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Thread: Critical temperature
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09-01-2009, 08:20 AM #1
Critical temperature
hı guys,
I need to know what the critical temperature is for refrigerants.For example the critical temperature is 101 deg. for R-134A.If the gas temperature exceeds over 101 deg. (like 150 deg.) in the system,what will happen? does it lose physical and thermal properties?
ı am waiting for your help..
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09-01-2009, 08:29 AM #2
Re: Critical temperature
above this temp the gas can no longer condense into a liquid, only vapour is present above this temp. Refrigeration processes can exist sub critical (normal system) or transcritical, this means compressing a gas above its critical temp, rejecting heat through means of a gas cooler and then lowering the pressure so as to bring it below its critical temp and condense into a liquid. Transcritical is used especially on R744 (Co2) systems...and she said "give it to me you big fridgie"
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