A wall with a brick and concrete layer is shown in the figure. The wall has a length of 15 m and 6 m high. The brick (k = 1.3 W/m-K) has a thickness of 75 mm and the concrete (k = 2 W/m-K) is 150 mm thick. Determine the total heat resistance, the heat transfer rate through the wall, and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 32°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the wall to be 12 W/m2-K and 18 W/m2-K, respectively, which includes the effects of radiation. Round off your final answer to three (3) decimal places.

A wall with a brick and concrete layer is shown in the figure. The wall has a length of 15 m and 6 m high. The brick (k = 1.3 W/m-K) has a thickness of 75 mm and the concrete (k = 2 W/m-K) is 150 mm thick. Determine the total heat resistance, the heat transfer rate through the wall, and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 32°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the wall to be 12 W/m2-K and 18 W/m2-K, respectively, which includes the effects of radiation. Round off your final answer to three (3) decimal places.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.36P

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