- 2 A 4 M High And 6 M Wide Wall Fig 1 Consist Of A Long 18 Cm X 30 Cm Cross Section Of Horizontal Bricks Tk 0 72 W 1 (121.68 KiB) Viewed 38 times
2. A 4-m-high and 6-m-wide wall (Fig. 1) consist of a long 18-cm x 30-cm cross section of horizontal bricks tk - 0.72 W/m. K) separated by 3-cm-thick plaster layers (k - 0.22 W/m. K). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid foam (k = 0.026 W/m. K) on the inner side of the wall. The indoor and the outdoor temperatures are 22 °C and -4 °C, and the convection heat transfer coefficients on the inner and the outer sides are hi-10 W/m. K and he = 10 W/m?.K, respectively. Assuming one- dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall. (35 points) Foam Plaster lisen .2LRIC T1.5 cm Brick ) 30cm 30 cm (21072 1.026 -4°C h zlo 15 cm 1 T loscm 18 cm +20mm1rzenal-18cm - l b2cars Fig. 1 Ru Ro