Quote:
Originally Posted by mejunkhound
graphic COP vs. vent air temp and outside air temp (or ground temp minu 5-10F)
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Which, if I'm not mistaken, is another way of expressing the Carnot Efficiency Theorem, and as the difference between the source air temperature and the environmental air temperature becomes greater (the temperature lift becomes greater) the efficiency, COP in your case, gets smaller.
Good chart, thanks.
-AC