Answer
B
Work Step by Step
From the definitions:
$COP_{HP,rev}=\dfrac{T_H}{T_H-T_L}$
With $T_H=294\ K,\ T_L=T_0=282\ K$
$COP_{HP,rev}=24.5$
$COP_{actual}=COP_{res.\ heater}=1$
$\eta_{_{II}}=\dfrac{COP_{actual}}{COP_{rev}}=4.08\%$
Thermodynamics: An Engineering Approach 8th Edition
by Cengel, Yunus; Boles, Michael
Published by
McGraw-Hill Education
ISBN 10:
0-07339-817-9
ISBN 13:
978-0-07339-817-4
Chapter 8 - Exergy - Problems - Page 483: 8-140
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