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Tytuł:
Experimental analysis of the effectiveness of ship propulsion devices
Autorzy:
Abramowicz-Gerik, T.
Powiązania:
https://bibliotekanauki.pl/articles/320536.pdf
Data publikacji:
2008
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
napędy okrętowe
modelowanie
siły hydrodynamiczne
ship propulsion
modelling
hydrodynamic forces
Opis:
The paper presents the study on the effectiveness of ship propulsion devices based on model tests conducted in the open water experimental set up. The influence of the water depth to draft ratio and distance from the vertical tight wall on the hydrodynamic forces generated by the propellers on the ship hull was investigated. The interaction effects observed for the twin propeller ship in bollard pull condition were compared with the effects induced by single propeller vessels available in literature and discussed with respect to the mathematical modelling of hydrodynamic forces generated on the hull by ship propulsion devices.
Źródło:
Annual of Navigation; 2008, 13; 5-13
1640-8632
Pojawia się w:
Annual of Navigation
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:
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:
Reliability, availability, and maintainability analysis of the propulsion system of a fleet
Autorzy:
Bayraktar, Murat
Nuran, Mustafa
Powiązania:
https://bibliotekanauki.pl/articles/24202522.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
ship propulsion system
reliability
availability
maintainability
RWB software
RAM analysis
Opis:
New systems are produced and developed to meet specific needs, and their reliability is the most important issue. In the maritime industry, evaluating failures in a ship’s propulsion system results in high costs and the loss of prestige for the company. Land/sea fleet employees need to detect and minimize the failures that may occur in ship propulsion systems in advance to ensure the continuity of the ships’ operations. In this study, the recorded failure data of four different ships belonging to a fleet in the last 10 years are used. Failures were examined as a whole since the ships have similar propulsion systems. The obtained failure data were grouped, and the average time to fix the failures was determined by the chief engineer and made suitable for reliability, availability, and maintainability (RAM) analysis. A suitable model was created for grouped failures by Isograph’s RWB software. As a result of the analysis of the propulsion system and its subsystems, the main engine of the ship was shown to have the best reliability. Furthermore, the most important components were the cylinders of the main engine as subsystems. This study highlights the components that are important to the reliability of a propulsion system. Thanks to the RAM analysis, improvements can be pinpointed on a ship’s propulsion system, which will increase the operations of the maritime industry. Reducing failures will further increase the confidence in maritime transport and strengthen its place among the modes of transportation. This study provides a valuable resource for academicians, experts, as well as companies working on reliability, availability, and maintainability in the future.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 70 (142); 63--70
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economical analysis of selected variants of power plant for inland waterways passenger ship intended for operating on Berlin - Kaliningrad route
Autorzy:
Bocheński, D.
Powiązania:
https://bibliotekanauki.pl/articles/260439.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
inland waterways passenger ship
ship power plant
ship propulsion systems
Opis:
This paper contains an economical analysis of three selected variants of power plant for inland waterways passenger ship intended for operating on Berlin-Kaliningrad route. Purchase cost of elements of the ship’s energy system and fuel consumption cost were assumed as the assessment criterion for the analyzed variants of the ship’s power plant. The economical indices : Average Annual Cost (AAC) and Net Present Value (NPV) were taken into consideration.
Źródło:
Polish Maritime Research; 2006, S 2; 47-51
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two design concepts of power plant for an inland waterways passenger ship intended for operating on BERLIN – KALININGRAD route
Autorzy:
Bocheński, D.
Rudnicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/260447.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
inland waterways passenger ship
ship power plant
ship propulsion systems
Opis:
This paper presents two most probable design solutions of power plant for a two-segment passenger ship intended for operating on inland waterways of Poland, Germany and Russia. Preliminary designs of the main power plant to be installed on the pusher are presented, as well as requirements for the auxiliary power plant to be placed on the barge are outlined.
Źródło:
Polish Maritime Research; 2006, S 2; 52-56
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eksploatacyjna metoda analizy rozkładu obciążeń użytecznych silników napędu głównego statku
Effective Load Analysis Method of the Ship Main Propulsion Unit
Autorzy:
Borkowski, T.
Kowalak, P.
Kijewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/360565.pdf
Data publikacji:
2005
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
okrętowe wolnoobrotowe silniki wysokoprężne
główne napędy statków
eksploatacja statku
OMiUO 2005
marine slow speed diesel engines
ship propulsion
vessel maintenance
Opis:
Okrętowe wolnoobrotowe silniki wysokoprężne stanowią zdecydowaną większość głównych napędów dla statków handlowych. Instalowane są one w najprostszych układach napędowych, gdzie silnik jest bezpośrednio połączony ze śrubą. Taki układ zapewnia najwyższą sprawność i najniższe z możliwych zużycie paliwa. Warunkiem uzyskania najlepszych rezultatów w tym zakresie jest utrzymywanie w czasie eksploatacji statku określonych zasad eksploatacji głównego napędu statku. W artykule przedstawiono uproszczoną metodę analizy istotnych wskaźników pracy głównego układu napędowego statku. Metoda może być stosowana w eksploatacji silników wyposażonych w standardowe urządzenia pomiarowe.
The marine diesel engine today is the prime mover for ship propulsion. The most typical marine propulsion plant of modern merchant ships is a single, slow-speed turbocharged, two stroke diesel engine, directly coupled to the vessel's single, fixed or controllable pitch propeller. This configuration can provide high power outputs and improved fuel economy. The paper deals with basic ship propulsion factors used for fuel consumption calculations.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 5 (77); 121-130
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:
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:
Estimation of the Probability of Propulsion Loss by a Seagoing Ship Based on Expert Opinions
Autorzy:
Brandowski, A.
Frackowiak, W.
Powiązania:
https://bibliotekanauki.pl/articles/117585.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Probability
Propulsion Loss
estimation
seagoing ship
Expert Opinion
Hazard Analysis
Immediate Catastrophic Failure (ICF)
Risk Analysis
Opis:
The event of the loss of propulsion function has been defined as hazardous event to a seagoing ship. It has been formalized. The procedure of acquisition of expert opinions on frequency of the event occurrence has been described. It may be considered to be of a numerical-fuzzy character. The fuzzy part was transferred to the numerical form by the pair comparison method. An example of the ship propulsion system comprising a low speed internal combustion engine and a solid propeller illustrates the method presented. It may be used wherever a hazard analysis has to be performed of a system involving human and technical aspects and there is a shortage of objective data on the investigated object.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 449-454
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the probability of propulsion loss by a seagoing ship based on expert opinions
Autorzy:
Brandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/258638.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship
loss of propulsion
probability
estimation
expert
Opis:
The event of the loss of propulsion function has been defined as hazardous event to a seagoing ship. It has been formalized. The procedure of acquisition of expert opinions on frequency of the event occurrence has been described. It may be considered to be of a numerical-fuzzy character. The fuzzy part was transferred to the numerical form by the pair comparison method. An example of the ship propulsion system comprising a low speed internal combustion engine and a fix pitch propeller illustrates the method presented. It may be used wherever a hazard analysis has to be performed of a system involving human and technical aspects and there is a shortage of objective data on the investigated object.
Źródło:
Polish Maritime Research; 2009, 1; 73-77
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:
Determination of main dimensions and estimation of propulsion power of a ship
Autorzy:
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/244443.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship propulsion
Marine Power Plant
database
ship’ dimensions
Opis:
TEU number, which is the container ships’ crucial designing factor, directly influences the main hull dimensions such as displacement V , length L, breadth B, draught T, their combinations and block coefficient CB. The main dimensions have a great impact on developing the ships resistant performance. Thus, it is really fundamental to establish the correct dimensions of the hull during the design and ship building process. Estimating the shape of the ship’s hull, that comprises its main dimensions, is one of the basic tasks as part of the preliminary design stage. The most significant decisions determining ships performance, its duration and building costs are made at the beginning of the preliminary stage, when the costs are relatively low. It is important to limit the total ship resistance, for instance, by lowering the wave ship resistance as much as possible, especially when the operational speed and TEU number carried by one vessel is increasing. That resistance depends on the operational speed expressed by Froude number. The resistance criteria and the existing hull dimensions limits, resulting from ships route, must be taken into consideration bearing in mind safety conditions such as ships stability and seaworthiness, when the main ships dimensions are being determined. In the paper are presented general rules for calculations of ship’s hull principle dimensions and total power of engines of container ship 1300TEU and 18 kn at preliminary stage of design process.
Źródło:
Journal of KONES; 2014, 21, 2; 39-44
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosing elements of ship propulsion of vibration measurement
Autorzy:
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/243179.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diagnosing
vibroacoustics
gas turbine engines
ship propulsion plant Diagnosing
ship propulsion plant
Opis:
In the present time the technical progress make us use more and more complicated machines in our everyday life. In the case of the technology used at sea the necessity of highly specialised service is especially evident. The diagnostic systems elaborated to support the exploitation of the vessel power plant with gas turbines are presented in the paper. Application of computer simulation for diagnosing a technical state of gas turbines rotor sets should be applied during calculation and project process. During engine assembly, the rotating components are mounted with great care with the main objective of minimising shaft unbalance. However, even with the best of care, such factors as machining imperfection, differential thermal expansion etc cause a small residual unbalance of gas turbine rotor. The dynamic problems of Marine Gas Turbine Engines are connected with such basic elements as rotors, bearings, struts of bearings, engine body and type of substructure.
Źródło:
Journal of KONES; 2007, 14, 2; 81-89
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosing of ship propulsion elements by vibration measurement
Autorzy:
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/244654.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diagnosing
vibroacoustics
gas turbine engines
ship propulsion plantDiagnosing
ship propulsion plant
Opis:
In the present time the technical progress, make us use more and more complicated machines in our everyday life. The application of turbine engines as the main propulsion engines of a vessel impels, according to requirements, operation procedures. It alters considerably the usage of gas turbine engines in the navy from the ones in aviation. The relatively low load is characteristic to the operation of the marine engine. In the case of the technology used at sea, the necessity of highly specialized service is especially evident. In the paper, we present the diagnostic systems elaborated to support the exploitation of the vessel power plant with gas turbines. Application of computer simulation for diagnosing a technical state of gas turbines rotor sets should be applied during calculation and project process. During engine assembly, the rotating components are mounted with great care with the main objective of minimizing shaft unbalance. However, even with the best of care, such factors as machining imperfection, differential thermal expansion etc cause a small residual unbalance of gas turbine rotor. The dynamic problems of Marine Gas Turbine Engines are connected with such basic elements: rotors, bearings, struts of bearings, engine body and type of substructure. The proposed diagnostics method makes it possible to determine the limiting value of vibration symptoms .
Źródło:
Journal of KONES; 2011, 18, 1; 93-98
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
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