Abstract
This paper proposes an innovative cooling technique that utilizes a loop heat pipe (LHP) and passive daytime radiative cooling. The proposed system uses LHP to move the heat load from the photovoltaic (PV) panel surface facing the Sun to a radiator surface where heat is radiated to the sky and dissipated to the surroundings by convection. The LHP allows heat removal from PV panel surface to the radiator surface with negligible temperature difference. Based on selected PV parameters and conditions, the proposed LHP-radiator cooling system achieves a peak temperature reduction of over 10 °C, leading to a 4.6 % enhancement in PV electrical efficiency compared to the reference efficiency. The selected systems’ results show an annual energy saving of 3.4 % (around 8.7 kWh/m2) for the year of 2022.
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