Consider a plane composite wall that is composed of two materials of thermal conductivities kA 0.1 W/mK and kB 0.04 W/mK and thi
cknesses LA 10 mm and LB 20 mm. The contact resistance at the interface between the two materials is known to be 0.30 m2 K/W. Material A adjoins a fluid at 200°C for which h = 10 W/m2 K, and material B adjoins a fluid at 40°C for which h = 20 W/m2 K. a)What is the rate of heat transfer through a wall that is 2.5 meters high by 2 meters side?
b)What is the temperature at the exposed surface of material A?
c)What is the temperature at the exposed surface of material B?