Abstract The present work aims to enhance the performance of a solar energy-driven HDH desalination system. An experimental apparatus consisting of a novel closed-loop pulsating heat pipe (CLPHP) assisted by a bubble basin HDH system was investigated. To evaluate the productivity of the fresh water, tests have been properly designed and conducted in outdoor and indoor modes during June and July of 2020, under local weather conditions of Mashhad, Iran. A closed air-heated configuration is introduced into the HDH desalination system, to recover the condensation latent heat. The air leaving the dehumidifier is pre-heated and pre-humidified using CLPHP before entering the humidifier of the desalination unit. Also, an air injection system is used to enhance the mass and heat transfer rate by generating bubbles. In the experiments, the influence of the operating conditions such as radiation and air mass flow rate on the performance of the desalination unit was investigated. Furthermore, a comparison between the bubble basin and bubble column types was carried out. Based on the results, the bubble basin type presented a higher yield compared to the bubble column type that was obtained as 0.83 and 0.70 (kg/(hr.m2)), respectively. Besides, it was observed that by increasing the radiation and air mass flow rate, productivity is improved. The maximum obtained yield of the proposed system was achieved as 8.7 L/(day.m2).

中文翻译：

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闭环脉动热管便携式泡盆加湿/除湿海水淡化装置的实验研究

摘要 目前的工作旨在提高太阳能驱动的 HDH 海水淡化系统的性能。研究了由气泡盆 HDH 系统辅助的新型闭环脉动热管 (CLPHP) 组成的实验装置。为了评估淡水的生产力，在 2020 年 6 月和 7 月期间，在伊朗马什哈德当地的天气条件下，在室外和室内模式下进行了适当的设计和测试。在 HDH 海水淡化系统中引入封闭式空气加热配置，以回收冷凝潜热。离开除湿器的空气在进入脱盐装置的加湿器之前使用 CLPHP 进行预热和预加湿。此外，空气喷射系统用于通过产生气泡来提高传质和传热速率。在实验中，研究了辐射和空气质量流量等操作条件对脱盐装置性能的影响。此外，还对气泡盆和气泡柱类型进行了比较。根据结果​​，与分别为 0.83 和 0.70 (kg/(hr.m2)) 的气泡柱型相比，气泡盆型的产量更高。此外，据观察，通过增加辐射和空气质量流量，生产率得到提高。所提出系统的最大获得产量为 8.7 L/(day.m2)。与分别为 0.83 和 0.70 (kg/(hr.m2)) 的气泡柱型相比，气泡盆型的产量更高。此外，据观察，通过增加辐射和空气质量流量，生产率得到提高。所提出系统的最大获得产量为 8.7 L/(day.m2)。与分别为 0.83 和 0.70 (kg/(hr.m2)) 的气泡柱型相比，气泡盆型的产量更高。此外，据观察，通过增加辐射和空气质量流量，生产率得到提高。所提出系统的最大获得产量为 8.7 L/(day.m2)。