> We've considered it, but it looks like the required
> of LN2 would be awkwardly large... especially now
> that I'm getting
> down to the desired temperatures with mechanical
> (A domestic freezer won't reach -40 to -60 F, but
> this temperature
> range is within the capabilities of commercial
This should probably be looked at as an exercise in
thermodynamics, but still might be interesting.
It's known that air cools, when released from a highly
pressurized volume. Say, today you can reasonably easy
get air compressed to 200-300 bars.
The question is, how much the air can cool when
expanding from 300 bars to 1 bar, starting from normal