3 ms·
Anyone know how this is supposed to work. The part about "compressing and cooling the air" doesn't make any sense. The air wouldn't be compressed and it it was
by upofadown 10y ago
Anyone know how this is supposed to work. The part about "compressing and cooling the air" doesn't make any sense. The air wouldn't be compressed and it it was it would get warmer, until it wasn't compressed any more.
My guess is that it allows a relatively high level of ventilation but blocks the sun that would otherwise come in through the open window. So more or less the same effect as an awning.
- HeyLaughingBoy 10y agoIt's the expansion of the compressed air that cools it. IANAME (I'm not a mechanical engineer) but thinking through the physics of it, you need a fairly strong airflow since the compression has to be adiabatic (air must be compressed quickly enough so it doesn't heat up), then once it expands, it cools. Of course all of this still takes energy and I'm not motivated to do the math, but cooling a room by 5 deg C still takes the same amount of energy whether it's powered by wind or electricity.
- upofadown 10y ago>air must be compressed quickly enough so it doesn't heat up The heating is inherent to the compression. Adiabatic means something else. To make air based refrigeration work, you would have to compress the air and transfer the extra heat somewhere else. Then you would get cooling when you let the air expand again. ... which is all still moot as the air would not be compressed enough to matter in this case.