Study on Effects of Compressor Inlet Air Cooling on GTCC System Performance Under Different Environmental Conditions

Duan Liqiang, Guo Yaofei, Pan Pan, Li Yongxia
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引用次数: 1

Abstract

The environmental conditions (air temperature and relative humidity) have a great impact on the power and efficiency of gas turbine combined cycle (GTCC) system. Using the intake air cooling technology can greatly improve the performance of GTCC system. On the base of the PG9351FA gas turbine combined cycle system, this article builds the models of both the GTCC system and a typical lithium bromide absorption refrigeration system using Aspen Plus software. The effects of compressor inlet air cooling with different environmental conditions on the GTCC system performance are studied. The research results show that using the inlet air cooling technology can obviously increase the output powers of both the gas turbine and the combined cycle power. When the ambient humidity is low, the efficiency of GTCC changes gently; while the ambient humidity is high, the GTCC system efficiency will decline substantially when water in the air is condensed and removed with the progress of cooling process. At the same ambient temperature, when the relative humidity of the environment is equal to 20%, the gas turbine output power is increased by 35.64 MW, with an increase of 16.32%, and the combined cycle output power is increased by 39.57 MW, with an increase of 11.34%. At an ambient temperature of 35°C, for every 2.5 °C drop in the compressor inlet air, the thermal efficiency of the gas turbine increases by 0.189% compared to before cooling.
不同环境条件下压缩机进气冷却对GTCC系统性能影响的研究
环境条件(空气温度和相对湿度)对燃气轮机联合循环(GTCC)系统的功率和效率影响很大。采用进气冷却技术可以大大提高GTCC系统的性能。本文以PG9351FA燃气轮机联合循环系统为基础,利用Aspen Plus软件建立了GTCC系统和典型溴化锂吸收式制冷系统的模型。研究了不同环境条件下压缩机进气冷却对GTCC系统性能的影响。研究结果表明,采用进气冷却技术可以明显提高燃气轮机的输出功率和联合循环功率。当环境湿度较低时,GTCC效率变化平缓;当环境湿度较高时,随着冷却过程的进行,空气中的水分被冷凝并去除,GTCC系统效率将大幅下降。在相同环境温度下,当环境相对湿度为20%时,燃气轮机输出功率增加35.64 MW,增幅为16.32%,联合循环输出功率增加39.57 MW,增幅为11.34%。在环境温度为35℃时,压缩机进气温度每降低2.5℃,燃气轮机热效率比冷却前提高0.189%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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