A clear plastic window of a building has a thickness of 22 mm and a thermal conductivity of 0.17 Wmí1 Kí1 . It absorbs solar radiation at a uniform rate of 20 kWmí3 throughout the material. The...

A clear plastic window of a building has a thickness of 22 mm and a thermal conductivity of 0.17 Wmí1 Kí1 . It absorbs solar radiation at a uniform rate of 20 kWmí3 throughout the material. The outside and inside heat transfer coefficients are 25 Wmí2 Kí1 and 8 Wmí2 Kí1 respectively. The outside and inside ambient temperatures are 25°C and 15°C respectively. Calculate (i) the inside and outside wall surface temperatures, and (ii) the rate of heat flow into the room.