A detailed explanation and demonstration of a paint that cools down to sub-ambient (3C) temperatures with no energy input.
Nighthawkinlight version
Cooling Paint: How to Make Surfaces Stay Cool in the Sun
Submitted 7 months ago by CharlesMangione@lemmy.world to technology@lemmy.world
https://www.youtube.com/watch?v=dNs_kNilSjk
Comments
OhmsLawn@lemmy.world 7 months ago
Voyajer@lemmy.world 7 months ago
Tech ingredients is a great channel
eya@lemmy.dbzer0.com 7 months ago
Piped link
ForestOrca@kbin.social 7 months ago
TY!
CharlesMangione@lemmy.world 7 months ago
What’s this? Did you rehost it so we dont give google the traffic?
eya@lemmy.dbzer0.com 7 months ago
Piped is a FOSS frontend for YouTube that removes all the tracking/ads/geo restrictions and integrates SponsorBlock. It also doesn’t use any official APIs.
cheese_greater@lemmy.world 7 months ago
Its like watching paint cool, I’ve ALWAYS said that, I did.
Zron@lemmy.world 7 months ago
Has anyone here ever owned a white building?
They’re very hard to keep clean, especially in urban environments, which soak up most of the power used for cooling and where this product would be most beneficial.
How easy is this stuff to clean? Is it easily damaged by pressure washing? What kind of cleaners are needed for this to function reliably? Are those cleaners safe for the environment?
CharlesMangione@lemmy.world 7 months ago
You are absolutely right to be skeptical. There are a great many downsides to this technology. Getting it grimy, pointing it out of the sun, cloud cover, etc. will nullify any cooling effect. And yes, the DIY preparation shown would be completely destroyed by a powerwasher, or even a moderate storm. I have read recently of a university of maryland research team that made an improved coating that allowed the nanospheres to withstand significantly increased weathering while still remaining effective.
jawsua@lemmy.one 7 months ago
If I understand it right, it’s not a laser shooting heat into space. It doesn’t require a clear sky to function. It’s just moving the heat effectively away from itself by bypassing the atmospheric insulation, wherever that might be. And that goes for pointing it as well, except you wouldn’t really want it under direct sun for best heat transfer
evranch@lemmy.ca 7 months ago
My white building is currently covered by spiders and crud. Luckily it’ll soon be cleaned spotless by the first blizzard of the season, which would also polish off this paint.
However this is really just some science YouTubers replicating an experiment, far from a commercial product. It’s just for interest. I like Tech Ingredients, they try to do fairly rigorous work on the border of pure and applied science.
akrot@lemmy.world 7 months ago
It’s like thst new type of batteries that is revolutionary, but never turns into a product
ExFed@lemm.ee 7 months ago
You’re right: it’s probably not practical to paint a building with the stuff. Nighthawkinlight briefly comments on this. I believe the idea is to use it on passive radiator panels to sink heat from a pumped coolant fluid. That way you can strategically place panels (e.g. on the roof) and control them, just like solar heating panels.