Repeat Prob. 3101E, assuming a thermal contact resistance of 0.001 hft 2 F/Btu at the interface of
Question:
Repeat Prob. 3–101E, assuming a thermal contact resistance of 0.001 h·ft2·°F/Btu at the interface of the wire and the insulation.
Data from problem 101
A 0.083-in-diameter electrical wire at 90°F is covered by 0.02-in-thick plastic insulation (k = 0.075 Btu/h·ft·°F). The wire is exposed to a medium at 50°F, with a combined convection and radiation heat transfer coefficient of 2.5 Btu/h·ft2·°F. Determine if the plastic insulation on the wire will increase or decrease heat transfer from the wire.
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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