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Thread: Refrigerant for Low Temp
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06-06-2008, 11:12 AM #1
Refrigerant for Low Temp
Hi everyone,
I might have overlooked a similar thread to what I've started, but anyway what refrigerant should I use for a -60C room temp application? Apparently its for cold storage, I just don't have the other details right now.
Hope you could help me out on this one. Thanks!!
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06-06-2008, 02:34 PM #2
Re: Refrigerant for Low Temp
You might try a cascade system to R23. Ammonia or ***** on high stage. R23 has high pressures at ambient temperatures so a fade out vessel may be required to prevent system overpressure.
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08-06-2008, 01:54 AM #3
Re: Refrigerant for Low Temp
If you do a cascade system you might want to consider R-508b an azeotrope mixture of R-23 and R-116 because it is superior to just R-23. The compressor discharge temperature is lower then R-23 and that usually equates to longer compresor life and lubricant stability. The boiling point at 15psia is -125.5*F and the latent heat of vaporization at the boiling point is 73 btu/lb and it is nonflamable.
Last edited by wambat; 08-06-2008 at 02:00 AM.
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