【作者】

Magnus Karlsson

【摘要】

论文已在中国上海举行的2013年CIMAC大会上发表，论文的版权归CIMAC所有。 The aim of this paper is to present how to achieve a reduction of fuel oil consumption and maintenance cost through carried out optimization of diesel engines. Further more the paper also will handle combustion related problems of Marpol Annex VI emission TIER I low NOx settings of Diesel Engines and Diesel Engine optimisation in general. All presented cases are real and are backed up with real combustion diagrams, measurements and calculations carried out during Performance & Energy Audits onboard Stolt Tankers vessels by the Author of this paper. The Author has as well attended several Factory Acceptance Tests for Diesel Engines. A’ diesel engine combustion analyzer instrument' is used when carrying out the performance tests of the diesel engines onboard vessels. Based on the results from the combustion diagrams achieved from the combustion analyzer and other relevant performance data's the diesel engines are optimized for improved performance. The work process in the combustion diagrams will be explained and also how the diagrams should look like to achieve the most efficient combustion. The paper will show examples of diesel alternator engines with Marpol TIER I Low NOx emission settings. The paper reveals that newly installed diesel engines on vessels optimized in compliance according to low NOx emission limitations can be poorly optimized and therefore in a state of combustion unbalance. The paper shows that it is possible to optimize these poor factory adjusted diesel alternator engines to achieve a more efficient combustion and thereby a reduced fuel oil consumption and maintenance cost and still com-ply with the low NOx emission limitations. One special case of wrongly designed diesel alternator engines incompliance with low NO, emission limitation installed on the new vessels in the fleet is presented. In connection to this special case an older diesel alternator engine was optimized to make it possible to compare the design of the fuel injection on the two engines. Further on there will be examples of optimization of older diesel engines that don't need to be in compliance with Marpol TIER I low NOx regulation, both a2-stroke main engine and a 4-stroke diesel alternator engine. The Author believes that the paper can be enlightening for both Ship Owners and Engine Makers.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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