太阳能聚光分频PV/T综合利用系统的光学分析

Optical Analysis for a Solar Concentrating PV/T Hybrid System with Beam Splitter

本文提出了一种改进的太阳能聚光分频光伏光热综合利用系统。聚光系统为倾斜平板菲涅尔反射型聚光器并对太阳双轴跟踪。分频器可将太阳光谱分成两部分同时实现光伏和光热高效利用。通过光线追踪法对该系统进行了光学性能分析,并对系统的结构参数进行优化。结果表明聚光系统具有较高的面积利用率,聚光焦斑均匀性高有利于光伏发电;集热器对分频器反射能流的直接拦截率可达到86%。光热利用温度不受光伏电池工作温度的限制,因此有望获得更高的太阳能综合利用率。

A modified solar concentrating PV/Thermal(CPV/T) hybrid system with beam splitter was proposed.The concentrator is a linear Fresnel reflector concentrator utilizing sloped panels and driven by a dual-axis tracking system.The spectral beam splitter can separate solar spectrum into two parts and make the photovoltaic(PV) conversion and the photo-thermal conversion efficiency.The optical performances of the hybrid system were analyzed using ray tracing method,and the system structure parameters were optimized.The results show that the concentrator has a high aperture utilization ratio and a uniform concentrated radiation distribution on the PV devices.The reflected solar radiation interception ratio of the thermal receiver is up to 86%.The operating temperature of the thermal receiver is independent of the operating temperature of solar cells,and thus,the proposed system is promising for solar utilization with a high efficiency.