Q. A house wall may be approximated as two 1.2 cm layers of fiber insulating board, an 8.0 cm layer of loosely packed asbestos, and a 10 cm layer of common brick, the high and width of the wall are 3 and 5m respectively. The wall contain a window with single glass plate 5 mm thick, the high and width of the window are 1 and 1.5m respectively. If the inside and outside of wall temperature are 15 and 45 C° respectively, calculate the heat-transfer for this arrangement. Note: for fiberglass k = 0.038 W/m.Co, asbestos k = 0.154 W/m.Co, brick k-0.69 W/m.Co, glass k=0.78 W/m.Co
Q. A house wall may be approximated as two 1.2 cm layers of fiber insulating board, an 8.0 cm layer of loosely packed asbestos, and a 10 cm layer of common brick, the high and width of the wall are 3 and 5m respectively. The wall contain a window with single glass plate 5 mm thick, the high and width of the window are 1 and 1.5m respectively. If the inside and outside of wall temperature are 15 and 45 C° respectively, calculate the heat-transfer for this arrangement. Note: for fiberglass k = 0.038 W/m.Co, asbestos k = 0.154 W/m.Co, brick k-0.69 W/m.Co, glass k=0.78 W/m.Co
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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Transcribed Image Text:Q. A house wall may be approximated as two 1.2 cm layers of fiber
insulating board, an 8.0 cm layer of loosely packed asbestos, and a 10 cm
layer of common brick, the high and width of the wall are 3 and 5m
respectively. The wall contain a window with single glass plate 5 mm thick,
the high and width of the window are 1 and 1.5m respectively. If the inside
and outside of wall temperature are 15 and 45 C° respectively, calculate the
heat-transfer for this arrangement. Note: for fiberglass k = 0.038 W/m.Cº,
asbestos k = 0.154 W/m.Co, brick k-0.69 W/m.Co, glass k-0.78 W/m.Co
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