The wall of a building of length 21 m and height 3.5 m has an 8 mm thick gypsum board (k = 0.16 Wmí1 Kí1 ) on the inside. Next to it is a 130 mm thick layer of glass fiber insulation (k = 0.046 Wmí1...

The wall of a building of length 21 m and height 3.5 m has an 8 mm thick gypsum board (k = 0.16 Wmí1 Kí1 ) on the inside. Next to it is a 130 mm thick layer of glass fiber insulation (k = 0.046 Wmí1 Kí1 ) which is followed by a 150 mm thick layer of concrete (k = 0.42 Wmí1 Kí1 ). The outer face of the wall is made of brick (k = 0.5 Wmí1 Kí1 ) of thickness 100 mm. The wall has two 2 m by 1.2 m double-glazed windows. The 13 mm air gap between the two glass (k = 0.8 Wmí1 Kí1 ) panes of the window has a U-value of 6.1 Wmí2 Kí1 . The thickness of the glass is 6mm. The inside and outside air temperatures are 23°C and í2°C respectively. The outside and inside heat transfer coefficients are 28 Wmí2 Kí1 and 8 Wmí2 Kí1 respectively. Calculate total heat load due to heat conduction through the wall and the windows.