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1 Journal of Polish CIMAC

1 2011

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Proposal of ecological propulsion plant for LNG carriers supplying liquefied natural gas to Świnoujście terminal

Cwilewicz R., Górski Z.

Journal of Polish CIMAC

2011

Vol. 6, no 1

25-32

The liquefied natural gas should be delivered to Świnoujście terminal by the biggest and the most modern ships. Ships should be operated by Polish owners. Cargo capacity of these ships is limited by depth of waterway on Świnoujście terminal entry. The largest recently built LNG carriers with cargo capacity 250000 m3 have drought about 12m which corresponds to waterway depth. The propulsion plants of such a ships should be fuelled by natural gas witch is considered to be an “ecological fuel”. The natural gas is widely used in onshore energetic plants however in marine applications the heavy fuel oil is still dominating. It is the result of problems in adaptation of marine diesel engines to burn natural gas. That is why LNG carriers should be equipped with combined propulsion plant COGES (Combined Gas Turbine and Steam Turbine Integrated Electric Drive System) made up of gas turbines burning natural gas from boiled off cargo and thermodynamically connected steam turbine. Such a propulsion plant is successfully competing in efficiency with conventional diesel engines fuelled with heavy fuel oil.