Radiative Sky Cooling

Image: Aaswath P. Raman, Wei Li, Shanhui Fan

Researchers at UCLA have produced a prototype energy unit that takes advantage of radiative sky cooling to generate electricity at night. As heat is radiated from objects facing the sky at night, a thermoelectric generator can be used to generate electricity from the temperature difference, in this case 25 milliwatts per square metre using equipment costing $30.

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