A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?

A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.36P

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