Condensation occurs on a bathroom window at a rate of 0.5 kg per hour. If the bathroom air is at 26°C and fully saturated with water vapour, what is the rate of heat transfer on the window surface if the inside surface is maintained at 5°C.
Heat Transfer through Condensation per hour = 2440 KJ/Kg * 0.5 Kg/hr = 1220 KJ/Kg per hour
Specific Heat Capacity of Water = 4.18 KJ/Kg
Heat Transfer of water from 26 °C to 5 °C = (26 – 5) * 4.18 KJ/Kg * 0.5 kg/hr = 43.89 KJ/Kg per hour
Total heat transfer per hour = 1220 KJ/Kg + 43.89 KJ/Kg = 1263.89 KJ/Kg per hour
To kW 1263.89 x 0.0002777777778 = 0.351kW