A building wall is made of 200 mm of poured concrete on the outside, 100 mm of fiberglass insulation in the middle, and 15 mm of sheetrock on the inside. (kconcrete = 1.5 W/m-C, kinsulation = 0.05 W/m-C, ksheetrock = 0.17 W/m-C.)
a) Under steady-state conditions, how much heat will be transferred per square meter of wall, if the outside air is at 33 C, the inside air is at 21 C, and the convection coeffcients are houtside = 15 W/m2-C and hinside = 5 W/m2C?
b) What is the temperature of the inside wall surface - the visible face of the sheetrock (under the same conditions, of course) ?