槽式太阳能热发电站的性能研究

STUDY ON PERFORMANCE OF THE PARABOLIC TROUGH SOLAR THERMAL POWER STATION

采用SAM软件对槽式太阳能热发电站进行模拟,研究了纬度、季节变换、太阳倍数、储热时长等因素对太阳能热发电站性能的影响。研究结果表明,纬度和季节变换对电站镜场余弦效率和光学效率有很大影响,纬度越高,电站镜场余弦效率和光学效率越低;夏季的余弦效率和光学效率最高,冬季最低。优化设计太阳倍数和储热时长,以获得最佳的聚光集热系统和储热系统配置,结果表明:对于装机容量为50 MW的太阳能热发电站而言,在太阳倍数为2.0、储热时长为15 h的组合下,可以获得较好的电站性能。

The parabolic trough solar thermal power station has been simulated by the SAM software,and the influences of the station latitude,changing seasons,Solar Multiple(SM) and full load hours of thermal energy storage(TES hours) on power station performance has been investigated comprehensively. The results show that the changing of latitudes and seasons has large influences on the power station heliostat field cosine efficiency and optical efficiency. Higher latitude leads to lower cosine efficiency and optical efficiency. Cosine efficiency and optical efficiency are highest in summer and lowest in winter respectively.Optimized SM and TES hours are necessary to obtain the best capacity design of solar field and thermal energy storage. In case of a 50 MW solar thermal power station,the combination of SM of 2.0 and TES hours of 15 hours leads to the best power performance.