15.21 The cross section of a storm window is shown in the sketch. How much heat will be lost through a window measuring 1.83 m by 3.66 m on a cold day when the inside and outside air temperatures are, respectively, 295 and 250 K? Convective coefficients on the inside and outside surfaces of the window are 20 and 15 W/m² K, respectively. What temperature drop will exist across each of the glass panes? What will be the average temperature of the air between the glass panes? Air space 0.8 cm wide Window glass 0.32 cm thick

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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15.21 The cross section of a storm window is shown in the
sketch. How much heat will be lost through a window measuring
1.83 m by 3.66 m on a cold day when the inside and outside air
temperatures are, respectively, 295 and 250 K? Convective
coefficients on the inside and outside surfaces of the window
are 20 and 15 W/m² K, respectively. What temperature drop
will exist across each of the glass panes? What will be the
average temperature of the air between the glass panes?
Air
space
0.8 cm
wide
Window glass 0.32 cm thick
Transcribed Image Text:15.21 The cross section of a storm window is shown in the sketch. How much heat will be lost through a window measuring 1.83 m by 3.66 m on a cold day when the inside and outside air temperatures are, respectively, 295 and 250 K? Convective coefficients on the inside and outside surfaces of the window are 20 and 15 W/m² K, respectively. What temperature drop will exist across each of the glass panes? What will be the average temperature of the air between the glass panes? Air space 0.8 cm wide Window glass 0.32 cm thick
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