a 3 m high and 5 m wide wall consists of long 16 cm 22cm cross section horizontal bricks()separated by 3cm thick plaster layers side of the brick and a 3 cm thick plaster layers on each side of the brick and 3 cm thick rigid foam on the inner side of the wall,as shown in Fig.the indoor and the outdoor temperature are 20 c and 1 c ,and conversion heat transfer coefficients