Show the thermal circuit for wall and label all temperatures

Reference no: EM131019098

The wall of a drying oven is constructed by sandwiching an insulation material of thermal conductivity k = 0.05 W/m. K between thin metal sheets. The oven air is at T_∞,i = 300° C, and the corresponding convection coefficient is hi =30 .The inner wall surface absorbs a radiant flux of = 100 W/m2 from hotter objects within the oven. The room air is at T∞o = 25°C, and the overall coefficient for convection and radiation from the outer surface is ho = 10 W/m2.

(a) Show the thermal circuit for the wall and label all temperatures, heat rates, and thermal resistances.

(b) What insulation thickness L is required to maintain the outer wall surface at a safe-to-touch temperature of To = 40°C?

Reference no: EM131019098

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