Answer
$\dot{W}_e=4.716\ hp$
Work Step by Step
With $\eta = \dot{W}_e/\dot{Q}_H$
Given $\eta = 0.40,\ \dot{Q}_H=3\times10^4\ Btu/h$
$\dot{W}_e=1.2\times10^4\ Btu/h=4.716\ hp$
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 6 - The Second Law of Thermodynamics - Problems - Page 313: 6-17E
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