Thermodynamic analysis and experimental study on humidification-dehumidification desalination system

被引：1
|
作者：
Cong S. [1 ]
Chen J.-M. [1 ]
Cai J.-C. [1 ]
Sun R.-S. [1 ]
Dong J.-H. [1 ]
Guo F. [1 ]
机构：
[1] School of Energy and Power Engineering, Dalian University of Technology, Dalian
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2019年 / 53卷 / 04期
关键词：
Desalination; Gained output ratio; Humidification-dehumidification; Specific thermal energy consumption; Thermodynamic analysis;
D O I：
10.3785/j.issn.1008-973X.2019.04.009
中图分类号：
学科分类号：
摘要：
A novel desalination system operated at low temperature and atmospheric pressure was constructed based on the mechanism of the humidification-dehumidification (HDH) process. The configuration and working principle of the system were described. The thermodynamic theories of the HDH process were analyzed based on assumptions. The effect of the operating parameters on the performance of the desalination system was analyzed, including the air circulation flow rate, the feed flow rate and the solution temperature. The experimental results indicated that the water yield of the system increased with the solution temperature and the feed flow rate. The water yield was observed to increase first and then decrease by increasing air circulation rate contrary to expectation. At the feed flow rate of 60 L/h, the feed temperature of 57 °C, and the air circulation rate of 180 m3/h, the maximum yield and salt rejection ratio of the system can reach 1.7 kg/h and more than 99.99%, respectively. When the feed temperature is 38 °C, the maximum gained output ratio and specific thermal energy consumption of the system can reach about 3.8 and 166 kW•h/m3, respectively. It's a competitive technology for the seawater desalination field due to the advantages of compact structure, modular design, easy operability, low maintenance cost, and great compatibility with renewable energy. Results show that the proposed system has great promise for decentralized small-scale water production applications, although it still has much room to be improved. © 2019, Zhejiang University Press. All right reserved.
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页码：684 / 691
页数：7
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