Answer to Question #344467 in Mechanical Engineering for Eyaaaah

Question

The wall of the rice hull furnace is made up of 9 in. of fire

brick (k=0.72 Btu/hr-ft℉), 5in.of insulating brick (k=0.08

Btu/hr-ft-F)and 7.5 in. of red brick (k=0.5 Btu/hr-ft-F) . The

inner and outer surface temperatures 𝑡1 and 𝑡4 are 1500℉

and 150℉, respectively. Neglecting the resistances of the

mortar joints, compute the temperatures 𝑡2 and 𝑡3 at the

contact surface.