Q1 a) The hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25°C,
Posted: Sun May 15, 2022 9:47 pm
- Q1 A The Hot Combustion Gases Of A Furnace Are Separated From The Ambient Air And Its Surroundings Which Are At 25 C 1 (74.06 KiB) Viewed 82 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 T.... = 25°C sur grad Combustion gases 9 cond • a'conv = k = 1.2 W/mK 111 To = 25° C h = 20 W/m2K L= 0.15m Air x Figure la