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In: Mechanical Engineering

A wall is constructed of two layers of 2-cm-thick sheetrock (k = 0.17 W/m·K) separated by...

A wall is constructed of two layers of 2-cm-thick sheetrock (k = 0.17 W/m·K) separated by 16 cm by wood studs (k = 0.11 W/m·K) whose width is 5 cm. The studs are placed vertically 55 cm apart, and the space between them is filled with stagnant air (16 by 55 cm) as insulation (k = 0.026 W/m·K). Pay attention to the measurements!

The house is maintained at 20°C and the ambient temperature outside is ?9°C. Taking the heat transfer coefficients at the inner and outer surfaces of the house to be 8.3 and 34 W/m2·K, respectively, determine the thermal resistance of the wall in C/W considering arepresentative section (1m x 0.60 m) of the wall to three significant digits. That is from stud end to the other stud end...so a single stud in your section..see plan view below and an example to the right without the sheetrock.

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samet mamat answered 2 years ago
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