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Solar-powered ejector-based adsorption desalination system integrated with a humidification-dehumidification system
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2021-04-28 , DOI: 10.1016/j.enconman.2021.114113
Ehab S. Ali , Ramy H. Mohammed , Naef A.A. Qasem , Syed M. Zubair , Ahmed Askalany

The paper presents an integrated solar-driven desalination plant. It consists of an adsorption desalination (AD), a humidification-dehumidification (HDH) desalination, and two ejectors. The HDH unit reuses the silica gel AD cycle's waste energy to enhance the proposed integrated system's freshwater production rate. Two ejectors are also installed to improve freshwater productivity further. Two configurations are studied: with and without condenser/evaporator heat recovery (HR) circuit. In this regard, mathematical energy and cost models are built to examine the performance of solar-powered hybrid desalination systems installed in Assiut, Egypt, at different operating parameters. The model is validated against the available results in the literature. The solar irradiation, ambient temperature, adsorption cycle time, and HDH air mass flow rate on the cycle performance are studied. The highest freshwater is produced when the ratio between the mass flow rate of feed saline water and the air is about 1.4. When HR is applied, the specific daily water production (SDWP) reaches 83.1 m3/ton in June with a gained output ratio (GOR) of 2.7. The cost analysis shows that the specific cost of freshwater produced from the proposed desalination plant using HR loop is about $1.49/m3 when Solar Energy runs the proposed system. This particular water cost could decline to $0.54/m3 when waste heat is used.



中文翻译:

集成了加湿除湿系统的太阳能喷射器吸附脱盐系统

本文介绍了一个集成的太阳能驱动的海水淡化厂。它由吸附脱盐(AD),加湿除湿(HDH)脱盐和两个喷射器组成。HDH单元可重复利用硅胶AD循环的废能,以提高所提议的集成系统的淡水生产率。还安装了两个喷射器,以进一步提高淡水生产率。研究了两种配置:带和不带冷凝器/蒸发器热回收(HR)回路。在这方面,建立了数学能源和成本模型,以检查在不同运行参数下安装在埃及阿西尤特的太阳能混合淡化系统的性能。该模型已针对文献中的可用结果进行了验证。太阳辐射,环境温度,吸附循环时间,和HDH空气质量流量对循环性能的影响。当进料盐水和空气的质量流率之比约为1.4时,将产生最高的淡水。当应用HR时,每日特定水产量(SDWP)达到83.1 m6月为3 /吨,获得的产出比(GOR)为2.7。成本分析显示,当太阳能运行拟议的系统时,使用HR回路从拟议的海水淡化厂生产的淡水的具体成本约为1.49美元/ m 3。当使用废热时,这种特殊的水成本可能降至$ 0.54 / m 3

更新日期:2021-04-29
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