A heat engine is used to drive a heat pump. The heat transferred from the heat engine and from the heat pump is used to heat the water circulating through the radiator of a building. The efficiency of the heat engine is 37% and the cop of the heat pump is 6. Evaluate the ratio of the heat transfer to the circulating water to the heat transfer to the heat engine
Tamilmani , 7 Years ago
Grade 12th pass
1 Answers
Arun
Last Activity: 7 Years ago
Let Q1 be heat entering the engine and Q2 and Q3 be the heat transfer to water.
To find: (Q2+Q3)/Q1 = k
Given: η = 0.37; COP =6
Solution: W = ηQ1 = 0.37Q1
Q2 = (1-η) Q1 = 0.63 Q1
Q3 = COP x W = 6 x 0.37 x Q1 = 2.22 Q1
K = (0.63 Q1 + 2.22 Q1)/Q1 = 2.85
Regards
Arun
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