A house has a composite wall of WOod, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold day, the temperature and the convection heat trans- fer coefficients are Tei=20°C, h;=30 W/m²K and To=-15°C, h, =60 W/m²K. The wall surface area is 350 m². Determine the total heat loss through the wall. Conductivities are given as k,=0.038 W/m.K, k̟=0.012 W/m.K, k,=0.17 W/m.K.
A house has a composite wall of WOod, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold day, the temperature and the convection heat trans- fer coefficients are Tei=20°C, h;=30 W/m²K and To=-15°C, h, =60 W/m²K. The wall surface area is 350 m². Determine the total heat loss through the wall. Conductivities are given as k,=0.038 W/m.K, k̟=0.012 W/m.K, k,=0.17 W/m.K.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
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Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.40P: One end of a 0.3-m-long steel rod is connected to a wall at 204C. The other end is connected to a...
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Heat transfer
![A house has a composite wall of wood, fiberglass insulation, and plaster board, as
indicated in the sketch. On a cold day, the temperature and the convection heat trans-
fer coefficients are Tei=20°C, h;=30 W/m²K and Teo=-15°C, h,=60 W/m²K. The
wall surface area is 350 m?. Determine the total heat loss through the wall.
Conductivities are given as k,=0.038 W/m.K, k, =0.012 W/m.K, k,=0.17 W/m.K.
Glass fiber blanket
(28kg/m³), k,
Plaster board, k,
Plywood siding, k,
11
11
10mm E100mm E20mm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff421567c-0b6d-4a65-bd4d-7b4ada66978b%2F0cc2181e-1911-468a-90a1-dfe6f5b75434%2F5rzbspd_processed.png&w=3840&q=75)
Transcribed Image Text:A house has a composite wall of wood, fiberglass insulation, and plaster board, as
indicated in the sketch. On a cold day, the temperature and the convection heat trans-
fer coefficients are Tei=20°C, h;=30 W/m²K and Teo=-15°C, h,=60 W/m²K. The
wall surface area is 350 m?. Determine the total heat loss through the wall.
Conductivities are given as k,=0.038 W/m.K, k, =0.012 W/m.K, k,=0.17 W/m.K.
Glass fiber blanket
(28kg/m³), k,
Plaster board, k,
Plywood siding, k,
11
11
10mm E100mm E20mm
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