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A house has a composite wall of wood, fiberglass insulation and plaster board. On a cold winter day, the convection heat transfer coefficients are ho = 60 W/m²/K and h₁ = 30 W/m²/K. Total wall surface is 350 m². Thermal conductivity: fiberglass k = 0.038 W/m/K; wood ks = 0.12 W/m/K; plaster board kp = 0.17 W/m/K. (a) Determine a symbolic expression for the total thermal resistance of the wall, including inside and outside convection effects for the prescribed conditions. (10') (b) Determine the total heat loss through the wall. (10') Plaster board, k Inside h₁, T∞,i= 20°C 111 10 mm Glass fiber blanket (28 kg/m³), kb Lp -100 mm- Lb Ls - Plywood siding, k Outside ho, Too, o = -15°C ↑↑↑ - 20 mm

A house has a composite wall of wood, fiberglass insulation and plaster board. On a cold winter day, the convection heat transfer coefficients are ho = 60 W/m²/K and h₁ = 30 W/m²/K. Total wall surface is 350 m². Thermal conductivity: fiberglass k = 0.038 W/m/K; wood ks = 0.12 W/m/K; plaster board kp = 0.17 W/m/K. (a) Determine a symbolic expression for the total thermal resistance of the wall, including inside and outside convection effects for the prescribed conditions. (10') (b) Determine the total heat loss through the wall. (10') Plaster board, k Inside h₁, T∞,i= 20°C 111 10 mm Glass fiber blanket (28 kg/m³), kb Lp -100 mm- Lb Ls - Plywood siding, k Outside ho, Too, o = -15°C ↑↑↑ - 20 mm

Elements Of Electromagnetics
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 house has a composite wall of wood, fiberglass insulation and plaster board. On a cold winter day, the convection heat transfer coefficients are h, = 60 W/m²/K and h₁ = 30 W/m²/K. Total wall surface is 350 m². Thermal conductivity: fiberglass k, = 0.038 W/m/K; wood k, = 0.12 W/m/K; plaster board kp = 0.17 W/m/K. (a) Determine a symbolic expression for the total thermal resistance of the wall, including inside and outside convection effects for the prescribed conditions. (10') (b) Determine the total heat loss through the wall. (10') Plaster board, kp Inside h₁, T∞, i = 20°C ^^^ 10 mm Glass fiber blanket (28 kg/m³), k Lp -100 mm- Lb L₂ Plywood siding, ks Outside ho, T∞, o = -15°C 111 20 mm
Transcribed Image Text:A house has a composite wall of wood, fiberglass insulation and plaster board. On a cold winter day, the convection heat transfer coefficients are h, = 60 W/m²/K and h₁ = 30 W/m²/K. Total wall surface is 350 m². Thermal conductivity: fiberglass k, = 0.038 W/m/K; wood k, = 0.12 W/m/K; plaster board kp = 0.17 W/m/K. (a) Determine a symbolic expression for the total thermal resistance of the wall, including inside and outside convection effects for the prescribed conditions. (10') (b) Determine the total heat loss through the wall. (10') Plaster board, kp Inside h₁, T∞, i = 20°C ^^^ 10 mm Glass fiber blanket (28 kg/m³), k Lp -100 mm- Lb L₂ Plywood siding, ks Outside ho, T∞, o = -15°C 111 20 mm
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