3 ms·
This reminded me of zero electricity air-con made of plastic bottles: https://www.straitstimes.com/world/zero-electricity-air-con-made-of-plastic-bottles https:
by iforgotmypass 7y ago
This reminded me of zero electricity air-con made of plastic bottles:
https://www.straitstimes.com/world/zero-electricity-air-con-made-of-plastic-bottles https://www.straitstimes.com/world/zero-electricity-air-con-...
The hot air flowing from outside through your windows could be compressed making it cool.
I wonder if there are existing, not so ugly commercial products providing that. This could be a green alternative for air-conditioning.
- Filligree 7y ago> The hot air flowing from outside through your windows could be compressed making it cool. Compressing air actually makes it hotter, but that's not what's happening. Forcing air through a smaller space makes it flow faster, which ironically makes it less dense -- and hence colder. It's the same effect that people claim holds airplanes up. (But doesn't. That's mostly the angle of attack.)
- DoctorOetker 7y agoI don't understand this heat engine yet, one it exits the bottles it contracts again, heating up? it cools the window but heats up the air?
- icebraining 7y agoAlternatively, you could power an A/C with a micro wind turbine. Both have the same problem: no wind, no cooling. I'm currently in 30ºC and the tree leaves barely move.
- abdullahkhalids 7y agoThis doesn't actually work. https://physics.stackexchange.com/questions/261284/how-does-the-eco-cooler-air-conditioner-really-work https://physics.stackexchange.com/questions/261284/how-does-...