【作者】

Susanne Kindt

【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。Since the last CIMAC meeting in Shanghai 2013, the number of gas-fuelled engine orders has grown to an unexpected level. More than 140 MAN B&W gas engine orders have been confirmed since the first firm order was received in December 2012. Not only for natural gas (LNG), but also for methanol, ethanol, and liquid volatile organic compound (LVOC). In combination with the general ongoing development of fuel equipment, this market situation has led to the introduction of a wide range of new fuel injection systems that did not exist before these gasified days. For example, our methane GI engine runs on 300 bar gas whereas the ethane version runs on 400 bar. Such a pressure increase means changes to the components. However, the fuel injection equipment for heavy fuel has also seen new development, such as the top controlled exhaust valve (TCEV) and our fuel booster injection valve (FBIV). For the methanol version our FBIV has been further developed, as methanol operation requires cooling and sealing oil. The TCEV and FBIV combination means that the traditional hydraulic cylinder unit (HCU) can be omitted. Besides the increasing focus on gas fuel engines, the focus on Tier III technologies has also increased. Exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) optimised for low-sulphur fuel operation are now our standard and are based on continuous development and market feedback. This development has resulted in downsizing of both EGR and SCR for our engines. Last but not least, new engines types have been added to our engine portfolio at the time of writing. In response to the market development towards further optimisation of engines for large containerships, the G90ME-C10.5 has been launched in addition to our already very competitive engine types S90ME-C9/10 and G95ME-C9. Furthermore, we have introduced the S50ME-C9.5 to our small bore engines programme. This paper describes these new engine types as well as the development in engine design for gas operation and Tier III compliance.

【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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