建筑整合式双焦点微型聚光器的设计与性能分析

设计了一种建筑整合式双焦点微型聚光器。光学模拟结果显示，在双焦点无交错式镜场布局下，聚光器的光学效率最高，外墙安装和屋顶安装的光学效率分别为62.5%和63.6%。集热性能测试结果显示，聚光器凭借追踪阳光和散热面积小的优势，相比平板集热器具有更高的集热效率。聚光器安装在屋顶时的日均集热效率为24.3%，安装在外墙时为22.0%，均比平板集热器高10%以上。在满足冬季用水温度的条件下，所设计的聚光器安装在外墙或屋顶时的集热效率均优于平板集热器。

Design and Performance of a Building-integrated Bifocal Micro-concentrator

A building-integrated bifocal micro-concentrator is designed.The optical simulation results show that the highest optical efficiency can be obtained by a bifocal non-staggered mirrors arrangement, which the daily average optical efficiency of the facade-mounted concentrator and roof-mounted concentrator are 62.5% and 63.6%, respectively.In addition, the experimental results show that the concentrator has higher thermal efficiency with the advantages of tracking sunlight and smaller heat dissipation area.The daily average thermal efficiency of the roof-mounted concentrator is 24.3%, and that of facades installation is 22.0%, which are more than 10% higher than that of the flat-plate collector.Under the condition of satisfying the water temperature in winter, it can be concluded that the thermal efficiency of concentrator is significantly better than that of commercial flat-plate solar collectors when installed on the roofs or facades.