A window is made up of two panes of glass (with surface temperatures of 15 oC and 5 oC) that are separated by a gap of 3 cm. The said window has a height of 2 m and a width of 5 m. Initially, the gap is filled with air (flowing via temperature gradient). Then, this air space is partially evacuated such that the pressure is already 0.1 mpa. This is done to lessen the heat transfer between the two panes of glass. Both glass surfaces have an emissivity of 0.9. Calculate the rate of heat transfer (W) through the panes.
A window is made up of two panes of glass (with surface temperatures of 15 oC and 5 oC) that are separated by a gap of 3 cm. The said window has a height of 2 m and a width of 5 m. Initially, the gap is filled with air (flowing via temperature gradient). Then, this air space is partially evacuated such that the pressure is already 0.1 mpa. This is done to lessen the heat transfer between the two panes of glass. Both glass surfaces have an emissivity of 0.9. Calculate the rate of heat transfer (W) through the panes.
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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A window is made up of two panes of glass (with surface temperatures of 15 oC
and 5 oC) that are separated by a gap of 3 cm. The said window has a height of
2 m and a width of 5 m. Initially, the gap is filled with air (flowing via temperature
gradient). Then, this air space is partially evacuated such that the pressure is
already 0.1 mpa. This is done to lessen the heat transfer between the two panes of
glass. Both glass surfaces have an emissivity of 0.9. Calculate the rate of heat
transfer (W) through the panes.
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