为解决增湿除湿海水淡化技术高能耗问题,提出了一种新型热泵增湿除湿海水淡化系统,将热泵蒸发器用作二级除湿器,并增设过冷器对深度除湿后的空气进行复温。选用R134a为热泵工质,通过数学模型的建立与求解,分析讨论了制冷剂充注量、进料海水温度和液气质量比对系统性能的影响,并与现有文献中的热泵增湿除湿海水淡化系统性能进行对比。结果表明,系统存在最佳的制冷剂充注量、进料海水温度和液气质量比;当进料海水流量为720 kg/h时,最佳制冷剂充注量为240 kg/h,对应的最佳淡水产量和造水比分别为28.83 kg/h和7.21,均优于文献报道值,表明新系统具备实际产品开发的价值和广阔的应用前景。

To address the issue of high energy consumption in humidification-dehumidification seawater desalination technology,this paper introduces a novel heat pump humidification-dehumidification seawater desalination system that uses heat pump evaporator as a second-stage dehumidifier,and adds a sub-cooler to reheat the air after deep dehumidification.R134a is chosen as the working fluid for heat pump,and the impact of refrigerant charge,feed seawater temperature and mass ratio of liquid-gas on the system performance is analyzed and studied through the establishment and solution of a mathematical model.The performances of the heat pump humidification-dehumidification desalination system are compared with those presented in the existing literature.Results indicate the presences of the optimal refrigerant charge,feed seawater temperature,and gas-liquid mass ratio for the system.The optimal refrigerant charge is 240 kg·h^-1 when feed seawater flow rate is 720 kg·h^-1.As a result,the optimal freshwater yield and water production ratio are 28.83 kg·h^-1 and 7.21,respectively,both surpassing those reported in the literature,indicating that the novel system holds practical value for product development and offers broad application prospects.

王炳东(1998-),男,硕士生,研究方向为热泵增湿除湿,w15690865513@163.com;沈九兵(1987-),男,博士,副教授,研究方向为制冷及热泵技术、空气调节及热泵水处理,通讯联系人,shenjiubing@just.edu.cn。