【作者】

Keita Kawase

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。In an effort to better protect the environment more stringent regulations are to be applied to marine exhaust emissions, with the IMO not only implementing their NOx Tier III requirements in Emission Control Areas from 2016 but also placing a global cap on SOx in all waters from 2020 or 2025. In order to satisfy these regulations in diesel engines fuel changes or ancillary systems must be employed, such as the SCR after-treatment system for NOx reduction and a scrubber system or low-sulphur fuel for SOx reduction. As a result operating costs for the vessels increases. On the other hand, the lean-burn combustion technology of natural gas has the sizable advantage that NOx, SOx, CO2 and PM can all be reduced at once. With increases in shale gas production also signalling a further decline in the market price of LNG, now more than ever are marine engines fuelled by natural gases, with their low environmental impact, attracting attention. In order to meet these market demands, Daihatsu Diesel Mfg. Co., Ltd. has developed a dual-fuel engine, the “DE28DF”. The DE28DF was developed according to the following concepts: - To satisfy the levels of reliability necessary for marine use; - To conform to the IGF code for inherently gas safe machinery spaces; - To comply with IMO NOx Tier III when in gas operation mode and Tier II in diesel operation mode; - To be able to change the operation mode from diesel to gas and vice versa without fluctuations in engine speed and load; and - To be acceptable for transient operation considering marine use on both diesel and gas operation mode. After addressing the above requirements the DE28DF underwent a type approval and NOx testing by classification societies in October 2014. It has now received the certificates for both tests. This paper describes the details of the engine structure and control system; its reliability and safety as required for marine engines; the engine performance and addressing of practical applications in LNG fuelled vessels.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

5

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