A room is heated with a 1500 W electric heater. How much power can be saved if a heat pump with a COP of 2.0 is used instead?
Assume the heat pump has to deliver 1500 W as the Q.H.
Heat pump:
So the heat pump requires an input of 750 W thus saving the difference
Wsaved = 1500 W – 750 W = 750 W
