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.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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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. 

Twout
Outdoor
Brick
Concrete Wall
Heat Transfer, Q (W) =
Total Heat Resistance, RT (K/W) =
T₂
Inner Surface Temp, T₂ (°C) =
Toin
Indoor
(5 decimal places - example input: 2.01234x10^-3)
Transcribed Image Text:Twout Outdoor Brick Concrete Wall Heat Transfer, Q (W) = Total Heat Resistance, RT (K/W) = T₂ Inner Surface Temp, T₂ (°C) = Toin Indoor (5 decimal places - example input: 2.01234x10^-3)
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