A solar multi-stage desalination plant based on humidification compression with a heat recovery section was proposed in this study. Unlike conventional multi-stage plants, in this plant, water was reheated in the energy recovery section before entering the next humidifiers. The plant consisted of three packed columns (humidifiers), a polytropic compressor and three heat exchangers for energy recovery. A mathematical model was established to evaluate the impact of several operating parameters on the plant performance. The model was numerically solved, and a good conformity was found between the experimental data and numerical results. Average absolute error values of 2.12%, 0.25% and 0.38% were found for the outlet air humidity, outlet water temperature and outlet air temperature, respectively. In addition, the gained output ratio (GOR) and performance ratio (PR) for the proposed plant were found to be higher than those of conventional plants. In addition, higher inlet water temperature and lower pressure ratio and water-to-air mass flow ratio enhanced the GOR. On the other hand, the variation of pressure ratio had no significant influence on the PR, but higher inlet water temperature and lower water-to-air mass flow ratio increased the PR.

本研究提出了一种基于加湿压缩和热回收部分的太阳能多级海水淡化厂。与传统的多级工厂不同，在该工厂中，水在进入下一个加湿器之前在能量回收部分被重新加热。该工厂由三个填料塔（加湿器）、一个多变压缩机和三个用于能量回收的热交换器组成。建立了一个数学模型来评估几个运行参数对工厂性能的影响。对该模型进行了数值求解，发现实验数据与数值结果具有较好的一致性。出口空气湿度、出口水温和出口空气温度的平均绝对误差值分别为 2.12%、0.25% 和 0.38%。此外，发现拟建电厂的增产比 (GOR) 和性能比 (PR) 高于传统电厂。此外，较高的进水温度和较低的压力比和水气质量流量比提高了 GOR。另一方面，压力比的变化对PR没有显着影响，但较高的进水温度和较低的水气质量流量比增加了PR。