全内反射型太阳能聚光模块设计与研究

Design and research of total-internal-reflection solar energy concentrating module

设计了用于太阳能聚集的全内反射(Total-internal-reflection,TIR)聚光器并采取措施进行优化,将多个TIR聚光器进行叠加放置在光波导板组成波导聚光模块。太阳光线经TIR聚光器阵列收集后照射到光波导板上并在其内部传播,由末端的光伏电池吸收。由实验结果可知,在光波导板长度为400 mm增至4 800 mm的过程中,光学效率由88.6%降低为40.2%,而辐照度由212 W/m2增长为980 W/m2。这样根据不同需求选取不同长度的光波导板,并在保证较高的输出功率的前提下大大减少所需使用的光伏电池面积,同时TIR聚光器只需水平放置在光波导板上,避免了透镜阵列与光波导板的严格对准要求,降低了制造与装配成本。

Total-internal-reflection（TIR） concentrator for solar concentration was designed, and a series of measures was adopted to optimize. Then lots of TIR concentrators was superimposed and assembled on the waveguide slab to form the waveguide concentrating module. Collected by the TIR concentrator array, the sun light incident on the waveguide slab continued to propagate in it, and was absorbed by the photovoltaic cells in the end. The experimental result shows that when the length of the waveguide slab increased from 400 mm to 4 800 mm, the optical efficiency decreased from 88.6% to 40.2%, while the irradiance concentration grew from 212 W/m2 to 980 W/m2. Thus different lengths of the waveguide slab can be selected according to different requirements. While getting the high output power, the area of photovoltaic cells used is decimated. At the same time, the TIR concentrator can be just placed on the waveguide slab, avoiding the demand of aligning strictly the lens array and the waveguide slab, which is convenient in installation and adjustment.