Consider the base plate of a 1200-W household iron that has a thickness of L = 0.5 cm, base area of A = 300 cm², and thermal conductivity of k=15 W/m . °C. The inner surface of the base plate is subjected to uniform heat flux generated by the resistance heaters inside, and the outer surface loses heat to the surroundings at T = 20°C by convection. Taking the convection heat transfer coefficient to be h = 80 W/m² °C and disregarding heat loss by radiation, obtain an expression for the variation of temperature in the base plate, and evaluate the temperatures at the inner and the outer surfaces. . Resistance heater 1200 W Insulation L h Base plate 300 cm² T = 20°C x
Consider the base plate of a 1200-W household iron that has a thickness of L = 0.5 cm, base area of A = 300 cm², and thermal conductivity of k=15 W/m . °C. The inner surface of the base plate is subjected to uniform heat flux generated by the resistance heaters inside, and the outer surface loses heat to the surroundings at T = 20°C by convection. Taking the convection heat transfer coefficient to be h = 80 W/m² °C and disregarding heat loss by radiation, obtain an expression for the variation of temperature in the base plate, and evaluate the temperatures at the inner and the outer surfaces. . Resistance heater 1200 W Insulation L h Base plate 300 cm² T = 20°C x
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 2.38P:
2.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from...
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