In article , Richard J Kinch
says...

Scuba tanks filled from a bulk cylinder bank (cylinders previously cooled
to room temp) do not heat up like scuba tanks filled on-the-fly from a
running compressor drawing free air.

Again, if your 'theory' that you ascribe to fails to predict what
actually happens in real life, it is simply plain flat out
wrong. I and about a dozen other ng members have personally
performed both examples (filling from a compressor, and filling
a tank from another tank) and can assure you that the reservoir
being filled does not care one single iota what is at the
other end of the fill fitting.

It warms up in both cases. If you want do the same experiment
yourself, or read up on the details of the gas law.

Jim

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