A house is maintained at 21C in winter by electric resistance heaters. If the outdoor temperature is

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A house is maintained at 21°C in winter by electric resistance heaters. If the outdoor temperature is 9°C, the second-law efficiency of the resistance heaters is
(a) 0%
(b) 4.1%
(c) 5.7%
(d) 25%
(e) 100%

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Thermodynamics An Engineering Approach

ISBN: 978-0073398174

8th edition

Authors: Yunus A. Cengel, Michael A. Boles

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Question Posted: Apr 01, 2016 05:08 AM

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A house is maintained at 21C in winter by electric resistance heaters. If the outdoor temperature is

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