Physics Asked by Björn Morén on February 9, 2021
Will cooling off the condenser coil improve the efficiency of a domestic refrigerator, based on R134a? If so, what is the lowest ambient temperature the condenser can take, for the system to still work?
My idea is to rewire a standard refrigerator, and put the condenser coil outdoors, while keeping the evaporator and the box indoors. Outdoor temperature where I live varies between +25C and -20C.
Having a cooler condenser coil would improve efficiency. I do not think too low of an ambient temperature will be a problem, I could not find the freezing point of r134a, but its boiling point at 1 atmosphere is -26.3 degrees C so I don't think you will have a problem.
Answered by Adrian Howard on February 9, 2021
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