Q. A house wall may be approximated as two 1.2 cm layers of fiber nsulating board, an 8.0 cm layer of loosely packed asbestos, and a 10 cm ayer 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.C°, glass k-0.78 W/m.Co
Q. A house wall may be approximated as two 1.2 cm layers of fiber nsulating board, an 8.0 cm layer of loosely packed asbestos, and a 10 cm ayer 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.C°, glass k-0.78 W/m.Co
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 1.4P: 1.4 To measure thermal conductivity, two similar 1-cm-thick specimens are placed in the apparatus...
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