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Registered Member #61406
Joined: Thu Jan 05 2017, 11:31PM
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Posts: 268
I'm trying to work out what the pressure and temperature in the picture are ,but with the different gas laws I'm going around in circle, any help apreacated
Registered Member #61406
Joined: Thu Jan 05 2017, 11:31PM
Location:
Posts: 268
Its like making liquid air,pressure gets released into a larger volume cooling down and the cold air cools down the incoming air. I type of understand that, but what happens if the large volume that's cold goes into a smaller volume which is the same volume as the inlet part does the exit temperature go back to the same temperature and pressure as the inlet. Does it need thermal insulation or can it just be steel.
Registered Member #2939
Joined: Fri Jun 25 2010, 04:25AM
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Posts: 615
If its a continuously flowing system the volume is irrelevant. Only change in pressure really matters. What you will see at your outlet is an increase in velocity compared to your inlet ( same mass flow at lower pressure requires higher velocity). The only way your low pressure air is going to increase in pressure is if you have a pump of some sort, which is, of course, the only way push a large volume into a smaller volume. And yes, if you are trying to make liquid air using the Linde process your vessel needs to be well insulated - preferably a dewar.
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