A Clear night sky radiative cooling -- How to optimize?

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    Collector Cooling
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The optimal color for a collector to enhance night sky radiative cooling is black, as it effectively absorbs infrared radiation. This color maximizes heat loss to the clear night sky, improving cooling efficiency. Additionally, the material's emissivity plays a crucial role in the cooling process, with higher emissivity materials being more effective. Factors such as surface texture and geometry can also influence performance. Overall, using a black, high-emissivity material is recommended for optimal radiative cooling.
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radiative cooling.
hi guys:
what should be the colour of the collector for best cooling effect of night clear sky radiative cooling?
 
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