Investigating the Role of Geometry in Solar Water Heating: A Case Study of Cylindrical and Frustum Buckets

IF 3.4 3区工程技术 Q3 ENERGY & FUELS

Energy Science & Engineering Pub Date : 2025-05-26 DOI:10.1002/ese3.70156

Pankaj Dumka, Nitesh Pandey, Dhananjay R. Mishra, Farruh Atamurotov, Ahmed Mohsin Alsayah, Nima Khalilpoor

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Abstract

This study studies the effect of bucket shape and geometry on the performance of solar water heating systems. Three plexiglass (PMMA) buckets were chosen: cylindrical, frustum, and inverted frustum. Each bucket has a capacity of 13 L and 3 mm wall thickness. The primary objective is to identify the most effective bucket shape and surface treatment for maximizing thermal efficiency under winter solar conditions. The buckets were evaluated in two configurations: with black-painted bases and with half the lateral surface painted black. Experiments measured solar intensity, water temperature, and heat transfer parameters using thermocouples and a solar power meter. Results revealed that the frustum-shaped bucket achieved the highest water temperature increase, reaching 47.5°C after 4 h, compared to 43.2°C and 41.8°C for the inverted frustum and cylindrical shapes, respectively. Numerical analysis validated the experimental results and provided insights into convective, evaporative, and radiative heat transfer. The outcomes emphasize the critical role of geometric optimization and surface modification in solar thermal design, offering a cost-effective and sustainable alternative for rural energy needs.

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研究几何在太阳能热水中的作用：以圆柱形和锥形桶为例

本文研究了桶形和几何形状对太阳能热水系统性能的影响。三种有机玻璃（PMMA）桶被选择：圆柱形、截锥体和倒截锥体。每个桶的容量为13l，壁厚为3mm。主要目标是确定最有效的桶形状和表面处理，以最大限度地提高冬季太阳能条件下的热效率。桶被评估为两种配置：黑色的底座和一半的外侧表面涂成黑色。实验测量太阳强度，水温，和传热参数使用热电偶和太阳能功率计。结果表明，锥型水桶的水温升高幅度最大，4 h后达到47.5℃，而倒锥型水桶和圆柱型水桶的水温分别为43.2℃和41.8℃。数值分析验证了实验结果，并提供了对流，蒸发和辐射传热的见解。研究结果强调了几何优化和表面修饰在太阳能热设计中的关键作用，为农村能源需求提供了一种具有成本效益和可持续的替代方案。

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 Science & Engineering Engineering-Safety, Risk, Reliability and Quality

CiteScore

6.80

自引率

7.90%

发文量

298

审稿时长

11 weeks

期刊介绍： Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.