A Numerical Study to Improve the Efficiency of Solar Collector used for water heating using Phase Change Material

Hazim A. Al-Zurfi, Muna Ali Talib, Qasim H. Hassan, Ghaith J. Aljabri
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Abstract

Solar water heaters are an effective technology for harnessing renewable solar energy to provide hot water for households and businesses. However, their efficiency can be impacted by factors like intermittent sunshine, heat losses, and low radiation intensity. The aim of this study is to increase the efficiency of solar water heaters through the use of phase change materials (PCMs). PCMs have the ability to store latent heat during phase change, releasing it later when needed. This study uses numerical simulations to analyze the effect of integrating different PCMs into a flat plate solar collector design. The findings could then be validated experimentally and applied to improve the real-world performance of solar water heating systems. The PCMs are placed inside the collector to absorb heat during the day and release it after sunset to continue heating the water. The research seeks to determine the optimal PCM properties, structure, and placement within the collector to maximize heat storage and transfer. The efficiency and performance of the solar collector system with different PCM configurations have been compared to those of a conventional collector without PCM. The outcomes uncover that the use of suitable PCMs can significantly improve the efficiency and heat output of the solar collector, especially during periods of low radiation and after sunset. The optimal PCM configuration maintains higher water temperatures for longer, allowing solar water heating to continue into the evening. The results may provide valuable insights for using PCMs to boost the efficiency of solar thermal technologies
利用相变材料提高太阳能集热器热水效率的数值研究
太阳能热水器是利用可再生太阳能为家庭和企业提供热水的有效技术。然而,间歇性日照、热损失和低辐射强度等因素会影响其效率。本研究的目的是通过使用相变材料(PCMs)来提高太阳能热水器的效率。相变材料能够在相变过程中储存潜热,并在需要时释放出来。本研究利用数值模拟来分析将不同的 PCM 集成到平板太阳能集热器设计中的效果。研究结果可以通过实验进行验证,并应用于改善太阳能热水系统的实际性能。PCM 被放置在集热器内,白天吸收热量,日落后释放热量,继续加热水。这项研究旨在确定集热器内最佳的 PCM 特性、结构和位置,以最大限度地储存和传递热量。采用不同 PCM 配置的太阳能集热器系统的效率和性能与不含 PCM 的传统集热器进行了比较。研究结果表明,使用合适的 PCM 可以显著提高太阳能集热器的效率和热量输出,尤其是在低辐射时段和日落后。最佳的 PCM 配置可以在较长时间内保持较高的水温,使太阳能热水器可以持续到傍晚。这些结果为利用 PCMs 提高太阳能热技术的效率提供了宝贵的启示。
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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CiteScore
6.20
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