Loop thermosyphon performance study for solar cells cooling

The loop thermosyphon was used in the heat dissipation of concentrating solar cells, to solve the problem of the high temperature of solar cells and their low efficiency. In this paper, a loop thermosyphon heat exchanger was designed and the effect of working fluid on heat transfer performance of loop thermosyphon was studied through experiments and the best working fluid was selected. The results show that the heat transfer effect of acetone as the working medium is better than that of water and ethanol. Acetone loop thermosyphon can be used for 7 times concentrating photovoltaic cells cooling, while the ethanol loop thermosyphon can be used for 3 times and the water loop thermosyphon only used for 1 time. The heat transfer characteristics of the fin with natural convection were studied by numerical calculation, and the fin structure was optimized. The influencing factors were analyzed by orthogonal analysis. (C) 2016 Published by Elsevier Ltd.