Experimental study on passive cooling of photovoltaic panel by harvesting atmospheric water using hygroscopic salt

IF 4.4 2区工程技术 Q2 ENERGY & FUELS

Energy for Sustainable Development Pub Date : 2025-05-20 DOI:10.1016/j.esd.2025.101756

Jegathishkumar R , Prabaahar A , Hari Govind S

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Abstract

The electrical performance of solar photovoltaic panel can be enhanced by reducing its operating temperature at daytime. An experimental investigation is carried out in the local region where humidity is very high with relative humidity of about 90 %. A passive cooling system with CaCl₂ hygroscopic salt with additive is considered. The salt compound facilitates water supply for panel cooling by convection and evaporative cooling method. The performance of panel with desorption cooling method is compared against the panel without any cooling. Further, the study is extended to find the influence of additive and its weight percentage on power output of solar panels. The observation revealed that the panel temperature reduced about 3.1 % thus increased power output by 17.38 %. From the experimentation, it is concluded that reducing the temperature not results into increased power output always because some shortcomings in cooling method affects solar irradiation. The sedimentation of salt reduces solar irradiation and cleaning of panel surface becomes mandatory.

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利用吸湿盐收集大气水对光伏板进行被动冷却的实验研究

降低太阳能光伏板白天的工作温度可以提高其电性能。在相对湿度约为90%的高湿地区进行了试验研究。研究了一种带添加剂的CaCl2吸湿盐被动冷却系统。盐化合物有利于通过对流和蒸发冷却方法为面板冷却供水。对采用解吸冷却方法的面板与未采用解吸冷却方法的面板的性能进行了比较。进一步研究了添加剂及其重量百分比对太阳能电池板输出功率的影响。观察发现，面板温度降低了约3.1%，从而增加了17.38%的功率输出。实验结果表明，由于冷却方法的一些缺陷影响了太阳辐照，降低温度并不能提高输出功率。盐的沉淀减少了太阳照射，面板表面的清洁成为强制性的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy for Sustainable Development ENERGY & FUELS-ENERGY & FUELS

CiteScore

8.10

自引率

9.10%

发文量

187

审稿时长

6-12 weeks

期刊介绍： Published on behalf of the International Energy Initiative, Energy for Sustainable Development is the journal for decision makers, managers, consultants, policy makers, planners and researchers in both government and non-government organizations. It publishes original research and reviews about energy in developing countries, sustainable development, energy resources, technologies, policies and interactions.