.
    Posługując się ewolucją zastosowania różnych rodzajów paliw zasilających silniki główne gazowców, w artykule uzasadniono potrzebę konfrontacji cech tych silników. Zdefiniowano wskaźniki efektywności masowo-gabarytowe, energetyczne i energetyczno-ekologiczne. Rozpatrzono cechy silników o zapłonie samoczynnym zasilanych jednym i dwoma rodzajami paliw. Oszacowano wartości kluczowych wskaźników efektywności. W oparciu o zidentyfikowane zbiory wskaźników przeprowadzono analizę porównawczą cech silnika dwupaliwowego z jednopaliwowymi.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 5-13
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of probabilities defining safety of a sea-going ship during performance of a transportation task in stormy weather conditions
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073602.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    reliability
    semi-Markov process
    diesel engine
    propeller
    sea-going ship
    steering gear
    niezawodność
    silnik wysokoprężny
    śmigło
    statek morski
    proces semi-Markowa
    Opis:
    The paper presents the possibility of applying the theory of semi-Markov processes to determine the limiting distribution for the process of changes of technical states being reliability states of the systems of sea-going ships significantly affecting safety of such ships, which include main engine, propeller and steering gear. The distribution concerns the probabilities of occurrence of the said states defined for a long time of ship operation (t → ∞). The considered states are as follows: s0 – full ability state of the systems, i.e.: main engine, propeller and steering gear, s1 – inability state of the main engine, s2 – inability state of the propeller, s3 – inability state of the steering gear. Significance of the systems for safety of the ships at sea was demonstrated herein. General conditions for performing transportation tasks by the ships, with particular regard to stormy conditions, were also here described.
    Źródło:
    Journal of Polish CIMEEAC; 2017, 12, 1; 21--30
    1231-3998
    Pojawia się w:
    Journal of Polish CIMEEAC
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena parametrów eksploatacyjnych okrętowego turbinowego silnika spalinowego w aspekcie emisji związków szkodliwych spalin
    Evaluation of marine gas turbine engine parameters in terms of issue of emissions of exhaust toxic fumes
    Autorzy:
    Wirkowski, P.
    Kniaziewicz, T.
    Markowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/313353.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    emisja związków szkodliwych spalin
    turbinowy silnik spalinowy
    silnik okrętowy
    spaliny okrętowe
    emissions of harmful exhaust
    gas turbine engine
    motor ship
    ships exhausts
    Opis:
    W artykule przedstawiono analizę stosowania turbinowych silników spalinowych w układach napędowych i elektrowniach jednostek pływających z uwzględnieniem aspektów ekologicznych. Zaprezentowane zostały wyniki wstępnych badań emisji związków szkodliwych spalin laboratoryjnego silnika turbinowego. Dokonano również analizy możliwości przeprowadzenia pomiarów stężeń związków szkodliwych w spalinach okrętowego turbinowego silnika spalinowego układu napędowego w warunkach jego eksploatacji na jednostce pływającej.
    The article presents an analysis of the use of gas turbine engines drive systems and power boats, taking into account environmental aspects. Presented preliminary results of emission of harmful exhaust of laboratory turbine engine. Also examined the possibility of carrying out measurements of concentrations of pollutants in the exhaust marine gas turbine engine propulsion system in terms of its operation on the vessel.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 12; 1458-1462
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fluid cooling systems construction for different combustion engines
    Rozwiązania konstrukcyjne układów chłodzenia cieczą silników tłokowych
    Autorzy:
    Kneba, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/244211.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    układy chłodzenia silników
    silniki samochodowe
    silniki kolejowe
    silniki okrętowe
    wykorzystanie ciepła
    engine cooling systems
    car engines
    rail engines
    ship engines
    energy utilization
    Opis:
    W artykule przedstawiono różne rozwiązania konstrukcyjne układów chłodzenia tłokowych silników spalinowych. Stosowanie układu chłodzenia w silniku spalinowym jest koniecznością wynikającą z ograniczeń dopuszczalnych temperatur pracy jego elementów. Z drugiej strony układ ten powoduje straty cieplne i pożądane byłaby izolowanie cieplne silnika od otoczenia.Szczególną uwagę poświęcono sposobom chłodzenia cylindrów. Zwrócono uwagę na możliwości sterowania parametrami pracy układów.Konstrukcja współczesnych obiegów chłodzenia cieczą silników samochodowych zaczyna być bardziej złożona i upodabnia się do stosowanych już w silnikach okrętowych czy kolejowych. Od silników okrętowych silniki samochodowe różnią się przede wszystkim zmiennością natężenia przepływu cieczy chłodzącej przez silnik, które w silnikach okrętowych pozostaje stałe. Od kilku lat w silnikach samochodowych stosuje się układy chłodzenia nowej generacji wyposażone w elektroniczne sterowanie wieloma urządzeniami wykonawczymi odpowiadającymi za skuteczne chłodzenie w różnych warunkach eksploatacji. Zaawansowane technicznie sterowanie pozwala zmniejszyć zużycie paliwa, obniżyć zawartości toksycznych składników spalin, poprawić komfort cieplny w kabinie samochodu i zwiększyć przebiegi międzynaprawcze silników.
    In the paper some different cooling systems configurations for combustion engines were presented. The application of the cooling system in internal-combustion engine is resultant necessity from the limitations of admissible work temperatures of its elements. Looking from the second side, this system causes thermal losses and thermal insulating of engine from the surroundings will be much-desired. Starting from small passenger car engines trough rail to the ship engines cooling systems are going to be more complicated due to demand of utilization waste energy. Same special remarks were done about controlling cooling circuits.The construction of contemporary liquid cooling circuits of the of car engines begins to be more complex and is similar to the circuits already used in of marine or railway engines. From the marine engines, the car engines differ, above all, by the variable flow of cooling liquid through the engine, which in of ship's engines is constant. For the last few years in of car engines the cooling systems of a new generation is used with the electronic steering of many actuators, responsible for the efficient cooling in the different levels of exploitation. Advanced technically control permits to decrease the expenditure offuel, to lower the contents of exhaust toxic elements, improve thermal comfort in the vehicle interior and to increase the inter-maintenance runs of engines.
    Źródło:
    Journal of KONES; 2008, 15, 2; 183-190
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwość diagnozowania układu wtryskowego silnika okrętowego na podstawie zachodzących w nim procesów
    Possibilities of Diagnosing the Processes in the Injection System of a Marine Diesel Engine
    Autorzy:
    Bejger, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/358946.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    EXPLO-SHIP 2006
    emisja akustyczna
    uszkodzenia silników wysokoprężnych
    analiza falkowa
    wtryskiwacze
    pompy wtryskowe
    acoustic emission
    diesel engine faults
    wavelet analysis
    injector
    injection pump
    Opis:
    Istnieje możliwość zastosowania sygnału emisji akustycznej do diagnozowania układu wtryskowego silnika okrętowego. Wykorzystując dekompozycję sygnału z użyciem metody falkowej można określić istotne parametry procesu wtrysku oraz niektóre z uszkodzeń układu wtryskowego. Dokonano analizy rejestrowanego sygnału emisji akustycznej. Do oceny pracy wybranych elementów zaproponowano utworzenie nowego współczynnika będącego miarą sygnału, która może być zastosowana do szybkiej oceny uszkodzenia.
    It is possible to apply an Acoustic Emission (AE) signal for diagnosing the fuel injection system of a marine diesel engine. By the signal decomposition using the wavelet method we can determine significant parameters of injection and some failures of the injection system. For the estimation of operation of selected elements the author proposes to create a coefficient being a signal measure suitable for quick diagnosis of a failure.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 41-49
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda diagnozowania okrętowego tłokowego silnika spalinowego na podstawie analizy widmowej drgań skrętnych linii wałów
    Diagnostic Method of the Marine Diesels Engine Fuel Feed System Based on Spectral Analysis of Propulsion Shafts Torsional Vibrations
    Autorzy:
    Bruski, S.
    Korczewski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/360202.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    diagnostyka
    silnik okrętowy
    układ zasilania paliwem
    drgania skrętne
    analiza widmowa
    EXPLO-SHIP 2004
    diagnosis
    marine diesel engine
    fuel feed system
    torsional vibrations
    spectrum analysis
    Opis:
    Przedstawiono wytypowane wyniki pomiarów drgań skrętnych linii wałów napędzanych przez średnioobrotowy silnik spalinowy typu Sulzer serii AL. Celem badania było sprawdzenie możliwości diagnozowania tłokowego silnika spalinowego zespołu napędowego okrętu na podstawie analizy widmowej drgań skrętnych linii wałów. W wyniku przeprowadzonych badań zaproponowano przyjęcie nowej miary diagnostycznej przydatnej w ocenie stanu technicznego silnika.
    The paper presents selected results of torsional vibration measurements of propulsion shafts driven by a medium-speed Sulzer-made marine diesel engine of AL type. The research aimed to find out whether it is possible to diagnose failures of the fuel feed system by means of torsional vibration spectral analysis. The research resulted in the authors' proposal of a new diagnostic measure.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 81-88
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possible use of combined Diesel engine / steam turbine systems in ship power plants
    Możliwości zastosowania układów kombinowanych: silnik Diesla – turbina parowa w siłowniach okrętowych
    Autorzy:
    Olszewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/360519.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    siłownie okrętowe
    układy kombinowane
    tłokowy silnik spalinowy
    turbina gazowa
    turbina parowa
    ship power plants
    combined systems
    piston internal combustion engine
    gas turbin
    steam turbine
    Opis:
    The article presents a combined system of a large power ship power plant. The system consists of a piston internal combustion engine and the steam turbine system which utilises the energy transported with the exhaust gas leaving the internal combustion engine. The analysed variant of the combined cycle includes a Diesel engine and a steam turbine with a single-pressure waste-heat boiler. The numerical calculations were performed for two low-speed internal combustion engines made by Wärtsilä and MAN Diesel & Turbo, each of an approximate power output of 54 MW. The assumptions and limits which were used in the calculations done using a specially worked out code are included. The energy optimisation of the entire combined ship power plant was done taking into account only the thermodynamic point of view, leaving aside the technical and economic aspects.
    W artykule przedstawiono układ kombinowany siłowni okrętowej dużej mocy. Składa się on z silnika spalinowego tłokowego i skojarzonego z nim układu turbiny parowej, wykorzystującego energię zawartą w spalinach wylotowych silnika spalinowego. Rozpatrzono tylko wariant obiegu kombinowanego silnik Diesla – turbina parowa, z kotłem utylizacyjnym jednociśnieniowym. Podano założenia i ograniczenia oraz wyniki ob-liczeń rozpatrywanego układu z opracowanego programu komputerowego. Optymalizację energetyczną całej kombinowanej siłowni okrętowej przeprowadzono tylko z punktu termodynamicznego. Nie zajmowano się analizą techniczno-ekonomiczną. Obliczenia numeryczne wykonano dla silników spalinowych wolnoobrotowych firmy Wärtsilä oraz MAN Diesel & Turbo o mocy około 54 MW.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 88-94
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation study on the Influence of EEDI requirements to shiphandling in heavy weather
    Autorzy:
    Nishizaki, C.
    Okazaki, T.
    Yabuki, H.
    Yoshimura, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/116458.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    ship handling
    Energy Efficiency Design Index (EEDI)
    CO2
    heavy weather
    main engine
    Energy Efficiency Operational Index (EEOI)
    Maritime Environmental Protection Committee (MEPC)
    Pure Car Carrier (PCC)
    Opis:
    In order to reduce the CO2 emission from ships, International Maritime Organization executes the restriction of Energy Efficiency Design Index (EEDI) which limits amount of CO2 when freight of one ton is carried at one mile. Although the realization of higher efficiency of main engine without reduction of engine output is the best solution, it might be impossible. To comply with the EEDI requirements, it is assumed that the ship’s engine power becomes smaller than the existing ship by means of improving the ship propulsive efficiency. However, shiphandling in rough seas is expected to become difficult when the engine power is reduced. In this paper it is shown that the influence of the degraded main engine exerts on the safety of shiphandling in heavy weather based on the simulation study. In these experiments, both the simulation model that decreased engine power corresponding to EEDI requirement and that with the conventional engine power were tested, and masters in active service maneuvered the test ships in the rough seas.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 855-860
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Trendy rozwoju układów napędowych gazowców LNG
    Developments of Propulsion Systems of LNG Carriers
    Autorzy:
    Chądzyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/359459.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    LNG
    EXPLO-SHIP 2006
    ubytki ładunku
    układ napędowy
    układ ponownego skraplania
    turbina parowa
    silnik spalinowy dwupaliwowy
    boil-off
    propulsion system
    reliquefaction plant
    steam turbine
    dual fuel diesel engine
    Opis:
    Zdolności przewozowe światowej floty gazowców LNG rosną gwałtownie, a ilość zamówień na nowe statki wzrasta bardzo dynamicznie. Niewykluczone, że budowa gazowców LNG zostanie podjęta także w naszym kraju. W niniejszej pracy zostaną przedstawione wymagania, jakie stawiane są przed układem napędowym gazowca LNG, sposoby wykorzystania naturalnych ubytków LNG podczas rejsu, warianty możliwych do zastosowania układów napędowych wraz z ich cechami eksploatacyjnymi, szkic założeń do badań nad optymalnym rozwiązaniem układu napędowego w powiązaniu z wielkością statku.
    The global LNG shipping capacity is growing sharply and the number of ordered LNG carriers is very high at the moment. It is possible that Poland will appear among experienced builders of those ships. The author considers the requirements for propulsion systems of modern LNG carriers, the methods of utilising boil-off gas, different alternatives of power sources. Besides, the paper introduces a preliminary idea of research on an optimal solution of propulsion system closely related with the size of the vessel.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 139-150
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model matematyczny odprowadzania ciepła w instalacji chłodzenia wodą wolnoobrotowego silnika okrętowego
    A Mathematical Model for the Heat Exchange Process in a Low-Speed Diesel Engine
    Autorzy:
    Stachowiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/359704.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    modelowanie matematyczne
    instalacja chłodzenia wolnoobrotowego silnika okrętowego
    bilans energii
    symulacja komputerowa
    EXPLO-SHIP 2004
    mathematical modelling
    fresh water cooling system of a low-speed diesel engine
    energy balance
    computer simulation
    Opis:
    Przedstawiono matematyczny model procesu chłodzenia wolnoobrotowego silnika okrętowego realizowany przez instalację chłodzenia wodą słodką. Model matematyczny obejmuje zarówno stany pracy silnika ustalone, jak i nieustalone. Wykorzystując przedstawiony model, wykonano program symulacyjny prezentujący proces chłodzenia silnika.
    This paper presents a mathematical model for the heat exchange process in a fresh water-cooling system of a low-speed diesel engine. The model describes both stationary and dynamic engine operating conditions. The model is applied in simulation of the engine cooling process. Results of the simulation are discussed.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 479-488
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of top dead centre location based on the marine diesel engine indicator diagram analysis
    Autorzy:
    Varbanets, Roman
    Zalozh, Vitalii
    Shakhov, Anatoliy
    Savelieva, Iryna
    Piterska, Varvara
    Powiązania:
    https://bibliotekanauki.pl/articles/328708.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diesel engine
    top dead center
    TDC pickup sensor
    cylinder pressure monitoring
    mean indicated pressure
    indicated power
    ship energy efficiency coefficient
    silnik okrętowy
    silnik spalinowy
    czujnik ciśnienia
    monitorowanie
    średnie ciśnienie indykowane
    moc indykowana
    współczynnik efektywności energetycznej
    Opis:
    The article discusses methods for determining top dead center, based on the analysis of pressure diagrams of a marine engine. The advantages and disadvantages of different methods are shown. Diagnostics of marine engines during operation and the selection of optimal operating conditions is based on the analysis of gas pressure diagrams, as well as fuel supply and gas distribution diagrams. As a result of the analysis of the pressure diagrams, the indicator engine power is calculated, which is further used in the management of engine operation modes, in the calculation of specific indicators, as well as in the calculation of energy efficiency coefficients of marine vessels according to International Maritime Organization recommendations. The influence of the accuracy of determining the position of the top dead center on the calculation of the mean indicated pressure and indicator power is shown. The authors considered a method for determining top dead center, based on the solution of the equation P’= 0, which provides the required accuracy in calculating the mean indicated pressure and indicator power of the engine during operation. It is shown that the method can be applicable in marine engine working process monitoring systems as an alternative to hardware methods for determining the top dead center.
    Źródło:
    Diagnostyka; 2020, 21, 1; 51-60
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of the main engine power of a new container ship at the preliminary design stage
    Prognozowanie mocy napędu głównego nowego kontenerowca na wstępnym etapie prognozowania
    Autorzy:
    Cepowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/409685.pdf
    Data publikacji:
    2017
    Wydawca:
    STE GROUP
    Tematy:
    container ship
    design parameters
    preliminary design stage
    power
    main engine power
    length between perpendiculars
    number of containers
    TEU capacity
    design
    simple regression
    multiple regression
    approximation
    kontenerowce
    parametry projektowe
    wstępny etap projektowania
    moc
    moc napędu głównego
    długość pomiędzy pionami
    liczba kontenerów
    projektowanie
    regresja liniowa
    aproksymacja
    Opis:
    The paper presents mathematical relationships that allow us to forecast the estimated main engine power of new container ships, based on data concerning vessels built in 2005-2015. The presented approximations allow us to estimate the engine power based on the length between perpendiculars and the number of containers the ship will carry. The approximations were developed using simple linear regression and multivariate linear regression analysis. The presented relations have practical application for estimation of container ship engine power needed in preliminary parametric design of the ship. It follows from the above that the use of multiple linear regression to predict the main engine power of a container ship brings more accurate solutions than simple linear regression.
    W publikacji przedstawiono matematyczne zależności pozwalające na prognozowanie szacunkowej mocy napędu nowo budowanych kontenerowców w latach 2005-2015. Przedstawione aproksymacje pozwalają na oszacowanie mocy napędu w oparciu o długość między pionami i liczbę kontenerów. Aproksymacje zostały opracowane przy wykorzystaniu regresji liniowej jednej i wielu zmiennych. Przedstawione zależności mają praktyczne zastosowanie do szacowania mocy napędu kontenerowca dla potrzeb wstępnego parametrycznego projektowania statku. Z badań wynika, że zastosowanie regresji wielu zmiennych daje dokładniejsze rozwiązania niż zastosowanie regresji jednej zmiennej.
    Źródło:
    Management Systems in Production Engineering; 2017, 2 (25); 97-99
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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