Radiative cooling can reject significantly more waste heat than convection and conduction at high temperatures by sending it directly into space. As a passive and compact cooling mechanism, radiative cooling is lightweight and does not consume energy. These qualities are promising for thermal management in outdoor systems generating low grade heat, such as concentrating photovoltaics (CPV) and thermophotovoltaics (TPV). In this work, we first simulate radiative cooling for a wide range of working conditions, including heat loads from 6 to 100 W with different CPV cooling designs. We then demonstrate a CPV system integrated with radiative coolers, achieving a 5°C to 36°C temperature drop and an 8% to 27% relative increase of open-circuit voltage for a GaSb solar cell, under a heat load of above 6 W with different cooling designs. We show that the temperature drops from radiative cooling may significantly improve CPV system lifetimes.

通过辐射冷却，直接将其直接排入太空，与高温下的对流和传导相比，它可以排除更多的废热。作为一种被动且紧凑的冷却机制，辐射冷却重量轻且不消耗能量。这些品质对于在产生低等级热量的室外系统（例如聚光光伏（CPV）和热光伏（TPV））中进行热管理很有希望。在这项工作中，我们首先在广泛的工作条件下模拟辐射冷却，包括采用不同的CPV冷却设计的6至100 W的热负荷。然后，我们演示了集成有辐射冷却器的CPV系统，在6 W以上的热负荷下，GaSb太阳能电池的温度下降了5°C至36°C，开路电压相对增加了8％至27％。具有不同的散热设计。