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Thread: Theoretical COP
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18-05-2008, 10:05 PM #1
Theoretical COP
The link below provides a table relating to Daikins future refrigerant technologies.
http://www.daikin.com/environment/in...luence_03.html
Click - Types and properties of future refrigerants.(table) half way down the page.
Ammonia (NH3) is stated as having a therotical COP (Relative to R22) of 107.
What does this figure of 107 represent ?
And in terms of energy output/input what is the ratio ?
For example many domestic heat pump manufacturers state cop's as high as 5-1. (NIBE Fighter)
Many thanks.Last edited by Solair; 18-05-2008 at 10:08 PM.
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20-05-2008, 03:06 AM #2
Re: Theoretical COP
It is probably a percentage. I did a quick calculation of the theoretical COP of both 22 and NH3 @ 0C evaporating, 45C condensing, 100% isentropic efficient compressors and I got:
NH3 COP = 5.05
R22 COP = 4.77
so in this case, the NH3 COP was 106% that of R22
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20-05-2008, 10:00 PM #3
Re: Theoretical COP
Many Thanks. Very Helpful.
Have just discovered the Heap Pump sub Forum also and finding it very informative.
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