Unconditioned Texas Garage Lab – 1 year later

Re:Unconditioned Texas Garage Lab – 1 year later by abetusk on Tuesday October 20, 2020 @09:28PM (#24844029)

I'm no expert at this whatsoever but from what I've gleaned looking around, a good heuristic is that removing hot air is way better than pushing cold air in.

As a kind of hand-waivy argument, I think of the difference between averaging cool air with how hot it gets ("pushing" air in) vs. removing and replacing with ambient temperature air. In the case of 'pushing' air in, the average of something like 40deg F with 300deg F is 170deg F. Even if ambient is 70deg F, by replacing air with ambient, that's a 2x better cooling, not to mention the energy saving from just using a fan compared with cooling with an air conditioner or some other equipment.

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Re:Unconditioned Texas Garage Lab – 1 year later by latchkey on Wednesday October 21, 2020 @03:38PM (#24851255)

I manage a large datacenter of air cooled fanless (radiator) GPUs housed in cases where the case fans are on the hot side and pulling the air out. Hot air expands, which fills the space (more pressure) and thus prevents cooler air from getting in (you have to push harder to get it in). The faster you can get rid of hot air from the enclosure, the better.

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