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首页> 外文会议>15th international conference amp; exhibition on liquefied natural gas (LNG 15): proceedings amp; committee reports >PROPULSION ALTERNATIVES FOR MODERN LNG CARRIERS
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PROPULSION ALTERNATIVES FOR MODERN LNG CARRIERS

机译：现代液化天然气运输船的推进替代品

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Certainly, the steam turbine driving LNG carrier has been ordered very seldom at present and other propulsion systems take the place of main engines for LNG carriers. New demands in LNG shipping industry and increasing concern about environmental protection are supposed to lead the trend toward an alternative propulsion application for LNG carriers other than steam turbine, which had dominated propulsion power generators onboard the vessels for decades.rnThe steam turbine has been acknowledged as a well-proven and reliable system, but not so efficient and quite complicated for operation. Thus the LNG shipping industry came to look for alternative ones, e.g. the diesel engine application that is common in the other fields of the shipping, and the latest developments in gas engines technology and gas handling machinery seem to satisfy the needs in the market. Furthermore, as the size of LNG carriers is getting bigger, alternative propulsion should be considered due to the practical limitation in steam turbine plant.rnThe feasible and already realized alternatives at the moment are the conventional 2-stroke slow speed diesel engine with re-liquefaction plant and the dual fuel 4-stroke diesel electric propulsion system. And, encouraged by the demands in the market, the gas turbine application and the gas injection 2-stroke diesel engine have been also evaluated in great detail.rnIn order to have more concrete idea about the alternatives, it is worth summarizing them technically and sharing what we have learned during evaluation of various propulsion alternatives at this stage.rnTotal 14 ships of slow speed diesel engines with re-liquefaction plant and 16 ships of dual fuel diesel electric propulsion are on order in Samsung Heavy Industries as of December 2006.
机译：当然，目前很少订购汽轮机驱动的LNG船，其他推进系统代替了LNG船的主机。液化天然气运输行业的新需求以及对环境保护的日益关注，有望导致替代蒸汽轮机以外的其他液化天然气运输船的替代推进应用的趋势。蒸汽轮机在船舶上的推进发电机中占主导地位数十年.rn一个久经考验且可靠的系统，但效率却不高，操作也相当复杂。因此，液化天然气运输业开始寻找替代方案，例如航运业其他领域中常见的柴油发动机应用以及天然气发动机技术和气体处理机械的最新发展似乎可以满足市场需求。此外，随着液化天然气运输船的尺寸越来越大，由于汽轮机厂的实际限制，应考虑采用替代推进技术。目前，可行且已经实现的替代方案是常规的具有再液化功能的二冲程慢速柴油发动机。工厂和双燃料四冲程柴油电动推进系统。并且，在市场需求的鼓舞下，还对燃气轮机的应用和喷油二冲程柴油机进行了详细评估。为了更详细地了解替代方案，值得在技术上进行总结并分享到2006年12月为止，三星重工业总共订购了14艘带再液化装置的慢速柴油发动机船和16艘双燃料柴油电力推进器。

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