Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement

The solidification process in a multi-tube latent heat energy system is affected by the natural convection and the arrangement of heat exchanger tubes, which changes the buoyancy effect as well. In the current work, the effect of the arrangement of the tubes in a multi-tube heat exchanger was examin...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mohammadreza Ebrahimnataj Tiji, Jasim M. Mahdi, Hayder I. Mohammed, Hasan Sh. Majdi, Abbas Ebrahimi, Rohollah Babaei Mahani, Pouyan Talebizadehsardari, Wahiba Yaïci
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	natural convection phase change material tubes’ arrangement thermal energy storage solidification multi-tubes heat exchanger Technology T
Acceso en línea:	https://doaj.org/article/3aad6d3260644ae9bd1a9bad8038c743
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3aad6d3260644ae9bd1a9bad8038c743
record_format	dspace
spelling	oai:doaj.org-article:3aad6d3260644ae9bd1a9bad8038c7432021-11-25T17:25:58ZNatural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement10.3390/en142274891996-1073https://doaj.org/article/3aad6d3260644ae9bd1a9bad8038c7432021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7489https://doaj.org/toc/1996-1073The solidification process in a multi-tube latent heat energy system is affected by the natural convection and the arrangement of heat exchanger tubes, which changes the buoyancy effect as well. In the current work, the effect of the arrangement of the tubes in a multi-tube heat exchanger was examined during the solidification process with the focus on the natural convection effects inside the phase change material (PCM). The behavior of the system was numerically analyzed using liquid fraction and energy released, as well as temperature, velocity and streamline profiles for different studied cases. The arrangement of the tubes, considering seven pipes in the symmetrical condition, are assumed at different positions in the system, including uniform distribution of the tubes as well as non-uniform distribution, i.e., tubes concentrated at the bottom, middle and the top of the PCM shell. The model was first validated compared with previous experimental work from the literature. The results show that the heat rate removal from the PCM after 16 h was 52.89 W (max) and 14.85 W (min) for the cases of uniform tube distribution and tubes concentrated at the bottom, respectively, for the proposed dimensions of the heat exchanger. The heat rate removal of the system with uniform tube distribution increases when the distance between the tubes and top of the shell reduces, and increased equal to 68.75 W due to natural convection effect. The heat release rate also reduces by increasing the temperature the tubes. The heat removal rate increases by 7.5%, and 23.7% when the temperature increases from 10 °C to 15 °C and 20 °C, respectively. This paper reveals that specific consideration to the arrangement of the tubes should be made to enhance the heat recovery process attending natural convection effects in phase change heat storage systems.Mohammadreza Ebrahimnataj TijiJasim M. MahdiHayder I. MohammedHasan Sh. MajdiAbbas EbrahimiRohollah Babaei MahaniPouyan TalebizadehsardariWahiba YaïciMDPI AGarticlenatural convectionphase change materialtubes’ arrangementthermal energy storagesolidificationmulti-tubes heat exchangerTechnologyTENEnergies, Vol 14, Iss 7489, p 7489 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	natural convection phase change material tubes’ arrangement thermal energy storage solidification multi-tubes heat exchanger Technology T
spellingShingle	natural convection phase change material tubes’ arrangement thermal energy storage solidification multi-tubes heat exchanger Technology T Mohammadreza Ebrahimnataj Tiji Jasim M. Mahdi Hayder I. Mohammed Hasan Sh. Majdi Abbas Ebrahimi Rohollah Babaei Mahani Pouyan Talebizadehsardari Wahiba Yaïci Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
description	The solidification process in a multi-tube latent heat energy system is affected by the natural convection and the arrangement of heat exchanger tubes, which changes the buoyancy effect as well. In the current work, the effect of the arrangement of the tubes in a multi-tube heat exchanger was examined during the solidification process with the focus on the natural convection effects inside the phase change material (PCM). The behavior of the system was numerically analyzed using liquid fraction and energy released, as well as temperature, velocity and streamline profiles for different studied cases. The arrangement of the tubes, considering seven pipes in the symmetrical condition, are assumed at different positions in the system, including uniform distribution of the tubes as well as non-uniform distribution, i.e., tubes concentrated at the bottom, middle and the top of the PCM shell. The model was first validated compared with previous experimental work from the literature. The results show that the heat rate removal from the PCM after 16 h was 52.89 W (max) and 14.85 W (min) for the cases of uniform tube distribution and tubes concentrated at the bottom, respectively, for the proposed dimensions of the heat exchanger. The heat rate removal of the system with uniform tube distribution increases when the distance between the tubes and top of the shell reduces, and increased equal to 68.75 W due to natural convection effect. The heat release rate also reduces by increasing the temperature the tubes. The heat removal rate increases by 7.5%, and 23.7% when the temperature increases from 10 °C to 15 °C and 20 °C, respectively. This paper reveals that specific consideration to the arrangement of the tubes should be made to enhance the heat recovery process attending natural convection effects in phase change heat storage systems.
format	article
author	Mohammadreza Ebrahimnataj Tiji Jasim M. Mahdi Hayder I. Mohammed Hasan Sh. Majdi Abbas Ebrahimi Rohollah Babaei Mahani Pouyan Talebizadehsardari Wahiba Yaïci
author_facet	Mohammadreza Ebrahimnataj Tiji Jasim M. Mahdi Hayder I. Mohammed Hasan Sh. Majdi Abbas Ebrahimi Rohollah Babaei Mahani Pouyan Talebizadehsardari Wahiba Yaïci
author_sort	Mohammadreza Ebrahimnataj Tiji
title	Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
title_short	Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
title_full	Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
title_fullStr	Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
title_full_unstemmed	Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement
title_sort	natural convection effect on solidification enhancement in a multi-tube latent heat storage system: effect of tubes’ arrangement
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3aad6d3260644ae9bd1a9bad8038c743
work_keys_str_mv	AT mohammadrezaebrahimnatajtiji naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT jasimmmahdi naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT hayderimohammed naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT hasanshmajdi naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT abbasebrahimi naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT rohollahbabaeimahani naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT pouyantalebizadehsardari naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement AT wahibayaici naturalconvectioneffectonsolidificationenhancementinamultitubelatentheatstoragesystemeffectoftubesarrangement
_version_	1718412344817614848

Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement

Ejemplares similares