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sider a 0.8 m and 1.5 m wide double pane window consisting of two (5) mm thick layers of glass (k = 0.78 W/m.k) separated by a (11) mm wide stagnant air space 0.026 W/m.k). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface (T₁) for a day during which the m is maintained at (23)°C while the temperature of the outdoors is (-12)°C. Take the convention heat transfer coefficients on the inner and outer surfaces of the dow to be h₁ 10 W/m². °C and h₂ = 40 W/m². °C,which includes the effects of radiation. Glass Dom mperatu www R₁ Air Glass T Ain Toutdoor Temperature R₁ R₂ R₂ R. T e: o calculate the heat transfer rate, you need to calculate individual thermal resistance and finally total resistance. Please enter your answers to 2 significant figures.

sider a 0.8 m and 1.5 m wide double pane window consisting of two (5) mm thick layers of glass (k = 0.78 W/m.k) separated by a (11) mm wide stagnant air space 0.026 W/m.k). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface (T₁) for a day during which the m is maintained at (23)°C while the temperature of the outdoors is (-12)°C. Take the convention heat transfer coefficients on the inner and outer surfaces of the dow to be h₁ 10 W/m². °C and h₂ = 40 W/m². °C,which includes the effects of radiation. Glass Dom mperatu www R₁ Air Glass T Ain Toutdoor Temperature R₁ R₂ R₂ R. T e: o calculate the heat transfer rate, you need to calculate individual thermal resistance and finally total resistance. Please enter your answers to 2 significant figures.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Consider a 0.8 m and 1.5 m wide double pane window consisting of two (5) mm thick layers of glass (k = 0.78 W/m.k) separated by a (11) mm wide stagnant air space (k= 0.026 W/m.k). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface (T₁) for a day during which the room is maintained at (23)°C while the temperature of the outdoors is (-12)°C. Take the convention heat transfer coefficients on the inner and outer surfaces of the window to be h₁ = 10 W/m². °C and h₂ = 40 W/m². °C, which includes the effects of radiation. Glass Room Temperatu T₁ 12 Air Ain Glass T₁ outdoor Temperature ↓↓↓ T1 R₁ R₁ R₂ R3 R, Tx2 Note: 1. To calculate the heat transfer rate, you need to calculate individual thermal resistance and finally total resistance. 2. Please enter your answers to 2 significant figures.
Transcribed Image Text:Consider a 0.8 m and 1.5 m wide double pane window consisting of two (5) mm thick layers of glass (k = 0.78 W/m.k) separated by a (11) mm wide stagnant air space (k= 0.026 W/m.k). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface (T₁) for a day during which the room is maintained at (23)°C while the temperature of the outdoors is (-12)°C. Take the convention heat transfer coefficients on the inner and outer surfaces of the window to be h₁ = 10 W/m². °C and h₂ = 40 W/m². °C, which includes the effects of radiation. Glass Room Temperatu T₁ 12 Air Ain Glass T₁ outdoor Temperature ↓↓↓ T1 R₁ R₁ R₂ R3 R, Tx2 Note: 1. To calculate the heat transfer rate, you need to calculate individual thermal resistance and finally total resistance. 2. Please enter your answers to 2 significant figures.
R₁ = R conv, 1 R₁,3 = R glass R₂ = Rair R₁ = R conv, 2 RTotal = What is the rate of heat transfer (W)? Q/A = W °C/W °C °C/W °C/W °C/W °C/W What is the temperature of the inner surface? T₁ =
Transcribed Image Text:R₁ = R conv, 1 R₁,3 = R glass R₂ = Rair R₁ = R conv, 2 RTotal = What is the rate of heat transfer (W)? Q/A = W °C/W °C °C/W °C/W °C/W °C/W What is the temperature of the inner surface? T₁ =
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