A 90-amp electric current is flowing through a 6-mm diameter lead wire. The thermal conductivity of the lead is k = 32 W/m K and the electrical resistance per unit length of the wire is R = 0.0073 N/m. The outer surface of the lead wire is exposed to 40°C air with a convection heat transfer coefficient of h= 12 W/m². K. Find the temperature at the center of the lead wire.
A 90-amp electric current is flowing through a 6-mm diameter lead wire. The thermal conductivity of the lead is k = 32 W/m K and the electrical resistance per unit length of the wire is R = 0.0073 N/m. The outer surface of the lead wire is exposed to 40°C air with a convection heat transfer coefficient of h= 12 W/m². K. Find the temperature at the center of the lead wire.
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.
Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.30P: 2.30 An electrical heater capable of generating 10,000 W is to be designed. The heating element is...
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