Consider a 5-m-high, 8-m-long, and 0.22-m-thick wall whose representative cross section is as given in the figure. The thermal conductivities of various materials used, in W/m·K, are k_A= k_F= 2, k_B= 8, k_C= 20, k_D= 15, and k_E= 35. The left and right surfaces of the wall are maintained at uniform temperatures of 300°C and 100°C, respectively. Assuming heattransfer through the wall to be onedimensional, determine

(a) The rate of heat transfer through the wall;

(b) The temperature at the point where the sections B, D, and E meet;

(c) The temperature drop across the section F. Disregard any contact resistances at the interfaces.

Transcribed Image Text:

100°C 300°C A 4 čm 6 cm 4 cm fC 4 çm 6 cm cm 10 cm 6 cm 1 cm 5 ст