Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system

In the present work, a 2D Cartesian numerical model is implemented to simulate the transient behaviour of a latent heat thermal energy storage system under the effect of the dynamic melting enhancement technique. This enhancement technique consists of recirculating the liquid phase change material (...

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Autores: Gasia, Jaume, Groulx, Dominic, Tay, N. H. Steven, Cabeza, Luisa F.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/69361
Acceso en línea:https://doi.org/10.1016/j.est.2020.101664
http://hdl.handle.net/10459.1/69361
Access Level:acceso abierto
Palabra clave:Thermal energy storage
Phase change material
Heat transfer enhancement
Dynamic melting
Numerical study
Forced convection
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spelling Numerical study of dynamic melting enhancement in a latent heat thermal energy storage systemGasia, JaumeGroulx, DominicTay, N. H. StevenCabeza, Luisa F.Thermal energy storagePhase change materialHeat transfer enhancementDynamic meltingNumerical studyForced convectionIn the present work, a 2D Cartesian numerical model is implemented to simulate the transient behaviour of a latent heat thermal energy storage system under the effect of the dynamic melting enhancement technique. This enhancement technique consists of recirculating the liquid phase change material (PCM) during the melting process with an external pump and therefore increasing the overall heat transfer coefficient. Several simulations were carried out to study the influence of the PCM flow direction, the PCM velocity, and the heat gains in the PCM recirculation loop, showing in all cases the benefits of implementing this enhancement technique. Results from the simulations show that when the PCM flows from top to bottom, higher enhancements are obtained when compared to the PCM flowing from bottom to top. Moreover, it is observed that the higher the PCM velocity, the better the enhancement in terms of process duration and heat transfer rates. Additionally, the PCM velocity also has an influence over the evolution of the PCM melting front and thus over the evolution of the PCM temperature profiles. It is shown that the intensity of the enhancements, as well as the evolution of the melting front and temperature profiles, are more influenced by the PCM velocity than by the ratio between the heat transfer fluid (HTF) and PCM velocities. Finally, heat gains should be avoided in the PCM recirculation loop since they decrease the heat transfer rate between the PCM and the HTF.This work was partially funded by the Ministerio de Ciencia, Innovación y Universidades de España (RTI2018-093849-B-C31 - MCIU/AEI/FEDER, UE). The authors would like to thank the Catalan Government for the quality accreditation given to their research group (2017 SGR 1537). GREiA is certified agent TECNIO in the category of technology developers from the Government of Catalonia. This work is partially supported by ICREA under the ICREA Academia programme. Jaume Gasia would like to thank the Departament d'Universitats, Recerca i Societat de la Informació de la Generalitat de Catalunya for his research fellowship (2017 FI_B1 00092) and the Societat Econòmica Barcelonesa d'Amics del País (SEBAP) for his research mobility scholarship. The Dalhousie Researchers would like to thank the Canadian Foundation for Innovation (CFI) for their financial assistance towards the infrastructure used in this project.Elsevier2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1016/j.est.2020.101664http://hdl.handle.net/10459.1/69361reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésMINECO/PN2013-2016/RTI2018-093849-B-C31Versió postprint del document publicat a https://doi.org/10.1016/j.est.2020.101664Journal of Energy Storage, 2020, vol. 31, p. 101664-1-101664-15cc-by-nc-nd (c) Elsevier, 2020info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:repositori.udl.cat:10459.1/693612026-06-24T12:42:17Z
dc.title.none.fl_str_mv Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
title Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
spellingShingle Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
Gasia, Jaume
Thermal energy storage
Phase change material
Heat transfer enhancement
Dynamic melting
Numerical study
Forced convection
title_short Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
title_full Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
title_fullStr Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
title_full_unstemmed Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
title_sort Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system
dc.creator.none.fl_str_mv Gasia, Jaume
Groulx, Dominic
Tay, N. H. Steven
Cabeza, Luisa F.
author Gasia, Jaume
author_facet Gasia, Jaume
Groulx, Dominic
Tay, N. H. Steven
Cabeza, Luisa F.
author_role author
author2 Groulx, Dominic
Tay, N. H. Steven
Cabeza, Luisa F.
author2_role author
author
author
dc.subject.none.fl_str_mv Thermal energy storage
Phase change material
Heat transfer enhancement
Dynamic melting
Numerical study
Forced convection
topic Thermal energy storage
Phase change material
Heat transfer enhancement
Dynamic melting
Numerical study
Forced convection
description In the present work, a 2D Cartesian numerical model is implemented to simulate the transient behaviour of a latent heat thermal energy storage system under the effect of the dynamic melting enhancement technique. This enhancement technique consists of recirculating the liquid phase change material (PCM) during the melting process with an external pump and therefore increasing the overall heat transfer coefficient. Several simulations were carried out to study the influence of the PCM flow direction, the PCM velocity, and the heat gains in the PCM recirculation loop, showing in all cases the benefits of implementing this enhancement technique. Results from the simulations show that when the PCM flows from top to bottom, higher enhancements are obtained when compared to the PCM flowing from bottom to top. Moreover, it is observed that the higher the PCM velocity, the better the enhancement in terms of process duration and heat transfer rates. Additionally, the PCM velocity also has an influence over the evolution of the PCM melting front and thus over the evolution of the PCM temperature profiles. It is shown that the intensity of the enhancements, as well as the evolution of the melting front and temperature profiles, are more influenced by the PCM velocity than by the ratio between the heat transfer fluid (HTF) and PCM velocities. Finally, heat gains should be avoided in the PCM recirculation loop since they decrease the heat transfer rate between the PCM and the HTF.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.est.2020.101664
http://hdl.handle.net/10459.1/69361
url https://doi.org/10.1016/j.est.2020.101664
http://hdl.handle.net/10459.1/69361
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv MINECO/PN2013-2016/RTI2018-093849-B-C31
Versió postprint del document publicat a https://doi.org/10.1016/j.est.2020.101664
Journal of Energy Storage, 2020, vol. 31, p. 101664-1-101664-15
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier, 2020
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier, 2020
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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