In the metal processing industry, heat treatment of metals is commonly done using electrically heated draw batch furnaces. Consider a furnace that is situated in a room with surrounding air temperature of 30° C and an average convection heat transfer coefficient of 12 W/m²⋅K. The furnace front is made of a steel plate with thickness of 20 mm and a thermal conductivity of 25 W/m⋅K. The outer furnace front surface has an emissivity of 0.23, and the inside surface is subjected to a heat flux of 8 kW/m². Determine the outside surface temperature of the furnace front.

Transcribed Image Text:

90 = 8 kW/m² FIGURE P16-59 Furnace front € = 0.23 Tsurr = 30°C Air, 30C h = 12 W/m²K To