[1]A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold winter day, the convection heat transfer coefficients are ho = 60 W/m2K and hi = 30 W/m2 K. The total wall surface area is 350 m². Glass fiber blanket (28 kg/m), k, Plaster board, k, -Plywood siding, k, Inside Outside h, T= 20°C h T =-15°C 11 10 mm 100 mm- 20 mm a.) Determine the total rate of heat loss through the wall. A. 6.21 kW B. 5.21 kW C. 4.21 kW D. 3.21 kW b.) If the wind were blowing violently, raising ho to 300 W/m2 - K, determine the percentage increase in the rate of heat loss. A. 0.5% B. 0.1% C. 0.8% D. 0.6%
[1]A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold winter day, the convection heat transfer coefficients are ho = 60 W/m2K and hi = 30 W/m2 K. The total wall surface area is 350 m². Glass fiber blanket (28 kg/m), k, Plaster board, k, -Plywood siding, k, Inside Outside h, T= 20°C h T =-15°C 11 10 mm 100 mm- 20 mm a.) Determine the total rate of heat loss through the wall. A. 6.21 kW B. 5.21 kW C. 4.21 kW D. 3.21 kW b.) If the wind were blowing violently, raising ho to 300 W/m2 - K, determine the percentage increase in the rate of heat loss. A. 0.5% B. 0.1% C. 0.8% D. 0.6%
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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![[1] A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold
winter day, the convection heat transfer coefficients are ho = 60 W/m2 K and hi = 30 W/m2 K. The total wall surface
area is 350 m?.
Glass fiber blanket
(28 kg/m), k,
Plaster board, kp
Plywood siding, k,
Inside
Outside
h, T = 20°C
h, T=-15°C
11
10 mm
-100 mm
-20 mm
L,
a.) Determine the total rate of heat loss through the wall.
A. 6.21 kW
B. 5.21 kW
C. 4.21 kW
D. 3.21 kW
b.) If the wind were blowing violently, raising ho to 300 W/m2 - K, determine the percentage increase in the
rate of heat loss.
A. 0.5%
B. 0.1%
С. 0.8%
D. 0.6%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7d9a1f96-3005-4e5f-bac4-a8efffbb5958%2F5b2f7d05-d6b4-4d12-a90d-23245a8c8a28%2Fwne0k1_processed.png&w=3840&q=75)
Transcribed Image Text:[1] A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold
winter day, the convection heat transfer coefficients are ho = 60 W/m2 K and hi = 30 W/m2 K. The total wall surface
area is 350 m?.
Glass fiber blanket
(28 kg/m), k,
Plaster board, kp
Plywood siding, k,
Inside
Outside
h, T = 20°C
h, T=-15°C
11
10 mm
-100 mm
-20 mm
L,
a.) Determine the total rate of heat loss through the wall.
A. 6.21 kW
B. 5.21 kW
C. 4.21 kW
D. 3.21 kW
b.) If the wind were blowing violently, raising ho to 300 W/m2 - K, determine the percentage increase in the
rate of heat loss.
A. 0.5%
B. 0.1%
С. 0.8%
D. 0.6%
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