【作者】

Carsten Rickert

【摘要】

该论文已在芬兰赫尔辛基举行的第28届CIMAC大会上发表。论文的版权归CIMAC所有。At Caterpillar Motoren GmbH in Kiel, Germany major emission reduction technologies have been investigated in the recent years. This will build a solid base for the development path towards IMO Tier 3 emission legislation. One ofmthese technologies is the exhaust gas recirculation, already established in passenger car and truck engines to reduce nitrogen oxide emissions of Diesel engines. However, deploying exhaust gas recirculation onto a medium speed Diesel engine for marine applications is not just copying existing concepts. The specific definition of nitrogen oxide emission limits inside and outside of the emission control areas as well as the compliance with different sulfur emission limits were the main drivers for a concept that is tailored to the needs of marine applications. Following a general concept selection phase a technology demonstrator engine was built at Caterpillar Motoren, based on the proven M32C Diesel engine. The chosen concept is highly flexible with regards to emission limits and fuel quality, thus enabling a cost optimized operation depending on shipping routes. To fulfill these criteria a new charge air path architecture was realized by rebuilding an existing IMO 2 compliant 6M32C Diesel engine in the lab. But not only the engine’s air path had to be redesigned completely. As one of the major principle penalties of exhaust gas recirculation is an increased smoke emission, also the fuel injection equipment had to be upgraded to the latest state-of-the-art technology. This gives the opportunity to optimize the combustion process to enable invisible smoke emission under all operating conditions. As a result, the lab engine is capable to fulfill IMO Tier 3 emission limits with activated exhaust gas recirculation by burning low sulfur MDO. The operation mode can be switched to an IMO Tier 2 compliant and cost optimized HFO burning operation mode outside the emission control areas. The following paper describes the concept architecture, summarizes the main test results of the lab engine and describes the positive aspects as well as the challenges of the chosen 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】

4

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