Wyniki wyszukiwania - BazTech

1

Average fuel consumption by a ship on a sales line in statistical weather conditions

Szelangiewicz T., Żelazny K.

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

573--579

EN

During operation of the ship, fuel consumption and associated emissions are very important for economic and ecological reasons. The fuel consumption is greatly influenced by the choice of shipping route, weather conditions on these routes and engine control criteria. The article presents its own algorithm for forecasting ship operation parameters, including fuel consumption on selected shipping routes for average, statistical (seasonal) weather parameters occurring on these routes. It shows what factors have the main impact on fuel consumption and how you can affect fuel consumption during the cruise in changing weather conditions.

2

Estimation of hull’s resistance at preliminary phase of designing

Charchalis A.

Journal of KONES

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2017

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Vol. 24, No. 1

77--82

EN

In this paper are presented the methodology of calculation of hull resistance components, principal parameters of a vessel, necessary for calculation of displacement in relation to vessel’s type. That methodology concerns analysis of designing ways at early stage of ship’s power calculation. Ship owners' preliminary assumptions for new ship consist of deadweight (for container vessel load capacity TEU), speed shipping line and others. Taking it as a base, in early stage of design one has to select propulsion type. This goal needs definition of principal dimensions of a vessel, which are the base for further calculations of hull’s resistance and evaluation of necessary power of main engine (engines) to fulfil shipping requirements. In the paper, are presented major constraints for designing of new vessels coming from ship-owner assumptions such as seafaring limitations and safety of shipping regulations due to Classification Societies Rules or coming out from designing experience. In the paper are presented components of ship’s resistance and methods of total resistance calculations what is a basis for power calculation and propulsion designing. Moreover, are presented results of calculations of resistance components of different types of ships, and variety of displacement and sailing velocity. It has to be assumed, that presented method concerns preliminary design stage and can vary from different ships classes and constructions of hulls.

3

Assessment of underpowered propulsion machinery in electrically driven small inland waterway passenger ships from classification society point of view

Dymarski C., Narewski M.

Journal of Polish CIMAC

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2014

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Vol. 9, no 1

7--16

EN

Paper presents short operational and engineering analysis of underpowered propulsion in small electrically propelled small inland passenger ships. There is evidence that in certain weather conditions the phenomena of added aerodynamic resistance of small water crafts may have serious influence on their speed and manoeuvrability. Existing regulations like class societies rules for ship classification and construction or EU Directive 2006/87/EC do not provide any requirements or guidelines on prediction of air or hydrodynamic resistance or propulsion power computations to be assessed by third party in design process. In the opinion of authors , the case is particularly important when electrical or hybrid propulsion is considered as prime mover. Existing knowledge allows for engine ering analysis to be conducted to provide better knowledge on the selection and construction of innovative propulsion machinery for ships where passengers safety is major factor of concern by wate rways administration, class societies and insurance institutions.

4

Designing constraints in evaluation of ship propulsion power

Charchalis A.

Journal of KONES

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2013

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Vol. 20, No. 1

29--34

EN

Preliminary ship owners' assumptions for new ship consist of deadweight (for container vessel load capacity TEU), speed shipping line and others. Taking it as a base, in early stage of design one has to select propulsion type. This goal needs definition of principal dimensions of a vessel, which are the base for further calculations of hull’s resistance and evaluation of necessary power of main engine (engines) to fulfil shipping requirements. Selection of main dimensions of vessel is limited by rules regarding buoyancy, stability, hull strength, manoeuvring capability, and limitations related to seaways or harbours characteristic. In this paper is presented the methodology of calculation of principal parameters of a vessel, necessary for calculation of displacement in relation to vessel’s type, volumetric coefficients, Froude number, and others values affecting ship’s dimensions. It is about midship section coefficient, waterline coefficient, prismatic coefficients and hull feature and area coefficients. Those values are necessary for calculation of hull resistance. In the table are presented comparison of results of calculations above mentioned values and movement resistance and propulsion power of three container vessels representing different load capacity and one bulk carrier. There are also presented different calculation methods of transverse midship section coefficient and wet area coefficient, for 5000TEU container vessel.