GATE MT 2011 38. A furnace wall consists of two layers. The middle layer of 450mm is made of light weight brick of thermal conductivity 1 w/m K and the outside layer of 900mm is made of thermal conductivity 2 w/m K. The hot face of the inside layer is temperature 1300 K and the cold face of the outer layer is at 400k. The temperature at the interface between the two layers is:
GATE MT 2011 38. A furnace wall consists of two layers. The middle layer of 450mm is made of light weight brick of thermal conductivity 1 w/m K and the outside layer of 900mm is made of thermal conductivity 2 w/m K. The hot face of the inside layer is temperature 1300 K and the cold face of the outer layer is at 400k. The temperature at the interface between the two layers is:
Share
Correct answer is option B. Q. = kA dT/dx 1× (1300-T) / 4T = 2× (T- 400)/ 900 On simplification, T= 850 K
Correct answer is option B.
Q. = kA dT/dx
1× (1300-T) / 4T = 2× (T- 400)/ 900
On simplification, T= 850 K
See less