QUESTION 1
The inside of a furnace is subjected to a uniform heat rate of 400 W from the inside
surface, while the outside surface is subjected to convection and radiation heat transfer.
The furnace wall is made of brick ($k = 1.21 \text{ W/m. K}$) has a thickness of 0.1 m insulated
with three layers, each 60 mm thick insulation of $k_1 = 0.02$; $k_2 = 0.06$ and $k_3 =$
0.1 W/mK. (Starting from inside). The outside air temperature is 20°C and $h =$
25 W/m$^2$. K and the emissivity $\epsilon = 0.5$.
Determined the inside surface temperature of the house wall as well as the Interface
temperatures of insulating layers.
