Research Paper : Desalination System with Humidification- Dehumidification of Air

A. A. El-Haroun;

In this work, a mathematical model to study the effect of various parameters like condenser surface area of heat transfer, humidifier area, heating capacity, type of packing material and flow rate of water on the performance of humidificationdehumidification desalination unit is used. It was found that, the productivity of the unit increases with the enlargement in surface area of heat transfer in humidifier when the other studied parameters remain constant. Increasing the flow rate of water, heater capacity or condenser area respectively at constant values of the other studied
parameters results in decay in productivity of the unit. The results show also that, using sponge as packing material will be better than clauses pieces or saw dust. The results
show also that, a desalination unit with 0.16 m2 humidifier area, 200 W heater capacities and 0.1 m2 condenser areas can give about 4.3 m3/day of fresh water. Therefore, the use
of such desalination unit, in small or gross scale, will be very attractive to supply remote areas in Egypt with fresh water for domestic uses or even for irrigation of lands.