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Numerical study on n-octadecane PCM melting process inside a pear-shaped finned container
Case Studies in Thermal Engineering ( IF 6.8 ) Pub Date : 2022-07-31 , DOI: 10.1016/j.csite.2022.102328
Abed Mourad , Naef A.A. Qasem , Aissa Abderrahmane , Riadh Marzouki , Kamel Guedri , Obai Younis , Nehad Ali Shah , Thongchai Botmart

This work numerically explores the melting process of a nano-enhanced phase change material (NePCM) in thermal energy storage (TES) system. The TES unit is pear-shaped and filled with n-octadecane PCM loaded with Al2O3 nanoparticles and fitted with copper fins. The heat transport governing equations are solved using the finite element method's enthalpy-porosity approach. The melting and heat transmission processes were investigated in terms of the impacts of a variety of factors, including the volume percentage of nanoparticles, the passage of time, the number and the dimensions of the fins. The findings show that the addition of nanoparticles improves the melting process of PCM. For example, adding 6% Al2O3 into PCM decreases the melting time by 12.5%. Furthermore, longer and thinner fins are advised to increase melting rate due to decreased thermal resistance enhanced heat propagation in the deeper regions of the thermal storage unit.



中文翻译:

梨形翅片容器内正十八烷PCM熔化过程的数值研究

这项工作以数值方式探索了热能存储 (TES) 系统中纳米增强相变材料 (NePCM) 的熔化过程。TES 单元呈梨形,填充有正十八烷 PCM,负载有 Al 2 O 3纳米颗粒,并配有铜翅片。使用有限元方法的焓-孔隙率方法求解热传输控制方程。根据多种因素的影响,研究了熔化和传热过程,包括纳米颗粒的体积百分比、时间的流逝、翅片的数量和尺寸。研究结果表明,纳米粒子的添加改善了 PCM 的熔化过程。例如,添加 6% Al 2 O 3加入 PCM 可减少 12.5% 的熔化时间。此外,建议更长和更薄的翅片增加熔化速率,因为热阻降低会增强热存储单元较深区域的热传播。

更新日期:2022-07-31
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