基于烟气余热驱动喷射制冷的微型燃气轮机进气冷却系统

Theoretical analysis of micro gas turbine inlet gas cooling system based on jet refrigeration driven by waste heat

针对燃气轮机（燃机）出力随环境温度升高而下降的问题,可以通过冷却燃机进气的方法解决。对此,以C30型微型燃机（微燃机）为例,结合上海地区特点,提出了一种利用烟气余热驱动喷射制冷进行燃机进气冷却系统。通过计算分析结果表明,在环境温度、湿度较高的季节该系统能够较好地降低燃机进气温度,改善微燃机性能,夏季典型日可增加出力约15.3%,发电效率相对提高7.0%~9.4%。为微燃机进气冷却设计与运行提供参考依据。

The output and generating efficiency of gas turbine reduces with the increase of ambient tempera-ture,which can be solved through cooling the inlet gas.On this basis,this paper proposed a novel inlet gas cooling method,which uses an ejector refrigeration system driven by the exhaust gas heat from the micro-gas turbine.Calculation results show that,this system is available to reduce the inlet gas temperature and improve the performance of gas turbine in a high temperature and high humidity ambient.In Shanghai re-gion,the output power of the gas turbine can be increased by about 15.3% during a typical summer day. Correspondingly,the relative increase in power generation efficiency is up to 7.0% to 9.4%.This research can provide the references for design and operation of the micro gas turbine inlet air cooling system.