Journal
RENEWABLE ENERGY
Volume 133, Issue -, Pages 893-900Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2018.10.013
Keywords
Reflective high power concentration photovoltaic; Homogenization technology; Ray tracing method; Light funnel
Funding
- National High Technology Research and Development Program of China (863 Program) [2013AA050401]
- National Basic Research Program of China (973 Program) [2012CB626805]
- Excellent Team of Scientific Research in Lanzhou Jiaotong University [201703, 201705]
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The efficiency of GaAs solar cell was significantly reduced resulting from non-uniformity of energy flux density on receiver surface, and damage of solar cells was made by hot spots. In this paper, a light funnel is added between the concentrator and the receiver to improve the uniformity of energy flux density on receiver surface, which is designed according to the ray tracing method. The simulation result shows that the uniformity of the energy flux-density on the receiver surface is 92.26%, which agrees with the experimental result (94.64%). According to the maximum output efficiency of GaAs solar cell, the layout range of the cell is determined. The simulation results shown that the cell is arranged in the radius of 58 mm, which is similar to the experimental value (60 mm), and the effective area rate of the photoelectric conversion is 69.4%. At normal operation temperature (20 degrees C), the photoelectric conversion efficiency is 29.64%, and the total efficiency is about 83%. (C) 2018 Elsevier Ltd. All rights reserved.
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