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研究方形单元中细胞倾斜对相变材料熔化的影响：数值研究。

Investigating the Impact of Cell Inclination on Phase Change Material Melting in Square Cells: A Numerical Study.

作者信息

Rashid Farhan Lafta, Khalaf Abbas Fadhil, Al-Obaidi Mudhar A, Dulaimi Anmar, Ameen Arman

机构信息

Petroleum Engineering Department, College of Engineering, University of Kerbala, Karbala 56001, Iraq.

Technical Institute of Baquba, Middle Technical University, Baquba 32001, Iraq.

出版信息

Materials (Basel). 2024 Jan 28;17(3):633. doi: 10.3390/ma17030633.

DOI:10.3390/ma17030633
PMID:38592004
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10856545/
Abstract

In order to determine the ideal degree of inclination that should be employed for constructing effective thermal energy storage systems, it is important to examine the impact of inclination angle on the melting behavior of phase change materials (PCMs) such as paraffin wax within a square cell. In consequence, this would guarantee the greatest capacity for energy release and storage. Additionally, analyzing this influence aids engineers in creating systems that enhance heat flow from external sources to the PCM and vice versa. To find out how the cell's inclination angle affects the melting of PCM of paraffin wax (RT42) inside a square cell, a numerical analysis is carried out using the ANSYS/FLUENT 16 software. Specifically, the temperature and velocity distributions, together with the evolution of the melting process, will be shown for various inclination angles, and a thorough comparison will be made to assess the influence of inclination angle on the PCM melting process and its completion. The findings demonstrated that when the cell's inclination angle increased from 0° to 15° and from 0° to 30° and 45°, respectively, the amount of time required to finish the melting process increased by 15%, 42%, and 71%, respectively. Additionally, after 210 min of operation, the PCM's maximum temperature is 351.5 K with a 0° angle of inclination (horizontal) against 332.5 K with an angle of inclination of 45°.

摘要

为了确定构建有效的热能存储系统时应采用的理想倾斜度，研究倾斜角度对方形单元内相变材料（PCM）（如石蜡）熔化行为的影响非常重要。这样做能够确保最大的能量释放和存储能力。此外，分析这种影响有助于工程师设计出能增强外部热源与PCM之间热流的系统。为了探究方形单元的倾斜角度如何影响单元内石蜡（RT42）相变材料的熔化过程，使用ANSYS/FLUENT 16软件进行了数值分析。具体而言，将展示不同倾斜角度下的温度和速度分布以及熔化过程的演变，并进行全面比较以评估倾斜角度对PCM熔化过程及其完成情况的影响。研究结果表明，当单元的倾斜角度分别从0°增加到15°、从0°增加到30°和45°时，完成熔化过程所需的时间分别增加了15%、42%和71%。此外，运行210分钟后，倾斜角度为0°（水平）时PCM的最高温度为351.5 K，而倾斜角度为45°时为332.5 K。

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