9 ms·
Also while extremely trivial here, higher pressure air has a higher capacity to transfer heat.
by jjcm 8y ago
Also while extremely trivial here, higher pressure air has a higher capacity to transfer heat.
- lmilcin 8y agoWhile this is technically true, the difference is very minor at the typical pressure ranges being used. The highest performing PC fans create about 10mmH2O pressure while typically you can expect about 1mmH2O pressure compared to 10mH2O of the atmosphere. This translates to densening of the atmosphere around components by 0.1% or 0.01%, respectively. Correct placement and design is by orders of magnitude more important than the increased efficiency due to higher density of air. You could see much more effect by making your air more humid (humid air has higher heat capacity), which will be also much more pronuncable than the increased density due to pressure.
- mberger 8y agoTIL about mmH2O. Is this common in HVAC? I thought pressure was mostly in mmHg or bars(millibars).
- Cerium 8y agoYes, fans usually have a specification on the pressure they can create in inches of water or millimeters of water. I think it is because you can measure it yourself with just a tube and water- open end manometer.
- lightedman 8y ago"The highest performing PC fans create about 10mmH2O pressure" I'm guessing you've never worked with a Delta fan. Those things produce enough pressure to literally suspend themselves in mid-air.