【作者】

Lars Ryberg Juliussen

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC世界大会上发表，论文的版权归CIMAC所有。 After years of research and development as well as valuable experiences gained on test beds, the ready-to-apply concept of the ME-GI engine has now reached its maturity by being installed and operating on several commercial vessels. The ME-GI engine is a low-speed, two-stroke, dual-fuel engine that when acting as main propulsion in LNG carriers, can consume natural gas, boil off gas or fuel-oil at any ratio, depending on the energy source available on board. In close cooperation with HHI-EMD and other MDT’s partners, multiple test campaigns on various research platforms have been conducted, and from challenges and lessons learned proved that the ME-GI concept is safe, matured and cost efficient. In the current paper, the verification of the optimised ME-GI engine design, functionality, performance and reliability as well as the validation of the gas supply and auxiliary systems on board LNG vessels, are presented. Confirmed from previous testing campaigns, engine fuel efficiency of the ME-GI engine has been improved when changing from oil to gas at comparable engine operating conditions, here among the optimised pilot fuel oil consumption as well as the specific dual fuel (SDF) operation. The latest ME-GI results from service experiences are presented and thereby, the ME-GI engine operational features anticipates to offer efficient ship propulsion with low emission values, in which current emission legislation as well as improvement of the energy efficiency design. Moreover, continuous optimisation during development work has secured a user friendly design of the gas components. Production support has issued new, updated installation guides, recommendations and design specifications as well as special tools in order to facilitate successful installation and operation in service. Equally, essential knowledge obtained from extensive testing in close cooperation between MDT and partners, has improved the ready-to-apply solutions for gas supply systems and auxiliary equipment, e.g. reliability and efficiency for cryogenic pumps, compressors, Gas Valve Train (GVT), which aims to add to the cost efficient benefits of the MEGI concept. Based on the well-proven ME Engine Control System (ME ECS), which holds the overall responsibility of safe gas operation in the engine room as well as a complete monitoring of all major safety aspects, it is anticipated that future service experiences onboard LNG carriers will verify this unique safety feature and will be discussed further in details in the present paper. The overall conclusion from the ME-GI service experience on board LNG Carries are presented, which highlights the lessons learned and support the above mentioned features of the ME-GI concept.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

返回