The high solar light concentration onto the photovoltaic cell leads to extremely high cell temperature, whichsignificantly decreases the cell efficiency and degrades its lifetime due to the thermal stresses. One of the mainchallenges of these types of solar cells is to propose an efficient cooling technique that allows the cells to operateunder its recommended operating conditions. Therefore, the focus of this study was to develop a comprehensivethree-dimensional model for the high concentrator photovoltaic/thermal (HCPV/T) system. This model com-prises a thermal model for a triple-junction solar cell integrated with a thermo-fluid model for four distinctdesigns of confined jet impingement heat sinks. The results showed that the cell electrical efficiency increasedwith the coolantflow rate, and sufficient temperature uniformity can be achieved by the jet impingementconfigurations. Additionally, the use of jet impingement configurations consumed a slight pumping power lessthan 1% of the generated power in the solar cell. The maximum local temperature of uncooled solar cell waspredicted to reach 1360 °C under solar concentration ratio of 1000 Suns. Under the same conditions, the singlejet design reduced the maximum local temperature to about 65 °C with coolant massflow rate of 50 g/min. Itshould be noted that the thermal stress substantially decreased with the increasing coolant massflow rate.Exergetic analysis showed that the single jet design attained the maximum total exergy efficiency of 53.25% attheflow rate of 25 g/min.
