摘要
建立了超临界CO2再压缩布雷顿循环模型,对基于超临界CO2再压缩布雷顿循环的塔式太阳能光热系统的吸热器效率、吸热面积、镜场面积、供能比率等参数和指标进行了研究。结果表明：布雷顿循环效率随着涡轮机入口温度的升高而提高;随着涡轮机入口温度的升高,吸热器效率降低,镜场效率提高,全厂效率呈现先上升再下降的趋势,在750℃左右达到最大;涡轮机入口温度从500到800℃,吸热器的吸热面积减小了21.7%,镜场面积也减小22.2%;基于超临界CO2循环的塔式太阳能光热系统在夏至日光热系统供能比率最高,能到达50%,在冬至日光热系统供能比率最低,只有27.4%,平均供能比率在39.7%左右;典型日的逐时吸热器和全厂效率是先升后降的曲线,夏至日白天的全厂平均效率略高于春分和秋分0.8个百分点;冬至日的效率低于春分和秋分5.5个百分点;4个典型日的平均效率在20.36%左右。
The supercritical CO2 recompression Brayton cycle model was established. The key parameters of solar power tower such as receiver efficiency, receiver area, heliostat field area, cost and solar energy supply ratio were studied. The results show that the Brayton cycle efficiency increases with the inlet temperature of the turbine. With the increase of the inlet temperature of the turbine, the receiver efficiency decreases and the heliostat field efficiency increases, and the efficiency of the whole plant increases first and then decreases, reaching the maximum efficiency at 750℃. With the turbine inlet temperature from 500℃ to 800℃, the receiver area reduced by 21.7%, the heliostat field area is also reduced by 22.2%. The solar energy supply ratio reaches highest（50%） at summer solstice, while at winter solstice is only 27.4%, and the average solar energy supply ratio is 39.7%. The average plant efficiency of summer solstice is slightly higher than that of the equinox by 0.8%. The efficiency of the winter solstice is lower than that of the equinox by 5.5%. The average efficiency of four typical days is about 20.36%.
作者
周昊
裘闰超
李亚威
ZHOU Hao;QIU Runchao;LI Yawei(State Key Laboratory of Clean Energy Utilization（Zhejiang University）,Hangzhou 310027,Zhejiang Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第15期4451-4458,共8页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(2015CB251501)~~
