On Wed, 31 Dec 2003 23:45:21 -0600, Richard J Kinch wrote:
Don Foreman writes
The loss
is at the compressor, not at the regulator. The compressor gets hot
but the regulator does not, right?

The regulator can get downright chilly. Temperature is not heat or a
measure of heat. Something can get colder and gain heat at the same
time.

It cannot if that something has a fixed mass of material with a fixed heat
capacity. I think it is safe to say that any given regulator has a fixed mass,
and the material of which it is made does not change during operation, so
the heat capacity does not change. Therefore, the heat in the regulator
*is* directly proportional to the regulator temperature.

Gary