Innovative enhancements in solar still performance: A comprehensive study on wick-absorber configurations

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2024-10-10 DOI:10.1016/j.csite.2024.105273

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Abstract

This study introduces a new thermo-fluid analysis of using wick-absorbers to enhance solar still performance. Three configurations of wick absorbers were tested in a conventional single-slope solar still: (i) Case I: individual wick balls, (ii) Case II: zig-zag wick pattern, and (iii) Case III: rectangular wick array (grid-like pattern). The study evaluates multiple parameters, including saline water temperature, daily water productivity, Nusselt number, Sherwood number, thermal and exergy efficiencies, water cost, and payback period. The addition of an absorbing plate with an insulation layer led to lower saline water temperatures and shifted peak values. Compared to a traditional still, wick utilization enhanced water productivity by 45.8 %, 84.5 %, and 86 % for Cases I, II, and III, respectively, due to increased evaporation rates. This resulted in a relative enhancement in daily thermal efficiency by 64 %, 76 %, and 97.5 %, respectively. Additionally, four correlations were developed to describe Nusselt and Sherwood numbers, with a maximum deviation of 25 %. Economic analysis demonstrated cost-effectiveness, significantly reducing water cost and the payback period by 37 %, 39 %, and 44 % for Cases I, II, and III, respectively, compared to the conventional system.

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创新性地提高太阳能蒸发器的性能：关于灯芯吸附器配置的综合研究

本研究介绍了使用灯芯吸收器提高太阳能蒸发器性能的新热流体分析方法。在传统的单斜太阳能蒸发器中测试了三种配置的吸芯：(i) 情况 I：单个吸芯球；(ii) 情况 II：人字形吸芯模式；(iii) 情况 III：矩形吸芯阵列（网格状模式）。研究评估了多个参数，包括盐水温度、日水生产力、努塞尔特数、舍伍德数、热效率和放能效率、水成本和投资回收期。增加了带隔热层的吸水板后，盐水温度降低，峰值偏移。与传统蒸馏器相比，由于蒸发率的提高，情况 I、II 和 III 中的灯芯利用率分别提高了 45.8%、84.5% 和 86%。这使得日热效率分别相对提高了 64 %、76 % 和 97.5 %。此外，还开发了四种相关方法来描述努塞尔特数和舍伍德数，最大偏差为 25%。经济分析表明了成本效益，与传统系统相比，案例 I、II 和 III 的水成本和投资回收期分别大幅降低了 37%、39% 和 44%。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.