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Wyświetlanie 1-15 z 93
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:
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:
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:
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:
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:
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:
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:
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 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:
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 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:
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:
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:
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:
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
Wyświetlanie 1-15 z 93

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