To address the issue of reduced electrical efficiency caused by uneven surface temperatures of solar cells in high concentration photovoltaic （HCPV） systems, a manifold microchannel heat sink with an array of inclined ribs is proposed to reduce the temperature difference on the surface of the solar cells. Computational fluid dynamics （CFD） is used to simulate and analyze the impact of different rib inclination angles on the heat dissipation performance of the manifold microchannel. The results show that compared with the structure without ribs, the temperature difference on the battery surface is significantly reduced when the inclination angle of the ribs in the inlet manifold is 11.54°. The maximum reduction rate is 61.86% under various flow rates. Under high flow conditions, the maximum temperature on the battery surface is reduced by 11.90 K, and the PEC range under various flow rates is 1.06 to 1.13.

solar concentrator  /  solar cells  /  microchannels  /  forced convection  /  rib array  /  temperature difference