Numerical Simulation of the Impact of the Heat Source Position on Melting of a Nano-Enhanced Phase Change Material

Nanomaterials

Lioua Kolsi¹  Kaouther Ghachem²  Farid Mechighel³  Tarek Bouzennada³ 

[1] College of Engineering, Mechanical Engineering Department, Ha’il University, Ha’il City 81481, Saudi Arabia;Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah Bint Abdulrahman University, Riyadh 84428, Saudi Arabia;Mechanics of Materials & Plant Maintenance Research Laboratory, (LR3MI), Mechanical Engineering Deprtment, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba 23052, Algeria;

关键词: NEPCM;    melting;    nanoparticles;    heat transfer;    phase change;    comsol-multiphysics;   

DOI  :  10.3390/nano11061425

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown