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The hot combustible gasses of a furnace are separated from the ambient air and its surrounding,...

The hot combustible gasses of a furnace are separated from the ambient air and its surrounding, which are 28oC, by a brick wall 120 mm thick. The brick has a thermal conductivity of 1.23 W/m-oK and a surface emissivity of 0.82. At steady state conditions the outer surface temperature is 120oC. Air surface film conductance is 15 W/m2-oK. What is the total heat transmitted for 20 square meter area.The hot combustible gasses of a furnace are separated from the ambient air and its surrounding, which are 28oC, by a brick wall 120 mm thick. The brick has a thermal conductivity of 1.23 W/m-oK and a surface emissivity of 0.82. At steady state conditions the outer surface temperature is 120oC. Air surface film conductance is 15 W/m2-oK. What is the total heat transmitted for 20 square meter area.

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