Theoretical study on melting of phase change material by natural convection

Natural convection plays a crucial role in latent heat storage system. Determining how natural convection affects the melting of phase change material (PCM) will provide a better understanding of the melting process and give helpful advice on strengthening techniques. The research content of this pa...

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Autores principales:	Bingkun Huang, Shimi Yang, Enyi Hu, Xiuxiu Li, Jun Wang, Peter Lund
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Latent heat storage Melting mathematical model Natural convection PCM Coordination factor Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/db2ac5fc9f0a4091a8e7015896ea7b52
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spelling	oai:doaj.org-article:db2ac5fc9f0a4091a8e7015896ea7b522021-11-10T04:26:38ZTheoretical study on melting of phase change material by natural convection2214-157X10.1016/j.csite.2021.101620https://doaj.org/article/db2ac5fc9f0a4091a8e7015896ea7b522021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X21007838https://doaj.org/toc/2214-157XNatural convection plays a crucial role in latent heat storage system. Determining how natural convection affects the melting of phase change material (PCM) will provide a better understanding of the melting process and give helpful advice on strengthening techniques. The research content of this paper is a mathematical model is established to explain the melting process of PCM affected by natural convection. The mathematical model of phase change melting process is given by introducing the natural convection and the temperature gradient. A coordination factor (Co) based on the mathematical model, which is an instantaneous quantity and proportional to the heat exchange rate and the intensity of natural convection, is introduced to explain the melting process. A square-shaped and shell-tube (concentric, eccentric) PCM heat storage unit were numerically analyzed in more detail. It is found that the Co factor is closely related to the melting rate. It will not promote the melting rate when Co less than 0 while it will promote the melting rate when Co higher than 0, and the higher the Co value, the faster the melting rate. This model gives a clear and quantitative explanation for the problem of melting interface movement affected by natural convection, as well as that increasing the heating temperature and changing only the shape of the heat storage unit can greatly enhance the heat storage rate in this study. The model also provides theoretical guidance for the study of the phase change heat storage enhancement.Bingkun HuangShimi YangEnyi HuXiuxiu LiJun WangPeter LundElsevierarticleLatent heat storageMelting mathematical modelNatural convectionPCMCoordination factorEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101620- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Latent heat storage Melting mathematical model Natural convection PCM Coordination factor Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Latent heat storage Melting mathematical model Natural convection PCM Coordination factor Engineering (General). Civil engineering (General) TA1-2040 Bingkun Huang Shimi Yang Enyi Hu Xiuxiu Li Jun Wang Peter Lund Theoretical study on melting of phase change material by natural convection
description	Natural convection plays a crucial role in latent heat storage system. Determining how natural convection affects the melting of phase change material (PCM) will provide a better understanding of the melting process and give helpful advice on strengthening techniques. The research content of this paper is a mathematical model is established to explain the melting process of PCM affected by natural convection. The mathematical model of phase change melting process is given by introducing the natural convection and the temperature gradient. A coordination factor (Co) based on the mathematical model, which is an instantaneous quantity and proportional to the heat exchange rate and the intensity of natural convection, is introduced to explain the melting process. A square-shaped and shell-tube (concentric, eccentric) PCM heat storage unit were numerically analyzed in more detail. It is found that the Co factor is closely related to the melting rate. It will not promote the melting rate when Co less than 0 while it will promote the melting rate when Co higher than 0, and the higher the Co value, the faster the melting rate. This model gives a clear and quantitative explanation for the problem of melting interface movement affected by natural convection, as well as that increasing the heating temperature and changing only the shape of the heat storage unit can greatly enhance the heat storage rate in this study. The model also provides theoretical guidance for the study of the phase change heat storage enhancement.
format	article
author	Bingkun Huang Shimi Yang Enyi Hu Xiuxiu Li Jun Wang Peter Lund
author_facet	Bingkun Huang Shimi Yang Enyi Hu Xiuxiu Li Jun Wang Peter Lund
author_sort	Bingkun Huang
title	Theoretical study on melting of phase change material by natural convection
title_short	Theoretical study on melting of phase change material by natural convection
title_full	Theoretical study on melting of phase change material by natural convection
title_fullStr	Theoretical study on melting of phase change material by natural convection
title_full_unstemmed	Theoretical study on melting of phase change material by natural convection
title_sort	theoretical study on melting of phase change material by natural convection
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/db2ac5fc9f0a4091a8e7015896ea7b52
work_keys_str_mv	AT bingkunhuang theoreticalstudyonmeltingofphasechangematerialbynaturalconvection AT shimiyang theoreticalstudyonmeltingofphasechangematerialbynaturalconvection AT enyihu theoreticalstudyonmeltingofphasechangematerialbynaturalconvection AT xiuxiuli theoreticalstudyonmeltingofphasechangematerialbynaturalconvection AT junwang theoreticalstudyonmeltingofphasechangematerialbynaturalconvection AT peterlund theoreticalstudyonmeltingofphasechangematerialbynaturalconvection
_version_	1718440698530758656

Theoretical study on melting of phase change material by natural convection

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