【作者】

Christian Trapp;Andreas 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。: For years gas engines have been gaining importance within the global energy mix. One reason for that is the comparatively good, long term availability of natural gas, combined with highest efficiency potentials while meeting the most stringent worldwide emission standards. This makes large gas engines a clean technology for supplying electricity and heat around the globe as part of a decentralized energy concept. GE’s all new 10 MW range J920 Jenbacher gas engine is top of its class for electrical efficiency and designed for durability, simple installation, and maintainability. The engine consists of three modules,including a generator, engine, and turbocharger auxiliary module, that provide a high-quality, pre-fabricated,standardized generator-set module. Each module is factory-tested, then shipped separately and assembled on site, offering reduced installation time. In addition, the modules have highly standardized interfaces that work well with the balance of plant (BoP) systems, and ultimately simplify BoP installations and total plant erection time. Based on the extensive experience of GE’s type 6 gas engine combustion system,the J920 Jenbacher unit is equipped with an advanced pre-chamber combustion system with spark ignition and optimal conditions for longer part life. In addition, the individual gas mixing achieved by port injection in combination with cylinderspecific sensors allows each cylinder to be controlled to operate at optimal performance. The J920 mechanical structure is designed to allow high-peak firing pressure well above 200 bar. In combination with the latest early valve closing technology and the Jenbacher 2-stage turbocharging,the J920 Jenbacher gas engine achieves an electrical efficiency of up to 48.7%. GE’s 2-stage turbocharging concept for gas engines enables optimized miller technology high-power density and a large potential for high mixture temperatures allowing higher cooling water temperatures and with that making it an ideal fit for independent power production projects in hot ambient conditions. Combined heat and power (CHP) applications benefit from the use of mixture cooling heat at high temperatures to gain up to 90 % of overall efficiency. The J920 is equipped with the next generation of GE’s well-proven comprehensive Jenbacher gas engine management system with cutting edge cylinder individual balancing and optimization, adaptive condition-based controls, smart protection of core components and an intelligent limp home mode. This paper highlights the technology concept of the J 920 with special focus on combustion concepts and controls as well as the development strategy and validation result.

【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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