4 ms·

There's PDRC, but we can't mass produce the "photonic metamaterials" that make it good. https://en.wikipedia.org/wiki/Passive_daytime_radiative_cooling https:/

There's PDRC, but we can't mass produce the "photonic metamaterials" that make it good. https://en.wikipedia.org/wiki/Passive_daytime_radiative_cooling 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.

OutOfHere 4mo ago
I researched the topic and produced a short video on it: https://youtu.be/NVAcSgLZues 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.