Wyniki wyszukiwania - BazTech

1

Prediction of the main engine power of a new container ship at the preliminary design stage

Cepowski T.

Management Systems in Production Engineering

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2017

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nr 2 (25)

97--99

EN

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.

PL

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.

2

Estimation of seagoing ship's engine power based on distinguishing quantity parameter

Charchalis A., Krefft J.

Journal of KONES

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2010

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Vol. 17, No. 2

51-56

EN

The power of main engine must be determined in such a way to let the seagoing ship reaches the predicted, in the agreement with the ship owner, service speed. Significant influence on the main engine power, apart from the ship 's speed, has a geometry shape and the dimensions of the ship's hull. Begins from the general form of Admiralition's equation, it is essential to establish the specific quantity parameter for the estimation of main engine power. That parameter can be described by the displacement, DWT, LBT, TEU number, the 14 tons TEU number etc. depends on the type of the seagoing vessel. The estimation of the specified maximum continuous rating SMCR based on the quantity parameter can be practicable in the preliminary design stage because of the small number of the known design data and the importance of the design decisions made at that level. The characteristic quantity parameter to establish the main engine power of the seagoing ship has been determined using the data of the contemporary container ships in operation. The research has been done in the whole range of the container capacity in TEU, where the combustion, reciprocation engines are used to propel the seagoing vessels. The statistical and regression tools have been utilized in the data analysis process to determine the quantity parameter.

3

Estimation of main engine power of seagoing ship at preliminary design stage

Charchalis A., Krefft J.

Journal of KONES

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2010

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Vol. 17, No. 4

89-95

EN

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.

4

Zapotrzebowanie na moc napędu głównego statków pasażerskich - problemy doboru układu napędowego

Herdzik J.

Logistyka

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2009

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nr 6

CD-CD

PL

W artykule przedstawiono problemy szacowania mocy napędu głównego statków pasażerskich. Wskazano na istotne różnice zainstalowanych mocy dla podobnych statków. Występują istotne różnice (sięgające 100%) w zużyciu paliwa podobnych statków pływających na tej samej linii. Ze względu na wymagania komfortu pasażerów ogranicza się objętość zajmowaną przez siłownię, poszukując nowych rozwiązań. Ma to wpływ ma typ układu napędu głównego.

EN

This paper presents problems of main engine power estimation for passenger ships. It was shown the installed power differences for similar ships. The fuel consumption may differ up to 100% for similar ships on the same routes. It decreases the volume of machinery spaces, looking for new solutions due to the comfort demand for passengers. It has an effect on type of main propulsion.

5

The structure of main engine power installed on Polish fishing vessels operating from Polish ports

Rajewski P., Behrendt C.

Problemy Eksploatacji

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2008

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nr 1

215-219

EN

Scientists of the Institute of Technical Operation of Marine Power Plants, Maritime University of Szczecin, are doing research on "The fishing craft modernisation program for the reduction of power consumption and minimisation of environmental impact" funded by an EU grant. The first step to reach the final aim - the reduction of the adverse effects of fishing craft on the marine environment - was to identify the age/size structure and distribution of Polish fishing vessels' main engines. This has enabled the preparation of the range and method of record keeping of fishing vessels' power systems.

PL

W artykule wykorzystano informacje zebrane w czasie realizacji pracy badawczej "Program modernizacji jednostek rybackich w aspekcie zmniejszenia nakładów energetycznych i oddziaływania na środowisko" w ramach grantu UE. W artykule przedstawiono zebrane i opracowane materiały dotyczące struktury silników napędowych polskich jednostek rybackich, eksploatowanych w oparciu o polskie porty. Przeanalizowano zainstalowane moce napędu głównego w różnych grupach ich wielkości statków rybackich. Analiza była podstawą do opracowania "Karty ewidencji Jednostki".