4. A 2 mm diameter and 10 m long electric wire (copper with k=300W/(m-K) is tightly wrapped with a 1 mm thick plastic cover whose thermal conductivity is 0.15 W/(m-K). A current of 10 A passes through the wire, and there is a voltage drop of 8V along the wire a) If the insulated wire is exposed to a medium at T = 30°C with a heat transfer coefficient h= 24W/(m²-K), calculate the heat flux through the outside of the insulation layer at steady state. b) Determine the steady state temperatures at the interface
4. A 2 mm diameter and 10 m long electric wire (copper with k=300W/(m-K) is tightly wrapped with a 1 mm thick plastic cover whose thermal conductivity is 0.15 W/(m-K). A current of 10 A passes through the wire, and there is a voltage drop of 8V along the wire a) If the insulated wire is exposed to a medium at T = 30°C with a heat transfer coefficient h= 24W/(m²-K), calculate the heat flux through the outside of the insulation layer at steady state. b) Determine the steady state temperatures at the interface
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.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.29P
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