Consider a heat treatment furnace situated in a 30oC room with an average convection heat transfer coefficient of 12W/m2K. The door of the furnace is made of 20 mm-thick steel plate with thermal conductivity, k=25W/mK. A constant heat flux of 8kW/m2 is applied to the inner surface of the door, and the outer surface has an emissivity of 0.23. What is the outer surface temperature of the furnace door? Is this safe? What can you do to make it safe?

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
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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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Consider a heat treatment furnace situated in a 30oC room with an average convection heat transfer coefficient of 12W/m2K. The door of the furnace is made of 20 mm-thick steel plate with thermal conductivity, k=25W/mK. A constant heat flux of 8kW/m2 is applied to the inner surface of the door, and the outer surface has an emissivity of 0.23. What is the outer surface temperature of the furnace door? Is this safe? What can you do to make it safe?

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