Q1 A The Hot Combustion Gases Of A Furnace Are Separated From The Ambient Air And Its Surroundings Which Are At 25 C 1 (73.06 KiB) Viewed 46 times
Q1 a) The hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25°C, by a brick wall 0.15 m thick (Figure la). The brick has a thermal conductivity of 1.2 W/m-K and a surface emissivity of 0.8. Under steady-state conditions an outer surface temperature of 100°C is measured. Free convection heat transfer to the air adjoining the surface is characterized by a convection coefficient of h = 20 W/m².K. What is the brick inner surface temperature?
Ti #-T2 = 100° C E = 0.8 I sur = 25°C arad Combustion 9 Cond gases a conv k = 1.2 W/m.K 111 T = 25° C h = 20 W/m2K AL= 0.15m Air Figure la
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