There's PDRC, but we can't mass produce the "photonic metamaterials" that make i... | Hacker News

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		card_zero 1 day ago \| parent \| context \| favorite \| on: What happens to an economy when it's too hot to wo... There's PDRC, but we can't mass produce the "photonic metamaterials" that make it good. https://en.wikipedia.org/wiki/Passive_daytime_radiative_cool... It ought to be great. Takes no energy, sends heat through the infrared window back out into space where it came from.
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OutOfHere 1 day ago [–]

I researched the topic and produced a short video on it: https://youtu.be/NVAcSgLZues

Purdue University produced a barium sulfate nanocomposite paint that has 98% reflectance in the desired band using a 150μm layer, cooling surfaces by 4.5C.

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