Energy transfers by heat through the exterior walls and
Chapter 22, Problem 63(choose chapter or problem)
Energy transfers by heat through the exterior walls and roof of a house at a rate of 5.00 3 103 J/s 5 5.00 kW when the interior temperature is 22.0C and the outside temperature is 25.00C. (a) Calculate the electric power required to maintain the interior temperature at 22.0C if the power is used in electric resistance heaters that convert all the energy transferred in by electrical transmission into internal energy. (b) What If? Calculate the electric power required to maintain the interior temperature at 22.0C if the power is used to drive an electric motor that operates the compressor of a heat pump that has a coefficient of performance equal to 60.0% of the Carnot-cycle value.
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