Design and Fabrication of Composite Solar Concentrator
The solar concentrator is the primary means of solving the contradiction between cost and photoelectric conversion efficiency. The design and fabrication of concentrator are the key techniques to accelerate the application of photovoltaic systems. A novel type of composite concentrator is designed, including two mirrors and one planar lens. The primary mirror focuses the sunlight on the secondary condenser, which is one multi-segmented cone mirror to produce homogenization on the solar cell. The selection strategy of structure parameters is analyzed by the numerical calculation methods. The concentration ratio and homogenization on the receiving surface are also obtained using the optical simulation method. The designed mirrors are fabricated by the ultra-precision turning method, and then assembled according to the location parameters designed. The proposed methods are proved to be satisfied with the solar application efficiently by the experiments.
Jianhong Zhao, Masanori Kunieda, Guilin Yang and Xue-Ming Yuan
Y. Cheng et al., "Design and Fabrication of Composite Solar Concentrator", Key Engineering Materials, Vols. 447-448, pp. 366-370, 2010