A heat pump with a COP of 3.2 is used to heat a perfectly
Chapter 6, Problem 164P(choose chapter or problem)
Problem 164P
A heat pump with a COP of 3.2 is used to heat a perfectly sealed house (no air leaks). The entire mass within the house (air, furniture, etc.) is equivalent to 1200 kg of air. When running, the heat pump consumes electric power at a rate of 5 kW. The temperature of the house was 7°C when the heat pump was turned on. If heat transfer through the envelope of the house (walls, roof, etc.) is negligible, the length of time the heat pump must run to raise the temperature of the entire contents of the house to 22°C is
(a) 13.5 min
(b) 43.1 min
(c) 138min
(d) 18.8 min
(e) 808 min
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