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A heat pump is absorbing heat from the cold outdoors at
Chapter 6, Problem 159P(choose chapter or problem)
Problem 159P
A heat pump is absorbing heat from the cold outdoors at 5°C and supplying heat to a house at 25°C at a rate of 18,000 kJ/h. If the power consumed by the heat pump is 1.9 kW, the coefficient of performance of the heat pump is
(a) 1.3
(b) 2.6
(c) 3
(d) 3.8
(e) 13.9
Questions & Answers
QUESTION:
Problem 159P
A heat pump is absorbing heat from the cold outdoors at 5°C and supplying heat to a house at 25°C at a rate of 18,000 kJ/h. If the power consumed by the heat pump is 1.9 kW, the coefficient of performance of the heat pump is
(a) 1.3
(b) 2.6
(c) 3
(d) 3.8
(e) 13.9
ANSWER:
Step 1 of 2
We need to find the coefficient of performance of the heat pump.
Given:
The amount of heat supplied =18,000 KJ/h.
The lower temperature of heat pump: 5°C
The higher temperature of heat pump: 25°C
power consumed by the heat pump is 1.9 kW