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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?

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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

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