Wyniki wyszukiwania - BazTech

1

Reliability, availability, and maintainability analysis of the propulsion system of a fleet

Bayraktar Murat, Nuran Mustafa

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2022

|

nr 70 (142)

63--70

EN

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.

2

Impact of propeller emergence on hull, propeller, engine, and fuel consumption performance in regular head waves

Ghaemi Mohammad Hossein, Zeraatgar Hamid

Polish Maritime Research

|

2022

|

nr 4

56--76

EN

In this study, the impact of propeller emergence on the performance of a ship (speed), propeller (thrust, torque, and RPM), a diesel engine (torque and RPM) and fuel consumption are analysed under severe sea conditions. The goal is to describe the variation in the system variables and fuel consumption rather than analysing the motion of the ship or the phenomenon of propeller ventilation in itself. A mathematical model of the hull, propeller, and engine interactions is developed in which the propeller emergence is included. The system parameters are set using model experiments, empirical formulae, and available data for the engine. The dynamic response of the system is examined in regular head waves under submerged and emerged conditions of the propeller. The pulsatility and the extent of variation of 20 selected variables for the coupled system of hull, propeller, and engine are elaborated using quantitative and qualitative terms and absolute and relative scales. The simulation begins with a ship moving on a straight path, in calm water, with a constant speed for the ship, propeller and engine under steady conditions. The ship then encounters regular head waves with a known time series of the total resistance of the ship in waves. Large motions of the ship create propeller emergence, which in turn reduces the propeller thrust and torque. This study shows that for a specific ship, the mean ship speed, shaft angular velocity, and engine power were slightly reduced in submerged conditions with respect to calm water. We compared the mean values of the variables to those in the emerged condition, and found that the shaft angular velocity was almost the same, the ship speed was considerably reduced, and the engine power significantly dropped with respect to calm water. The ratios of the amplitude of fluctuation to the mean (Amp/Mean) for the ship speed and angular velocity of the shaft under both conditions were considerable, while the Amp/Mean for the power delivered by the engine was extremely high. The outcomes of the study show the degree of influence of propeller emergence on these variables. We identify the extent of each change and categorise the variables into three main groups based on the results.

3

The analysis of overall ship fuel consumption in acceleration manoeuvre using hull-propeller-engine interaction principles and governor features

Zeraatgar Hamid, Ghaemi M. Hossein

Polish Maritime Research

|

2019

|

nr 1

162--163

EN

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.

4

Koncepcja symulatora nawigacyjnego planowania podróży z wykorzystaniem modelu neuronowego układu napędu statku

Rudzki K.

Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni

|

2017

|

Z. 32

84--90

PL

W artykule przedstawiono koncepcję symulatora nawigacyjnego planowania podróży, zbudowanego na bazie programu nawigacyjnego OpenCPN. Poprzez dodatkowy plug-in możliwości programu zostaną rozszerzone o moduł do planowania i symulacji trasy żeglugi z uwzględnieniem warunków meteorologicznych panujących na akwenie. Pozycja statku na potrzeby symulacji trasy będzie wyznaczana na podstawie przyjętego kursu zgodnie z zaplanowaną trasą oraz prędkości wyliczanej przez sztuczną sieć neuronową z uwzględnieniem warunków meteorologicznych.

EN

The article presents the concept of a navigation simulator for travel planning based on the OpenCPN navigation program. Through an additional plug-in the program capabilities will be extended with a module for planning and simulating shipping routes taking into account meteorological conditions on the basin. The position of the ship for the simulation of the route will be determined on the basis of the accepted course of the ship, according to the planned route and velocity calculated by the artificial neural network, taking into account the forecasted meteorological conditions.

5

Case Study on the Unavailability of a Ship Propulsion System under Aging Effects and Maintenance

Okazaki T.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2016

|

Vol. 10, no. 3

501--508

EN

Unavailability of a ship propulsion system under aging effects and proper maintenance is estimated using GO-FLOW. GO-FLOW is an effective software tool for the unavailability analysis of complex systems. Aging effects are incorporated into GO-FLOW using a time-dependent technique and assuming a linear aging model. The results show that the aging effects and improper maintenance can potentially increase the frequency of accidents due to a malfunction of the propulsion system by a factor of three.

6

An application of intuitionistic fuzzy analytic hierarchy process in ship system risk estimation

Nguyen H.

Journal of KONES

|

2016

|

Vol. 23, No. 3

365--372

EN

In this paper, we extend the analytic hierarchy process (AHP) method and the Atanassov’s intuitionistic fuzzy set (IFS) into the intuitionistic fuzzy analytic hierarchy process (IFAHP) with application in ship system risk estimation. In the safety engineering, risk estimation is in practice confronted with difficulties connected with shortage of data. In such cases, we have to rely on subjective estimations made by persons with practical knowledge in the field of interest, i.e. experts. However, in some realistic situations, the decision makers might be reluctant or unable to assign the crisp evaluation values to the comparison judgments due to his/her limited knowledge. In other words, there is a certain degree of hesitancy in human cognition and his judgment. Taking advantages of IFSs in dealing with ambiguity and uncertainty into account, the IFAHP can be used to handle with the subjective preferences of experts, who may have insufficient knowledge of the problem domain or uncertainty in assigning the evaluation values to the objects considered. This paper also develops a new knowledge-based ranking method to derive the priority vector of the hierarchy. An illustrative example of the propulsion risk estimation of container carriers operating on the North Atlantic line is given to show the applicability and effectiveness of the proposed method.

7

A comparative components importance analysis of a complex technical system with the use of different importance measures

Chybowski L., Idziaszczyk D., Wiśnicki B.

Systemy Wspomagania w Inżynierii Produkcji

|

2014

|

z. 1 (7)

23--33

EN

This paper presents a components importance analysis of a complex technical system with the use of selected reliability components importance measures. The analysis was carried out on a propeller shaft stern tube seal of a ship propulsion system. The reliability structure of the analyzed system was modeled by means of the fault tree. For given system components the following were determined: the Birnbaum’s reliability and structural importance measure, reliability improvement potential, criticality measure and Vesely-Fussell’s measure. A transformation of measures based on rescaling their values has been proposed to simplify the comparative analysis using different measures with reference to the same system components. A transformation process for the analyzed system has been presented together with a results visualization of comparative components importance analysis by means of 3D bar charts and radar charts for a data series determined as system components and importance measures. Comments on the proposed methodology have been presented and other ways of its application have been indicated.

PL

W artykule przedstawiono analizę ważności elementów złożonego systemu technicznego z wykorzystaniem wybranych niezawodnościowych miar ważności elementów. Analizę przeprowadzono na przykładzie systemu smarowania i uszczelnienia pochwy wału śrubowego układu napędowego statku. Strukturę niezawodnościową analizowanego systemu zamodelowano z wykorzystaniem drzewa niezdatności. Dla poszczególnych elementów systemu wyznaczono niezawodnościową miarę ważności Birnbauma, miarę strukturalną Birnbauma, Potencjał przyrostu niezawodności, miarę krytyczności oraz miarę Veseley-Fussell’a, Zaproponowano transformację miar polegająca na przeskalowaniu ich wartości w celu ułatwienia analizy porównawczej wykorzystującej różne miary w odniesieniu do tych samych elementów systemu. Przedstawiono dla analizowanego systemu proces transformacji oraz zaprezentowano wizualizację wyników analizy porównawczej ważności elementów z wykorzystaniem wykresów słupkowych 3D oraz wykresów radarowych dla serii danych ustalonych jako elementy systemu oraz jako miary ważności. Przedstawiono uwagi dotyczące zaproponowanej metodyki i wskazano inne możliwe jej zastosowania.

8

The semi-Markov model of the process of appearance of sea-going ship propupsion system ability and inability states in application to determining the reliablity of these systems

Girtler J.

Polish Maritime Research

|

2013

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nr 4

18--24

EN

The article presents possible application of the theory of semi-Markov processes in creating the eight-state model of the process of appearance of the propulsion systems ability and inability states on sea-going vessels performing transportation tasks in a relatively long operating time t (t → ∞). The model has been proved to be able to be successfully used for determining the reliability of the abovementioned systems. The probability of faultless operation in time t was assumed the measure of system reliability. Operating situations of sea-going vessels were characterised, with special attention being paid to the fact that the loads of propulsion system components of these vessels are of random nature. These loads lead to damages which for this reason were also considered random events. It was also assumed that the damages provoke the appearance of states of inability of particular ship propulsion system components which means that these states are random events as well. The states of ability of a given ship propulsion system have been assumed to exist when all components of this system are in the state of ability. In case when at least one component is in the state of inability, the entire system is in the state of inability. Conditions were formulated for the reliability model of an arbitrary system to be able to be worked out in the form of the semi-Markov process. The need for the use of technical diagnostics in reliability examination of sea-going ship propulsion systems was indicated. In conclusions, certain qualities of the article were highlighted which are, in author’s opinion, of highest importance in reliability examination of sea-going ship propulsion systems.

9

A method for estimating propulsion risk of the ship casualty

Nguyen N.

Journal of KONES

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2013

|

Vol. 20, No. 2

315--321

EN

Loss of the propulsion function by a ship is one of the most serious categories of hazardous events in sea transport. In specific external conditions it may lead to a loss of ship and environmental pollution. The consequences of propulsion loss by a ship are events classified by the International Maritime Organization as casualties or incidents. The probabilities of occurrence of the former events in a specific time unit constitute the propulsion risk of a ship. Determination of these probabilities is in practice confronted with difficulties connected with shortage of data. A method for estimating the risk caused by loss of a seagoing ship propulsion function is proposed. The estimation is fully based on the expert judgments. Expert is assumed to be well acquainted with the subject he is expected to formulate his judgment on. Expert should also be capable of formulating his judgment. This is connected with level of his education and the language used in the elicitation process, particularly as regards the parameters the expert is expected to estimate. This may be the language of numerical or linguistic values. Numerical values are better but are more difficult to articulate - also errors in judgments are more likely. To overcome this problem and to obtain a more accurate estimation, this study suggests using an analytic hierarchy process (AHP), which quantifies the subjective judgments and confirms the consistency of collected data. An example of the propulsion risk estimation of container carriers operating on the North Atlantic line allows to assess effectiveness of the method.

10

Comparison of properties of marine Diesel engines run on two kinds of fuel using performance indicators

Adamkiewicz A., Deska P.

Zeszyty Naukowe / Akademia Morska w Szczecinie

|

2011

|

nr 28 (100) z. 1

5-13

EN

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.

PL

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.

11

Selection of measuring equipment in assembly process - analysis of selected elements

Jarysz-Kamińska E.

Diagnostyka

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2011

|

nr 3(59)

47-52

EN

The paper presents function of selection of measuring equipment - DWP function. Analysis of the individual elements of described the function can be used for isolation the most important measurement components of the selection of measuring equipment for selected measurement processes. The paper shows one chosen element of function of selection of measuring equipment - metrological characteristics. Those characteristics are shown on the example of chosen measuring equipment which is used in the alignment deviation measurements carried out during the assembly of elements of the ships propulsion system.

PL

W artykule przedstawiono funkcję doboru wyposażenia pomiarowego - funkcja DWP. Analiza poszczególnych elementów przedstawionej funkcji może służyć wyodrębnieniu najistotniejszych składników doboru wyposażenia pomiarowego dla wybranych zadań pomiarowych. W artykule zobrazowano jeden z elementów funkcji doboru wyposażenia pomiarowego - właściwości metrologiczne. Charakterystyki te przedstawiono na przykładzie wyposażenia pomiarowego wykorzystywanego w trakcie pomiarów odchyłki współosiowości realizowanych w trakcie montażu elementów okrętowego układu napędowego.

12

Sighting through as part of shaft alignment procedure

Jarysz-Kamińska E.

Diagnostyka

|

2010

|

nr 4(56)

65-68

EN

This paper presents chosen activities of the ships propulsion system shafting alignment procedure. The main focus in this paper was put on sighting through (bore sighting) which can be done with three different types of measurement equipment: piano were, optical instruments and laser instruments. The analysis of measurement equipment allows selection of most optimal measurement solution for company. The matter of this selection is to avoid hazard to the shaft line due to shafts misalignment. Presented in paper measuring techniques and measurement equipment which is being used for sighting trough the elements of ships propulsion system meet technological requirements requested by the client and by the ship classification society.

PL

W artykule przedstawiono zagadnienie procedury osiowania układu napędowego statku. Skoncentrowano się na ustawianiu bezpośrednim z wykorzystaniem trzech różnych przyrządów pomiarowych. Do pomiarów wykorzystano strunę stalową, urządzanie optyczne i urządzenie laserowe. Przedstawienie trzech różnych grup przyrządów pozwala na wybór najbardziej optymalnego rozwiązania dla przedsiębiorstwa. Istotą tego doboru jest uniknięcie zagrożenia dla linii wałów wynikającą z przekroczenia parametrów współosiowości. Omawiane techniki i przyrządy pomiarowe służące do bezpośredniego ustawiania elementów okrętowego układu napędowego spełniają wymagania technologiczne stawiane zarówno przez klienta jak i towarzystwa klasyfikacyjne.

13

Układ energetyczny z kotłem fluidalnym jako alternatywa dla współczesnych rozwiązań siłowni gazowców

Adamkiewicz A., Zeńczak W.

Rynek Energii

|

2009

|

nr 4

32-38

PL

W referacie omówiono genezę i rozwój układów napędowych statków do przewozu skroplonych gazów. Jednym z ważniejszych problemów eksploatacyjnych wpływających na koszty transportu gazu naturalnego w postaci skroplonej jest jego częściowe odparowywanie. Możliwe jest wykorzystanie odparowującego gazu do napędu statku lub też jego ponowne skraplanie co minimalizuje straty. Z tego względu główny akcent położono na układy napędowe statków do prze-wozu skroplonego gazu naturalnego. Pokazano wyniki analizy porównawczej sprawności energetycznych wybranych układów napędowych. Przedstawiono układ energetyczny z kotłem fluidalnym na węgiel, który może być brany pod uwagę w warunkach ograniczonego dostępu do paliwa produkowanego z ropy naftowej jako jedno z rozwiązań alternatywnych.

EN

This paper outlines the genesis and developments of propulsion systems of ships for carrying liquidized gases. One of the most exploitation problems with effect on transportation costs of natural gas in liquid form is its partially vaporization. It is possible to use the boiled gas for ship propulsion or its reliquidation what minimize the loses. With respect on this, main accent are put on ship propulsion system for carrying liquid natural gas. Results of comparative analysis of power efficiency of chosen ship propulsion systems have been shown. The power system with coal fluidized bed boiler as an alternative solution, which can be taken in to accounts in limited approach to fuel produced from crude oil are shown.

14

Analysis Of Ship Shaft Line Coupling Bolts Failure

Dymarski C., Narewski M.

Journal of Polish CIMAC

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2009

|

Vol. 4, no 2

33-40

EN

The ship propulsion shaft line is one of the most critical ship components having big influence on a ship safety. Because of that, there is well known need for proper shaft line survey either by ship crew, ship owner technical services as well as by classification society surveyors. One of the most dangerous and frequent kind of shaft line failures, especially on old ships, is a fatigue break of the collar coupling bolts. It usually causes the loss of the possibility to use the main propulsion system. In case of the bad weather and severe sea conditions it can lead even to the ship loss. The paper presents some data on failure statistics that was observed to shaft lines and propulsion system machinery. Furthermore, analyses of causes and generation mechanism of the mentioned fatigue breaks of the collar coupling bolts is presented.

15

Making Use Of Starting The Engine To Determine The Moment Of Inertia Of A Ship Propulsion System

Rosłanowski J.

Journal of Polish CIMAC

|

2007

|

Vol. 2, no 1

431-436

EN

The article presents the method of determining the moment of inertia of a ship propulsion system while starting the engine which is based on torque and rotational speed measurements . The ship propulsion system in which the measurements were taken consisted of a slow – speed propulsion engine , shafting and fixed pitch propeller . The measurements mentioned above allow determination of a dynamics equation of a ship propulsion system which served the basis for determination of the moment of inertia . The specified method of defining the moment of inertia of a propulsion system is applicable to measurements in transient motion of the engine . This method is distinguished by simplicity of calculations and possibility of defining the moment of inertia of a propeller together with the water accompanying and requires taking measurements in transient motion of a ship .

16

The development of specialized ship's propulsion systems with the aim of improving their manoeuvring ability in the aspect of navigation safety

Herdzik J.

Journal of KONES

|

2007

|

Vol. 14, No. 3

211-218

EN

The paper presents the development of specialized ship's propulsion system during last twenty years. It was shown some applied solutions of propulsion systems and what aims were achieved: improving of manoeuvring ability, the achievement ofpropulsion system's high efficiency in very large range from the idling to full load and the increasing of navigation safety. Ship propulsion systems are more often applied, especially for ships which operate on the sea in special ways and need: ship positioning, very high manoeuvring abilities, other ships services, self manoeuvring even for cruise ships. These propulsion systems are not needed applying the steering gears. These functions: steering and propulsion do thrusters, which in these cases are built in twin systems. It ensures possibilities of ship's propulsion (motion) keeping, even in case of failure in one propulsion system. For reason of sea traffic increasing, especially on sea area, when this traffic needs co-ordination (VTS stations), ship equipped in modern propulsion system should ensure greater navigation safety for herself and should decrease collision risk for other ships situated on this sea area. The usage high-performance and efficiency active powerplants is a key for the enlargement of the safety of sea shipping.

PL

W artykule przedstawiono rozwój układów napędowych specjalistycznych statków w okresie ostatnich dwudziestu lat. Podano stosowane rozwiązania oraz jakie cele udało się osiągnąć: zwiększenie zdolności manewrowych jednostek, uzyskanie wysokiej sprawności układów napędowych w szerokim zakresie obciążeń od biegu jałowego do obciążenia nominalnego oraz podniesienie bezpieczeństwa żeglugi. Układy napędowe z nowoczesnymi pędnikami są coraz powszechniej stosowane, szczególnie dla statków, które uprawiają nietypowążeglugę i wymagają: pozycjonowania jednostki, wysokich zdolności manewrowych, obsługi innych statków, samodzielnego manewrowania nawet w przypadku dużych statków pasażerskich. Układy te nie wymagają stosowania tradycyjnych maszyn sterowych. Funkcje sterowania i napędu jednostki spełniają pędniki, które z tego powodu budowane są minimum w układach podwójnych. W związku ze zwiększaniem się ruchu morskiego, szczególnie na akwenach, na których ruch ten wymaga koordynacji (stacji kierowania ruchem), statek posiadający nowoczesny układ napędowy będzie w stanie zapewnić bezpiecznążeglugę dla siebie i zmniejszyć zagrożenie kolizyjne w stosunku do wszystkich jednostek znajdujących się na danym akwenie. Stosowanie wysokosprawnych pędników aktywnych jest kluczem do zwiększenia bezpieczeństwa żeglugi.

17

A Model of Ship Propulsion Systems Operating Process

Girtler J.

Zeszyty Naukowe / Akademia Morska w Szczecinie

|

2004

|

nr 1 (73)

211-220

EN

The paper contains a formal description of ship propulsion systems operation process. The model of the process is presented in the form of two-dimensional stochastic process of which coordinates are semi-Markov processes of the final states set. The former process describes the process of changes in technical states of ship propulsion systems, the latter - the process of changes in their operating states. A monovariate model of ship propulsion systems operation process has also been proposed.

PL

Podano opis formalny procesu eksploatacji układów napędowych statków. Model tego procesu przedstawiono w formie dwuwymiarowego procesu, którego współrzędnymi są procesy semi-Markowa o skończonych zbiorach stanów. Jeden z tych procesów jest procesem zmian stanów technicznych układów napędowych a drugi - procesem zmian ich stanów eksploatacyjnych. Zaproponowano także jednowymiarowy model procesu eksploatacji układów napędowych statków.

18

Influence of gas turbine controller adjustment on ship propulsion system behavior in rough sea conditions. Part 2. The simulation investigations

Dzida M.

Polish Maritime Research

|

2004

|

nr 1

15-23

EN

The paper presents simulation investigations of influence of gas turbine controller adjuŹstment on ship propulsion system operating in heavy sea conditions, based on the model presented in Part 1 of the paper. The ship propulsion system with two gas turbines driŹving - through mechanical gear - ship controllable pitch propeller, described in Part 1, was used to analysis. The harmonic disturbances due to sea waves with selected frequencies were used as input function in computing the system’s amplitude characteristics at different settings of P and PD controllers.

19

An analysis 0f characteristics of ship gas turbine propulsion system (in the light of the requirements for ship operation in the Baltic Sea)

Domachowski Z., Dzida M.

Polish Maritime Research

|

2004

|

S 1

73-78

EN

The paper concerns a propulsion system of merchant ships intended for sailing in the Baltic Sea zone. Such system is to satisfy the ecological requirements determined by relevant international conventions for special zones to which the Baltic Sea also belongs. The paper draws attention to gas turbine used as a prime mover for such ships, because it satisfies the ecological requirements and has also other advantages. Application of gas turbine for ship powering does not require exhaust gas to be purified, however it requires fuel oils of a low sulphur content to be used. If the ecological rules impose the using of the fuel oils of similar quality for diesel engines then gas turbine propulsion system will be comparable - also economically (regarding specific fuel oil consumption cost) - with that of diesel engine. It would be even more favourable in a combine gas turbine /steam turbine system, especially at compound production of electric and heat energy (i.e. COGES systems). In the Baltic Sea zone gas turbines willfind application to powering a. o. such ships as : fast car-passenger ferries, fast cargo ships, special vehicles (hydrofoils, hovercraft, motor yachts).

20

Application of optimisation method in order to solve inverse design problem of Ship Propulsion System (SPS)

Kucharski T., Wójcik T.

Vibrations in Physical Systems

|

2002

|

Vol. 20

200--201