## Thermodynamics: An Engineering Approach 8th Edition

Published by McGraw-Hill Education

# Chapter 6 - The Second Law of Thermodynamics - Problems - Page 318: 6-93

#### Answer

The claim is valid

#### Work Step by Step

$COP_{HP}=\dot{Q}_H/\dot{W}_i$ Given $\dot{Q}_H=200\ kW,\ \dot{W}_i=75\ kW$ $COP_{HP}=2.67$ $COP_{HP, max}=\dfrac{1}{1-\frac{T_L}{T_H}}$ With $T_L=273\ K,\ T_H=293\ K$ $COP_{HP, max}=14.7$ Since $COP_{HP} < COP_{HP,max}$, the claim is valid

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