5 ms·
I'd like to know more about this. Check valves [1] do just this, and they work without energy input, what is the difference ? https://en.wikipedia.org/wiki/Che
by bnegreve 9y ago
I'd like to know more about this. Check valves [1] do just this, and they work without energy input, what is the difference ?
https://en.wikipedia.org/wiki/Check_valve https://en.wikipedia.org/wiki/Check_valve
- Baeocystin 9y agoSomething that can discriminate without energy input is a form of Maxwell's Demon. If you are unfamiliar, it's a lot of fun to learn about. https://en.wikipedia.org/wiki/Maxwell%27s_demon https://en.wikipedia.org/wiki/Maxwell%27s_demon is a reasonable start. Check valves absolutely do consume energy. Something has to resist the spring forcing them closed, or they would never open. They are convenient in that their energy is sourced from the very thing they are controlling, but they are energy-consuming devices.
- MacsHeadroom 9y agoHigher air pressure could provide the necessary energy. There are easier ways to get moisture out of a tunnel though.
- Baeocystin 9y agoSure, there's lots of ways to do so. My only point is that none of them are 'free'.