Question: A 1 2 - m - long and 5 - m - high wall is constructed of two layers of 1 - cm - thick

A 12-m-long and 5-m-high wall is constructed of two layers of 1-cm-thick sheetrock (k =0.17 W/mK) spaced 16 cm by wood studs (k =0.11 W/mK) whose cross section is 16 cm 5 cm. The studs are placed vertically 60 cm apart, and the space between them is filled with fiberglass insulation (k =0.034 W/mK). The house is maintained at 20C, and the ambient temperature outside is 9C. Take the heat transfer coefficients at the inner and outer surfaces of the house to be 8.3 and 34 W/m2K, respectively.
Determine the thermal resistance of the wall considering a representative section of it.
The thermal resistance of the wall is C/W.

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