Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation

Heating decarbonisation through electrification requires the development of novel heat batteries. They should be suitable for the specific application and match the operation conditions of domestic renewable energy sources. Supercooled liquids, often considered a drawback of phase change materials,...

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Autores: Lizana, Jesús, Sánchez-Jiménez, Pedro E., Chacartegui, Ricardo, Becerra, José A., Pérez-Maqueda, Luis A.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2022
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/365250
Acesso em linha:http://hdl.handle.net/10261/365250
Access Level:Acceso aberto
Palavra-chave:Thermal energy storage
Phase change material
Sodium acetate
Supercooled liquid
Stable supercooling
Heat battery
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spelling Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisationLizana, JesúsSánchez-Jiménez, Pedro E.Chacartegui, RicardoBecerra, José A.Pérez-Maqueda, Luis A.Thermal energy storagePhase change materialSodium acetateSupercooled liquidStable supercoolingHeat batteryHeating decarbonisation through electrification requires the development of novel heat batteries. They should be suitable for the specific application and match the operation conditions of domestic renewable energy sources. Supercooled liquids, often considered a drawback of phase change materials, are among the most promising technologies supporting heating decarbonisation. Although some studies have shed light on stable supercooling, the fundamentals and stability remain open problems not always accompanied by relevant experimental investigations. This research critically analyses the physic and chemistry of sodium acetate (SA, NaCHCOO) aqueous solution, a low-cost, non-toxic, and abundant compound with stable supercooling for long-term heat storage. It has an appropriate phase change temperature for high-density heat storage using heat pumps or solar thermal technologies in residential applications. The existing discrepancies in literature are critically discussed through a systematic experimental evaluation, providing novel insights into efficient material design and appropriate boundary conditions for reliable material use in long-term heat batteries. Despite previous studies showing that the thermal reliability and stability of sodium acetate aqueous solution as a supercooled liquid for heat storage cannot be guaranteed, this study demonstrates that through an appropriate encapsulation and sealing method, the peritectic composition of sodium acetate solution (p-SA 58 wt%) can be used as a supercooled liquid for long-term heat storage with a stable melting temperature of 57 °C, appropriate for domestic heat technologies. It is demonstrated that energy storage efficiency can be maintained under cycling, with a constant latent heat storage capacity of 245 kJ/kg and a volumetric storage density of 314 MJ/m. It was confirmed that the material should achieve a fully-melted state for stable supercooling. Finally, local cooling and retaining seed crystals through high pressure were highlighted as the most suitable basic principles for successful crystallization and heat release. This promising material can store energy for long periods without latent heat losses due to its stable subcooling. Latent heat can be released when required at any selected time and temperature just by a simple activation process.ElsevierMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420222024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/365250reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICIN/FJC2019-039480-I/http://dx.doi.org/10.1016/j.est.2022.105584Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3652502026-05-22T06:33:51Z
dc.title.none.fl_str_mv Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
title Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
spellingShingle Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
Lizana, Jesús
Thermal energy storage
Phase change material
Sodium acetate
Supercooled liquid
Stable supercooling
Heat battery
title_short Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
title_full Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
title_fullStr Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
title_full_unstemmed Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
title_sort Supercooled sodium acetate aqueous solution for long-term heat storage to support heating decarbonisation
dc.creator.none.fl_str_mv Lizana, Jesús
Sánchez-Jiménez, Pedro E.
Chacartegui, Ricardo
Becerra, José A.
Pérez-Maqueda, Luis A.
author Lizana, Jesús
author_facet Lizana, Jesús
Sánchez-Jiménez, Pedro E.
Chacartegui, Ricardo
Becerra, José A.
Pérez-Maqueda, Luis A.
author_role author
author2 Sánchez-Jiménez, Pedro E.
Chacartegui, Ricardo
Becerra, José A.
Pérez-Maqueda, Luis A.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Thermal energy storage
Phase change material
Sodium acetate
Supercooled liquid
Stable supercooling
Heat battery
topic Thermal energy storage
Phase change material
Sodium acetate
Supercooled liquid
Stable supercooling
Heat battery
description Heating decarbonisation through electrification requires the development of novel heat batteries. They should be suitable for the specific application and match the operation conditions of domestic renewable energy sources. Supercooled liquids, often considered a drawback of phase change materials, are among the most promising technologies supporting heating decarbonisation. Although some studies have shed light on stable supercooling, the fundamentals and stability remain open problems not always accompanied by relevant experimental investigations. This research critically analyses the physic and chemistry of sodium acetate (SA, NaCHCOO) aqueous solution, a low-cost, non-toxic, and abundant compound with stable supercooling for long-term heat storage. It has an appropriate phase change temperature for high-density heat storage using heat pumps or solar thermal technologies in residential applications. The existing discrepancies in literature are critically discussed through a systematic experimental evaluation, providing novel insights into efficient material design and appropriate boundary conditions for reliable material use in long-term heat batteries. Despite previous studies showing that the thermal reliability and stability of sodium acetate aqueous solution as a supercooled liquid for heat storage cannot be guaranteed, this study demonstrates that through an appropriate encapsulation and sealing method, the peritectic composition of sodium acetate solution (p-SA 58 wt%) can be used as a supercooled liquid for long-term heat storage with a stable melting temperature of 57 °C, appropriate for domestic heat technologies. It is demonstrated that energy storage efficiency can be maintained under cycling, with a constant latent heat storage capacity of 245 kJ/kg and a volumetric storage density of 314 MJ/m. It was confirmed that the material should achieve a fully-melted state for stable supercooling. Finally, local cooling and retaining seed crystals through high pressure were highlighted as the most suitable basic principles for successful crystallization and heat release. This promising material can store energy for long periods without latent heat losses due to its stable subcooling. Latent heat can be released when required at any selected time and temperature just by a simple activation process.
publishDate 2022
dc.date.none.fl_str_mv 2022
2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/365250
url http://hdl.handle.net/10261/365250
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICIN/FJC2019-039480-I/
http://dx.doi.org/10.1016/j.est.2022.105584
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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