
2015年第6期(总第210期)
doi :10. 3969/j. issn. 1009 3230.2015. 06.009
应用能源技术
41
基于CCHP系统燃机进气冷却改造的可行性分析
夏瑞青,王彦琳,付荣
(北京京能未来燃气热电有限公司,北京102209)
摘要:针对燃气蒸汽联合循环机组输出功率随环境温度升高而下降的问题,提出了一种对分布式CCHP系统低负荷运行制冷站改造的方法,将制冷站剩余容量用于燃气轮机进气冷却系统,并利用热水型澳化锂吸收式制冷机回收余热锅炉排烟余热制冷,以降低燃机进气温度。技术经济分析结果表明,该进气冷却系统具有明显的经济效益;温度变化对燃气轮机性能影响的分析表明,加片管式表面换热器的燃机进气冷却系统可使燃机进气温度下降15~ 20℃,进气冷却至15℃可使燃气轮机机组年净增发电量约35705MW·h。
关键词:燃气轮机;进气冷却;余热利用;澳化锂制冷机
中图分类号:TU831.37
3文章编号:10093230(2015)060041-06
文献标志码:B
Feasibility Analysis on Gas Turbine Inlet Air Cooling
ReconstructionaboutCCHPSystem
XIA Rui -qing, WANG Yan -lin, FU Rong
(The Future of Beijing Beijing Gas Power Co., Ltd. Beijing 102209, China)
Abstract: For the problem of Gas - Steam combined cycle unit output power decreasing at higher ambient temperatures, a reconstruction method of the distributed CCHP system lithium bromide refrigeration station running at low load is proposed, the remaining capacity of the cooling station is used for a gas turbine intake air cooling system. Hot water type lithium bromide absorption refrigerator use waste heat recovery of boiler flue gas lo reduces the gas turbine intake air temperature. Technical and economical analysis results indicate that the intake air cooling system has significant economic benefits. Analysis of the performance of the gas turbine affected by ambient temperature changes showed that, intake air cooling system allows the gas turbine intake air temperature dropped by 15 ~ 2o C using fin - tube heat exchanger, the gas turbine unit annual generating capacity increase about 35 705 MW · h when the intake air temperature is decreased by 15 °C .
Key words: Gas turbine; Intake Air Cooling; Waste heat utilization; Lithium bromide refrigerator
0
引言
天然气分布式能源是指利用天然气为燃料,通过冷热电三联供(CCHP)等方式实现能源的梯级利用,综合能源利用效率可以达到75%~ 90%。但在高温地区和炎热季节,燃气轮机性能深受环境温度的影响,出力严重下降,效率也随之
收稿日期:201505-10
0修订日期:20150527
作者简介:夏瑞青,京能未来燃气热电有限公司。万方数据
降低,机组调峰能力大大削弱]。环境温度升高,燃机进口空气密度下降,进气质量流量减小,致使吸人压气机的空气质量流量下降,机组的做功能力随之变小;压气机耗功与吸人空气温度成正比,即环境温度升高,燃气轮机净功减少。 CCHP系统夏季制冷多采用漠化锂吸收式冷机与电制冷的联合运行方式,保证夏季冷网的安全、稳定运行。其中,溴化锂吸收式制冷利用余热锅炉