Performance evaluation of nano-enhanced phase change materials for thermal energy storage: An experimental study

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-11-05 DOI:10.1016/j.csite.2024.105412

Mehmet Onur Karaağaç

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Abstract

In rapidly developing economies, the increasing energy demand and fossil fuel consumption have made the need for renewable energy sources and efficient thermal energy storage (TES) solutions more urgent than ever. This study focuses on enhancing the thermal energy storage capabilities of paraffin-based phase change materials (PCMs) by incorporating Al₂O₃, MgO, and CuO nanoparticles. The evaluation of nano-enhanced PCMs focused on their melting temperatures, thermal storage capacities, thermal conductivities, and charge/discharge times. The experimental results revealed significant changes in the thermal properties of the nano-enhanced PCMs compared to pure paraffin. The melting temperature was raised by 2 °C due to Al₂O₃ nanoparticles, whereas CuO and MgO nanoparticles decreased it by 1.7 °C and 1.8 °C, respectively. Compared to pure paraffin, Al₂O₃-PW, MgO-PW, and CuO-PW exhibited improvements of 13 %, 39 %, and 48 % in thermal conductivities, respectively. CuO-doped paraffin showed an 11.8 % decrease in discharge time, suggesting its suitability for rapid heat transfer applications like defrosting systems or thermal management in electronics. On the other hand, paraffin doped with MgO showed a minimal 2.24 % reduction in discharge time, indicating its effectiveness in applications requiring heat retention, particularly for improved thermal insulation in building materials. The results highlighted the potential of nano-enhanced PCMs in energy storage and construction is underlined, offering a sustainable approach to improving energy efficiency in various sectors.

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用于热能储存的纳米增强相变材料的性能评估：实验研究

在快速发展的经济体中，日益增长的能源需求和化石燃料消耗使得对可再生能源和高效热能储存（TES）解决方案的需求比以往任何时候都更加迫切。本研究的重点是通过加入 Al2O3、MgO 和 CuO 纳米粒子来增强石蜡基相变材料 (PCM) 的热能存储能力。对纳米增强型 PCM 的评估主要集中在其熔化温度、热存储容量、热传导率和充放电时间上。实验结果表明，与纯石蜡相比，纳米增强型 PCM 的热性能发生了显著变化。Al2O3 纳米粒子使熔化温度提高了 2 ℃，而 CuO 和 MgO 纳米粒子则使熔化温度分别降低了 1.7 ℃ 和 1.8 ℃。与纯石蜡相比，Al2O3-PW、MgO-PW 和 CuO-PW 的热导率分别提高了 13%、39% 和 48%。掺杂了氧化铜的石蜡的放电时间缩短了 11.8%，这表明它适用于快速热传导应用，如解冻系统或电子产品中的热管理。另一方面，掺杂氧化镁的石蜡的放电时间仅缩短了 2.24%，这表明它在需要保温的应用中非常有效，特别是在改进建筑材料的隔热性能方面。这些结果突显了纳米增强型 PCM 在能源储存和建筑方面的潜力，为提高各行业的能源效率提供了一种可持续的方法。

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

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.