Receiving heat from a PCM tank by using natural convection of water and NEPCM: A simulation for LHTES application

Case Studies in Thermal Engineering

A.M. Algelany¹  Mohamed Ehab¹  Phuoc Quy Phong Nguyen²  Hamdi Ayed³  Khaled A. Gepreel⁴  Mahidzal Dahari⁵  Makatar Wae-hayee⁶  Van Nhanh Nguyen⁷  Yan Cao⁸ 

[1] Corresponding authors.;Department of Mathematics, Faculty of Sciences, Fayoum University, Fayoum, 63514, Egypt;Department of Civil Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia;Department of Electrical Engineering, Faculty of Engineering, University Malaya, 50603, Kuala Lumpur, Malaysia;Department of Mathematics, College of Science and Humanities in ALKharj, Prince Sattam Bin Abdulaziz University, AL-Karj, 11942, Saudi Arabia;Department of Mathematics, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia;PATET Research Group, Ho Chi Minh City University of Transport, Ho Chi Minh City, Viet Nam;School of Computer Science and Engineering, Xi’an Technological University, Xi’an, 710021, China;

关键词: Latent heat thermal energy storage;    Phase change material;    Natural convection;    Nano-encapsulated phase change material;    Porous medium;   

DOI  :  

来源: DOAJ

【 摘 要 】

Latent heat thermal energy storage (LHTES) systems are widely used due to their ability to store a lot of heat energy as latent, and few studies have directly or indirectly investigated on the heat exchange methods with LHTES systems. In the present study, the free convection of a mixture of water and Nano-encapsulated phase change material (NEPCM) with a porous medium was used to exchange heat energy between a cold-water stream and a hot tank filled phase change material (PCM). NEPCM are nanostructures consisted of a solid shell and a PCM core, and the addition of these nanostructures to water has remarkable effects on the heat transfer parameters. In this research, a number of cases were simulated using computational fluid dynamic (CFD) to observe the impacts of injecting NEPCM to water, the porosity of the porous media and the location of the phase change zone on the average heat flux of the PCM tank. The results showed that increment of porosity number from 0.85 to 0.95 decreased the average heat flux of the PCM tank by 13.8%. Moreover, adding 3% NEPCM to water enhanced the average heat flux of the PCM tank by 22.2% and 18.4% when porosity numbers were 0.85 and 0.95, respectively.

【 授权许可】

Unknown