A 0.21cm diameter electrical wire at 32oC is covered by 0.05cm thick plastic insulation (k = 0.13 W/mK). The wire is exposed to a medium at 10oC with a combined convection and radiation heat transfer coefficient of 14 w/m2K. a) Determine the heat transfer rate of the wire. b) Determine if the plastic insulation on the wire will increase or decrease heat transfer from the wire. c) Determine the heat transfer rate of the wire with an added thermal contact resistance of 0.000176 m2K/W at the interface of the wire and the insulation.
A 0.21cm diameter electrical wire at 32oC is covered by 0.05cm thick plastic insulation (k = 0.13 W/mK). The wire is exposed to a medium at 10oC with a combined convection and radiation heat transfer coefficient of 14 w/m2K. a) Determine the heat transfer rate of the wire. b) Determine if the plastic insulation on the wire will increase or decrease heat transfer from the wire. c) Determine the heat transfer rate of the wire with an added thermal contact resistance of 0.000176 m2K/W at the interface of the wire and the insulation.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A 0.21cm diameter electrical wire at 32oC is covered by 0.05cm thick plastic insulation (k = 0.13 W/mK). The wire is exposed to a medium at 10oC with a combined convection and radiation heat transfer coefficient of 14 w/m2K.
a) Determine the heat transfer rate of the wire.
b) Determine if the plastic insulation on the wire will increase or decrease heat transfer from the wire.
c) Determine the heat transfer rate of the wire with an added thermal contact resistance of 0.000176 m2K/W at the interface of the wire and the insulation.
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