Optimization and comparative study of hemispherical solar stills using welded wire mesh as a secondary porous absorber– Part II: Impact of varying positions in water basins

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2025-05-16 DOI:10.1016/j.solmat.2025.113688

Yaser H. Alahmadi , Mohammed El Hadi Attia , K. Harby , Mohamed Abdelgaied

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引用次数: 0

Abstract

In this part, Part II, of a two-part investigation, an experimental study was conducted to improve the performance of hemispherical solar stills by introducing a novel and cost-effective technique. This approach involved integrating a welded wire mesh as an additional porous absorber within the water basin. Three configurations of the wire mesh placement were examined (at the base, in the middle, and submerged under the water surface) to determine the optimal position for maximizing daily water production. The proposed wire mesh functions as both a heat storage medium and a secondary porous absorber, increasing the surface area and enhancing the absorption, transmission, and storage of heat energy, thereby improving the overall productivity. The wire steel mesh used in this study is readily available and can be easily obtained from industrial and workshop scrap materials. Four hemispherical solar stills were designed and tested. Four hemispherical solar stills were designed and tested. The first served as a reference, while the others incorporated the proposed wire meshes at three designated positions. Results showed that positioning the porous absorber at the water surface yielded the highest distillate output and best performance. The yield of distillers with a second porous absorber at the base, middle, and surface reached 5.38, 7.00, and 8.06 lm⁻²day⁻¹, corresponding to increases of 7.59, 40.08, and 61.11 %, respectively, compared to the conventional design. Furthermore, improvements in energy and exergy efficiencies ranged from 7.49 to 60.48 % and from 16.20 to 119.46 %, respectively, depending on the absorber position. Economic analysis indicated a reduction in water production costs by 1.611–34.27 %, alongside a decrease in CO₂ emissions from 3.47 to 2.40 tons, and a significant reduction in energy payback time by 49.29–60.19 %.

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采用焊接网作为二次多孔吸收器的半球形太阳能蒸馏器的优化和比较研究。第二部分：不同位置对流域的影响

在这一部分，第二部分，两部分的调查，进行了一项实验研究，以提高半球形太阳能蒸馏器的性能，通过引入一种新颖的和经济有效的技术。这种方法包括在水盆内集成一个焊接钢丝网作为额外的多孔吸收器。研究人员检查了三种金属丝网的布置方式（在底部、中间和水下），以确定最大限度地提高日产水量的最佳位置。所提出的金属丝网既是储热介质，又是二次多孔吸收体，增加了表面面积，增强了热能的吸收、传递和储存，从而提高了整体生产率。本研究中使用的钢丝网是现成的，可以很容易地从工业和车间废料中获得。设计并测试了四个半球形太阳能蒸馏器。设计并测试了四个半球形太阳能蒸馏器。第一个作为参考，而其他的则在三个指定的位置合并了拟议的铁丝网。结果表明，将多孔吸收器放置在水面上可以获得最高的馏分产量和最佳的性能。在底部、中间和表面安装第二个多孔吸收塔的蒸馏器产率分别达到5.38、7.00和8.06 lm−2day−1，比常规设计分别提高了7.59%、40.08%和61.11%。此外，能量和火用效率的改善范围分别为7.49%至60.48%和16.20%至119.46%，这取决于吸收器的位置。经济分析表明，采水成本降低了1.611 - 34.27%，二氧化碳排放量从3.47吨减少到2.40吨，能源投资回收期显著缩短了49.29 - 60.19%。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.