Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks

Solar cooling is a promising solution to overcome the high energy demand of buildings. Nevertheless, the time dependent nature of the solar source leads to the need of storage systems in order to better match the energy demand and supply. For this purpose, thermal energy storage was considered durin...

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Autores: Gil, Antoni, Peiró Bell-lloch, Gerard, Oró Prim, Eduard, Cabeza, Luisa F.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/64630
Acesso em linha:https://doi.org/10.1016/j.applthermaleng.2018.07.029
http://hdl.handle.net/10459.1/64630
Access Level:acceso abierto
Palavra-chave:Effective thermal conductivity
Phase change material
Solar cooling
Storage tank with fins
Thermal energy storage
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spelling Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanksGil, AntoniPeiró Bell-lloch, GerardOró Prim, EduardCabeza, Luisa F.Effective thermal conductivityPhase change materialSolar coolingStorage tank with finsThermal energy storageSolar cooling is a promising solution to overcome the high energy demand of buildings. Nevertheless, the time dependent nature of the solar source leads to the need of storage systems in order to better match the energy demand and supply. For this purpose, thermal energy storage was considered during last decades as the optimal solution at commercial scale. Latent thermal energy storage offers higher energy densities together with more constant outlet temperature than sensible heat storage, but the low thermal conductivities of PCMs represents the main drawback which limits its applicability. Several studies based on heat transfer enhancement techniques applied in latent thermal energy storage have already been performed. Specifically, the technique of adding fins in storage tanks, which is the most known and studied. However, there are few experimental studies at pilot plant scale focused on this technique and less on the analysis of the heat transfer enhancement through the parameter effective thermal conductivity. This paper presents an experimental study where this parameter is determined and compared using of two identical latent storage tanks, one with 196 transversal squared fins and another one without fins. In this case, hydroquinone was selected as PCM. A set of six experiments was performed at pilot plant of the University of Lleida (Spain), combining three different HTF flow rates and two temperature gradients between HTF inlet temperature and initial PCM temperature. Experimental results showed that the addition of fins can increase the effective thermal conductivity between 4.11% and 25.83% comparing the experiment with highest and lowest thermal power supplied to the PCM, respectively.The work was partially funded by the Spanish government (ULLE10-4E-1305 and ENE2015-64117-C5-1-R (MINECO/FEDER)). The authors would like to thank the Catalan Government for the quality accreditation given to their research group GREA (2017 SGR 1537). GREA is certified agent TECNIO in the category of technology developers from the Government of Catalonia.Elsevier2018202020182018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1016/j.applthermaleng.2018.07.029http://hdl.handle.net/10459.1/64630http://hdl.handle.net/10459.1/64630reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/MINECO//ENE2015-64117-C5-1-RVersió postprint del document publicat a: https://doi.org/10.1016/j.applthermaleng.2018.07.029Applied Thermal Engineering, 2018, vol. 142, p. 736-744cc-by-nc-nd (c) Elsevier, 2018info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/esoai:recercat.cat:10459.1/646302026-05-29T05:05:01Z
dc.title.none.fl_str_mv Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
title Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
spellingShingle Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
Gil, Antoni
Effective thermal conductivity
Phase change material
Solar cooling
Storage tank with fins
Thermal energy storage
title_short Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
title_full Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
title_fullStr Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
title_full_unstemmed Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
title_sort Experimental analysis of the effective thermal conductivity enhancement of PCM using finned tubes in high temperature bulk tanks
dc.creator.none.fl_str_mv Gil, Antoni
Peiró Bell-lloch, Gerard
Oró Prim, Eduard
Cabeza, Luisa F.
author Gil, Antoni
author_facet Gil, Antoni
Peiró Bell-lloch, Gerard
Oró Prim, Eduard
Cabeza, Luisa F.
author_role author
author2 Peiró Bell-lloch, Gerard
Oró Prim, Eduard
Cabeza, Luisa F.
author2_role author
author
author
dc.subject.none.fl_str_mv Effective thermal conductivity
Phase change material
Solar cooling
Storage tank with fins
Thermal energy storage
topic Effective thermal conductivity
Phase change material
Solar cooling
Storage tank with fins
Thermal energy storage
description Solar cooling is a promising solution to overcome the high energy demand of buildings. Nevertheless, the time dependent nature of the solar source leads to the need of storage systems in order to better match the energy demand and supply. For this purpose, thermal energy storage was considered during last decades as the optimal solution at commercial scale. Latent thermal energy storage offers higher energy densities together with more constant outlet temperature than sensible heat storage, but the low thermal conductivities of PCMs represents the main drawback which limits its applicability. Several studies based on heat transfer enhancement techniques applied in latent thermal energy storage have already been performed. Specifically, the technique of adding fins in storage tanks, which is the most known and studied. However, there are few experimental studies at pilot plant scale focused on this technique and less on the analysis of the heat transfer enhancement through the parameter effective thermal conductivity. This paper presents an experimental study where this parameter is determined and compared using of two identical latent storage tanks, one with 196 transversal squared fins and another one without fins. In this case, hydroquinone was selected as PCM. A set of six experiments was performed at pilot plant of the University of Lleida (Spain), combining three different HTF flow rates and two temperature gradients between HTF inlet temperature and initial PCM temperature. Experimental results showed that the addition of fins can increase the effective thermal conductivity between 4.11% and 25.83% comparing the experiment with highest and lowest thermal power supplied to the PCM, respectively.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
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.applthermaleng.2018.07.029
http://hdl.handle.net/10459.1/64630
http://hdl.handle.net/10459.1/64630
url https://doi.org/10.1016/j.applthermaleng.2018.07.029
http://hdl.handle.net/10459.1/64630
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//ENE2015-64117-C5-1-R
Versió postprint del document publicat a: https://doi.org/10.1016/j.applthermaleng.2018.07.029
Applied Thermal Engineering, 2018, vol. 142, p. 736-744
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier, 2018
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/es
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier, 2018
http://creativecommons.org/licenses/by-nc-nd/4.0/es
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:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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