Abstract In this study, the performance of a novel humidification dehumidification (HDH) system powered by waste heat for the production of freshwater from domestic wastewater is investigated experimentally. The waste heat rejected from the domestic air conditioning unit is utilized as the process air for powering the HDH system. The influence of the major parameters such as process air temperature, humidity ratio, wastewater flow rate and coolant liquid flow rate were evaluated to identify the optimum conditions for maximum freshwater productivity. Further, the humidification potential of cellulose paper and Polyvinyl Chloride (PVC) humidifier materials were evaluated comparatively to identify the effective humidifier material for maximum productivity. Experimental results indicated that the maximum achievable yield is about 7.1 kg/h with the use of cellulose material for an optimum flow condition of 0.5 m3/h and 0.9 m3/h in humidifier and dehumidifier units respectively. Further, the maximum freshwater productivity, gained output ratio (GOR) and cost of freshwater production are 4.7 kg/kWh, 1.27 and $0.0409/kg respectively. A significant decrement in the contaminants were identified during water quality analysis and the obtained results indicated that the developed HDH system could be utilized for local production of freshwater with competent use of waste heat and wastewater simultaneously.

中文翻译：

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废热动力加湿除湿系统废水制淡水实验参数研究

摘要 在这项研究中，通过实验研究了一种以废热为动力的新型加湿除湿 (HDH) 系统，用于从生活废水中生产淡水的性能。从家用空调装置排出的废热被用作为 HDH 系统供电的工艺空气。对工艺空气温度、湿度比、废水流量和冷却液流量等主要参数的影响进行了评估，以确定最大淡水生产率的最佳条件。此外，对纤维素纸和聚氯乙烯 (PVC) 加湿器材料的加湿潜力进行了比较评估，以确定可实现最大生产率的有效加湿器材料。实验结果表明，最大可达到的产量约为 7。1 kg/h 使用纤维素材料，在加湿器和除湿器装置中分别达到 0.5 m3/h 和 0.9 m3/h 的最佳流量条件。此外，最大淡水生产力、增产率 (GOR) 和淡水生产成本分别为 4.7 kg/kWh、1.27 和 $0.0409/kg。在水质分析过程中发现污染物显着减少，所得结果表明开发的 HDH 系统可用于当地生产淡水，同时充分利用废热和废水。