- Q1 A The Hot Combustion Gases Of A Furnace Are Separated From The Ambient Air And Its Surroundings Which Are At 25 C 1 (23.74 KiB) Viewed 51 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 1a). 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 = Tsur = 25°C = a rad Combustion gases a cond acony k = 1.2 W/m.K 111 T = 25°C h = 20 W/m2.K L= 0.15m Air x Figure 1a