Quote:
Originally Posted by MazdaMatt
This discussion inevitably turns to efficiency. I know that a 68cu air cylinder filled to 5000psi in half a minute gets HOT. That isn't coming from the compressor, but from the source tanks that were at room temp. I'm pretty sure that is an indication that the process is rather lossy, but i'm no compressor engineer.
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I can understand the cylinder getting hot if it is filled from the compressor, but I can't quite figure out how it would get hot just from equalizing with the pressure in the big tank. If you have 3K psi in the big tank decompressing into another tank, that should cause a cooling effect. Where does the heat come from?