【作者】

G. Tinschmann，A. Birgel

【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。 Large gas engines are gaining more and more importance within the global energy mix. The long-term availability of natural gas is comparatively secure and gas engine power plants are reaching high efficiency levels while meeting stringent emission limits worldwide as well as customer needs for matching electricit generation with demand. This makes large gas engines a clean technology for supplying electricity and heat around the globe as part of a decentralized energy concept. Emission legislation always drives technology, and there is a clear trend towards decreasing the emission limits for large combustion plants. For example, the European Union has issued the Industrial Emission Directive (IED) with a NO x limit for new gas engine plants of 75 mg/Nm 3 @ 15% O2 and 100 mg/Nm3 for CO. These limits have been inforce since 2011 and are mandatory for power plants with an energy input above 50 MW that consist of engines above 15 MW. Due to the IED and other emission legislation, it is necessary to decrease plant emissions. As a result, customers are requesting engines with lower NOx , CO and THC emissions. Up to date engines with 500 mg/Nm 3 NOx @ 5% O 2 dominate the market share, but it is likely that there will be a shift to low NOx engines. From the perspective of both technology and life cycle cost, there is always the question of what technology fits best. Consequently, this paper discusses the trade-off between emissions and engine performance and also highlights various technological approaches which are used to achieve the highestengine efficiency with the lowest possible engine-out emissions. The focus is on the design of the prechamber and the main combustion chamber, operational strategy and the turbocharging system including gas exchange. Finally, the engine-internal measures are compared with competing exhaust aftertreatment solutions.

【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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