The efficiency of a system is determined by determining
the difference between the amount of work and energy that is put
into a system versus the amount of work and energy that you get
out of a system. The efficiency of a refrigerator or a
heat pump is determined from the heat out, QH,
the heat in, QL.
Efficiency of Refrigerator = 1/((QH/QL)-1)
Efficiency of Heat Pump= 1/(1-(QL/QH))
With the maximum efficiency, called the
Carnot Efficiency, given by Carnot Efficiency for
Refrigerator = 1/((TH/TL)-1)
Carnot Efficiency for Heat Pump= 1/(1-(TL/TH))
