Abstract
The rapid rise in temperature of perovskite tandem solar cells under a high concentration ratio has introduced a huge decline in the efficiency of photoelectric conversion. To solve this problem, an array finned channel coupled jet heat sink has been designed. The ratio of height to diameter of the jet (H/d) on heat transfer, channel aspect ratio, pumping power, and other factors on heat transfer and flow characteristics are examined by the computational fluid dynamics and experimental methods. The results suggest that the trough micro-jet heat sink demonstrates better performance than the smooth cooled surface heat sink. The smaller the H/d, the better the heat transfer performance, and the larger the jet Reynolds number, the better the heat exchange effect. The key influence factor of pressure loss is the heat sink structure. With the increasing pumping power, the overall thermal resistance decreases, and the trend tends to be flatter when the pumping power exceeds 0.15 W. For constant Rea, the larger the input heat flux Q, the larger the energy efficiency ratio and the higher the utilization rate of energy.
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