塔式电站中定日镜尺寸的选择

Discussion on Selecting the Size of Heliostats for Solar Power Tower Plants

定日镜是塔式电站中最基本的聚光单元,也是电站中花费成本最大的部分。由于定日镜镜面尺寸的大小直接决定了定日镜的结构设计和生产成本,也决定了电站中定日镜总数目和定日镜场的大小以及定日镜的跟踪控制及维修。因此,针对商业化运行塔式电站中的定日镜进行研究,从技术和经济的角度,探讨了塔式电站中采用小尺寸定日镜和大尺寸定日镜的利弊,可为塔式电站定日镜尺寸的选取提供依据。

Heliostats are the main elements of the collector subsystem,which represent 40% to 50% of the capital cost of a solar power tower plant. For the size of heliostat is a decisive factor in itsstructural design and manufacture,as a result,influences quite much the total number,tracking,control and maintenance of heliostats,therefore,it is crucial in the system design of the solar power tower plant. In this paper,the heliostats in commercial solar power tower plants were investigated,and the advantages and disadvantages of large size heliostats and small size heliostats were discussed from the technical and economical views.