Experimental investigation of a solar desalination performance based on humidification-dehumidification technique with air and water closed cycle

In this study, the performance of solar desalination by humidification-dehumidification of closed air and water in Ahvaz city was investigated. This desalination includes a collector, condenser, salty water, freshwater tanks, air blower, and water pump. The evaluation of the system was done at three levels of air velocity (3, 4, and 5 m/s) and at three pump discharge levels (2, 4, and 6 liters/min). The results showed that the lowest daily average of evaporative efficiency was about 56%, which obtained at air velocity of 3 m/s and water discharge of 2 liters/min, and the highest value of that was about 79%, which obtained at air velocity of 5 m/s and water discharge of 6 liters/min. Also, the highest daily average of condenser efficiency was 21.52%, which was obtained at the air velocity of 3 m/s and discharge water of 6 liters/min. The lowest freshwater was obtained at air velocity of 5 m/s and 2 liters/min, and the highest value was obtained at air velocity of 3 m/s and 6 liters/min.