HackerTube

Air Conditioning isn't free... but we're close.

Tech Ingredients1 HN recommenders · 2023–2025
1.4M views · tutorial · evergreen · Uploaded 2023-02-08

Tech Ingredients shows how to build a liquid panel with a specialty paint that, placed outside, cools below ambient air temperature. It demonstrates radiative sky cooling.

HN points to it in threads on radiative cooling as a hands-on explanation of passive daytime cooling.

Power grid, heating & buildingsEveryday physics & science demos

Watch on YouTube

4 comments from Hacker News

@jcims2023 · in “Just How White Can White Paint Get?”

>Only active cooling can cool anything below the ambient temperature. Not exactly: [LINK] Couple of videos explaining the effect [LINK] [VIDEO]

CitesView on HN
@simonjgreen2023 · in “Making Radiative Sky Cooling Paint (With Novel CaCO₃ Microsphere Synthesis) [video]”

There is a detailed example of this uploaded a few months ago here [VIDEO] [In fact, I just noticed the author of the OP video posted on this one]

CitesView on HN
@p1mrx2023 · in “Passive radiative cooling ceramic with high solar reflectivity”

That problem can be solved by adding a mirrored ring around the cooling surface, so it can only "see" the sky: [VIDEO]

CitesView on HN
@energ82025 · in “NASA's Voyager Found a 30k-50k Kelvin "Wall" at the Edge of Solar System”

It's a thing in from thousands of years ago [LINK] and today [LINK] for PDRC there are a couple good videos about it from NightHawkInLight [LINK] , [LINK] and Tech Ingredients [VIDEO] [LINK]

RecommendsView on HN