A thermopane window consists of two pieces of glass The window separates room air at 20°C from outside ambient air at -10°C. The convection coefficient associated with the inner (room-side) surface is 10 W/m²K. If the convection coefficient associated with the outer (ambient) air is ho 80 W/mK, what is the heat loss through a window that is 0.8 m long by 0.5 m wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant. Take glass thermal conductivity K-1.4 W/m.K, air thermal conductivity K,-0.0245 W/m.K [3.
A thermopane window consists of two pieces of glass The window separates room air at 20°C from outside ambient air at -10°C. The convection coefficient associated with the inner (room-side) surface is 10 W/m²K. If the convection coefficient associated with the outer (ambient) air is ho 80 W/mK, what is the heat loss through a window that is 0.8 m long by 0.5 m wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant. Take glass thermal conductivity K-1.4 W/m.K, air thermal conductivity K,-0.0245 W/m.K [3.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.68P
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![Figure (1)
Q2/ A thermopane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm thick.
The window separates room air at 20°C from outside ambient air at -10°C. The convection coefficient
associated with the inner (room-side) surface is 10 W/m².K. If the convection coefficient associated with the
outer (ambient) air is ho-80 W/mK, what is the heat loss through a window that is 0.8 m long by 0.5 m
wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant. Take glass thermal
conductivity K-1.4 W/m.K, air thermal conductivity K,-0.0245 W/m.K
[33](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffcad6938-eaa4-490b-8d07-b4c50f34d49f%2F43c2d813-652e-416e-9548-87a7a7406a7c%2F3edaxi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Figure (1)
Q2/ A thermopane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm thick.
The window separates room air at 20°C from outside ambient air at -10°C. The convection coefficient
associated with the inner (room-side) surface is 10 W/m².K. If the convection coefficient associated with the
outer (ambient) air is ho-80 W/mK, what is the heat loss through a window that is 0.8 m long by 0.5 m
wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant. Take glass thermal
conductivity K-1.4 W/m.K, air thermal conductivity K,-0.0245 W/m.K
[33
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