A refrigerator is placed near a partition wall of a room such that there is only a 4cm gap between the wall and the refrigerator surface facing the wall. The refrigerator surface is of 1.6m height and 0.8 m breadth and has a temperature of 22oC. The wall temperature is 30oC. Calculate the rate of heat gain by the refrigerator surface.
Assume the properties of air at 26oC:
v = 1.684×10-5 m2/s , k = 0.26 W/mK,
a = 2.21×10-5 m2/s, Pr = 0.7
Use the equation,
