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Thread: forane 141b
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18-05-2006, 01:06 AM #1
forane 141b
Hey guys, I am a university student attempting to finish a refrigeration lab. Unfortunately, the refrigerant used is 141b. From what I understand, 141b is no longer being used, so why we're using it I don't know. I have a crummy photocopied p-h (mollier) diagram, but it doesn't include temperatures in the subcooled region (below saturated liquid line). I can't find this info anywhere using google, probably because it's ancient. Thanks for the help!
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18-05-2006, 01:55 AM #2
Re: forane 141b
HI pajohn,
...but it doesn't include temperatures in the subcooled region...
If the liquid is subcooled, the temperature decreases at a constant pressure (one definition). As the temperature is decreased the enthalpy also decreases.
Most P-H diagrams don't show these as they make the diagram harder to read.
...but it doesn't include temperatures in the subcooled region (below saturated liquid line).
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18-05-2006, 01:46 PM #3
Re: forane 141b
Thanks mate. I was looking in a textbook with 134a and they were vertical isotherms up to a certain point, but that's above the critical pressure, so I don't need to worry about that.