Abstract A new design for heat pump integrated humidification-dehumidification (HDH-HP) desalination cycles was proposed in the current experimental study. An evaporative condenser was designed and fabricated instead of a separate humidifier, heater, and air/water-cooled condensers find in previous HDH-HP systems. Meanwhile, the air dehumidification process in this work directly occurred inside the heat pump evaporator. The effect of several operating parameters such as ambient wet-bulb temperature, spraying saline water and airflow rates, compressor speed, superheat, and evaporator saturation temperature control modes of the electronic expansion valve (EEV) on freshwater production and GOR were studied. Analyzing the experimental results indicated that the system productivity and GOR reached 1.08 kg/h and 2.00, respectively. Higher freshwater produced at decreased airflow rates and increased ambient wet-bulb temperatures, spraying water flow rate and compressor speeds. Moreover, it was observed that the system performance enhances at higher adjusted evaporator saturated temperatures and lower superheats in the EEV controller. The experimental data for cooling capacity, compressor power, and current consumption was in agreement with polynomials provided by the compressor manufacturer. Additionally, the cost of generated freshwater was obtained as 0.019 $/L.

中文翻译：

---

基于蒸发式冷凝器的组合式热泵加湿除湿海水淡化系统的热性能评估

摘要 在当前的实验研究中，提出了一种新的热泵加湿-除湿（HDH-HP）海水淡化循环设计。设计和制造了蒸发式冷凝器，而不是以前 HDH-HP 系统中的单独加湿器、加热器和空气/水冷冷凝器。同时，这项工作中的空气除湿过程直接发生在热泵蒸发器内部。研究了环境湿球温度、喷洒盐水和气流速率、压缩机转速、过热度和电子膨胀阀 (EEV) 的蒸发器饱和温度控制模式等几个运行参数对淡水产量和 GOR 的影响。分析实验结果表明，系统生产率和 GOR 分别达到 1.08 kg/h 和 2.00。在降低气流速率和提高环境湿球温度、喷洒水流速和压缩机速度的情况下产生更多淡水。此外，还观察到系统性能在 EEV 控制器中更高的调节蒸发器饱和温度和更低的过热度下增强。冷却能力、压缩机功率和电流消耗的实验数据与压缩机制造商提供的多项式一致。此外，产生的淡水成本为 0.019 美元/升。冷却能力、压缩机功率和电流消耗的实验数据与压缩机制造商提供的多项式一致。此外，产生的淡水成本为 0.019 美元/升。冷却能力、压缩机功率和电流消耗的实验数据与压缩机制造商提供的多项式一致。此外，产生的淡水成本为 0.019 美元/升。