【作者】

Udo Schlemmer-Kelling

【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。 Under the guidance of the International Maritime Organization (IMO) the emission levels for marine applications are regulated by MARPOL Annex VI. NOx, SOx and EEDI limits are in a steady process of tightening during time. The next stage of NOx emission reduction, the IMO Tier III emission limits, will be implemented from the 1st of January 2016 and will enforce significantly more stringent NOx emission targets for ECA areas. Apart from the lowered emission limits, the major driver for the engine development of marine applications is to maintain and possibly increase the engine efficiency. To reach both the emission and efficiency targets, the complexity of engine concepts has and will continue to increase. Depending on the engine size, application and region of operation, several solutions, including internal and external engine measures, are under investigation to comply with current and upcoming legislative regulations. While material and development costs for new technologies play a decisive role for manufacturers, for end users the consumables are an important cost factor. Conventionally, these are determined by the fuel costs and thus by engine efficiency. Meanwhile, however, the costs for emission reduction in terms of operating fluids take on an important role. In this study, operating cost optimized and reliable engine system concepts from the perspective of the end user shall be determined. This study is based on a medium speed Diesel engine application, operated completely in the ECA. The technical implications, financial aspects and advantages or disadvantages of the individual emission control concepts and technology packages are discussed. These include both engine internal and after treatment measures. The bore/stroke ratio and the piston speed are figures, which have to be defined carefully in the layout phase of the engine. Peak cylinder pressure, BMEP and displacement for a required power output are also important figures which have to be optimized. For the thermodynamic side the combustion process (fuel system), the gas exchange phase (air system) and the mechanical losses (friction) have to be considered. This investigation will start with state of the art engines as base line and will check several CO2 reduction regimes. The optimal combination of technologies from a point of view of investment cost, total cost of ownership, as well as operating costs is discussed. This presentation will give guidelines for OEM’s and customers as well to understand critical issues in the definition phase for future projects.

【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

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