SCFM vs. CFM, also air flow/pressure across a regulator
In article , Tim Williams says...
So where does the heat go?
In the case where large amounts of gas are
expanding, the expansion valve will cool,
and the heat from the surrounding area will
flow into the region. Also the gas will
exit the expansion valve at a lower
temperature than it came in at.
This is how gas liquifers are designed,
either with direct expansion valves or
with expansion turbines, where the gas
actually performs mechanical work as it
expands, and thus cools.
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