<P> The coefficient of performance or COP ( sometimes CP or CoP ) of a heat pump , refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required . Higher COPs equate to lower operating costs . The COP usually exceeds 1 , especially in heat pumps , because , instead of just converting work to heat ( which , if 100 % efficient , would be a COP_hp of 1 ) , it pumps additional heat from a heat source to where the heat is required . For complete systems , COP calculations should include energy consumption of all power consuming auxiliaries . COP is highly dependent on operating conditions , especially absolute temperature and relative temperature between sink and system , and is often graphed or averaged against expected conditions . </P>
<P> The coefficient of performance or COP ( sometimes CP or CoP ) of a heat pump , refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required . Higher COPs equate to lower operating costs . The COP usually exceeds 1 , especially in heat pumps , because , instead of just converting work to heat ( which , if 100 % efficient , would be a COP_hp of 1 ) , it pumps additional heat from a heat source to where the heat is required . For complete systems , COP calculations should include energy consumption of all power consuming auxiliaries . COP is highly dependent on operating conditions , especially absolute temperature and relative temperature between sink and system , and is often graphed or averaged against expected conditions . </P>
the coefficient of performance ( cop ) of a refrigerator is defined as the ratio of
the coefficient of performance ( cop ) of a refrigerator is defined as the ratio of
useful heating or cooling provided to work required
useful heating or cooling provided to work required