Thermodynamics: An Engineering Approach 8th Edition

Published by McGraw-Hill Education
ISBN 10: 0-07339-817-9
ISBN 13: 978-0-07339-817-4

Chapter 2 - Energy, Energy Transfer, and General Energy Analysis - Problems - Page 101: 2-63

Answer

$Q_{dissipated}=345.23W$

Work Step by Step

The rate of heat supply by the fan motor to the room is the one that dissipates as heat and the one that move the fan wich eventually is dissipated as heat. Then all the electrical energy consumed is dissipated as heat: $Q_{dissipated}=\frac{0.25hp*\frac{745.7W}{1hp}}{0.54}=345.23W$
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