Bouzennada Tarek, Mechighel Farid, Ghachem Kaouther, Kolsi Lioua
Mechanics of Materials & Plant Maintenance Research Laboratory, (LR3MI), Mechanical Engineering Deprtment, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba 23052, Algeria.
Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah Bint Abdulrahman University, Riyadh 84428, Saudi Arabia.
Nanomaterials (Basel). 2021 May 28;11(6):1425. doi: 10.3390/nano11061425.
A 2D-symmetric numerical study of a new design of Nano-Enhanced Phase change material (NEPCM)-filled enclosure is presented in this paper. The enclosure is equipped with an inner tube allowing the circulation of the heat transfer fluid (HTF); n-Octadecane is chosen as phase change material (PCM). Comsol-Multiphysics commercial code was used to solve the governing equations. This study has been performed to examine the heat distribution and melting rate under the influence of the inner-tube position and the concentration of the nanoparticles dispersed in the PCM. The inner tube was located at three different vertical positions and the nanoparticle concentration was varied from 0 to 0.06. The results revealed that both heat transfer/melting rates are improved when the inner tube is located at the bottom region of the enclosure and by increasing the concentration of the nanoparticles. The addition of the nanoparticles enhances the heat transfer due to the considerable increase in conductivity. On the other hand, by placing the tube in the bottom area of the enclosure, the liquid PCM gets a wider space, allowing the intensification of the natural convection.
本文介绍了一种新型纳米增强相变材料（NEPCM）填充外壳设计的二维对称数值研究。该外壳配备有一根内管，用于使传热流体（HTF）循环；选择正十八烷作为相变材料（PCM）。使用Comsol-Multiphysics商业代码求解控制方程。进行这项研究是为了考察内管位置和分散在PCM中的纳米颗粒浓度影响下的热分布和熔化速率。内管位于三个不同的垂直位置，纳米颗粒浓度在0到0.06之间变化。结果表明，当内管位于外壳底部区域并增加纳米颗粒浓度时，传热/熔化速率均会提高。纳米颗粒的添加由于电导率的显著增加而增强了传热。另一方面，通过将管子放置在外壳的底部区域，液态PCM获得了更宽的空间，从而使自然对流得以强化。
