الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Water desalination by using solar energy based on humidification – dehumidification processes has confirmed to be an efficient procedure of using solar energy for achieving freshwater from saline water. This procedure presents several advantages such as flexibility, simplicity, modest installation, operating costs, and a possibility of using low - temperature energy sources. An experimental study of a solar desalination system based on jet humidification with an auxiliary perpendicular hot air stream was carried out at Suez city, Egypt 29.9668°N, 32.5498°E. The tests were done from May to October 2016. The experimental setup consists mainly of three parts; humidifier-dehumidifier section, saline water cycle, and air cycle. The humidifier-dehumidifier section includes six brass spraying nozzles at different situations. The saline water cycle contains 3 m 2 evacuated tube solar collector as a heat source which, includes storage tank that about 200 liters and circulation pump. The air cycle contains 1.5 m 2 flat plate solar collector for heating air. The air is circulated by forced circulation using an air blower. The effects of nozzles situations and nozzle diameter with and without hot air stream on freshwater productivity were monitored. The results show that; the lateral and downward jets from narrow nozzles have more productivities than other situations. The hot air stream has to be adapted at a certain flow rate to get high values of productivity. The system productivity is (5.6 L/m2 ), the estimated cost is (0.030063 $/L) and the efficiency is 32.8 %.