Simplified model of a dual-media molten-salt thermocline tank with a multiple layer wall

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Show simple item record Fernández Torrijos, María Sobrino Fernández, Celia Almendros Ibáñez, José Antonio 2020-12-02T17:02:23Z 2020-12-02T17:02:23Z 2017-07-15
dc.identifier.bibliographicCitation Fernández-Torrijos, M.; Sobrino, C.; Almendros-Ibáñez, J.A. (2017). Simplified model of a dual-media molten-salt thermocline tank with a multiple layer wall, Solar Energy, v. 151, pp. 146-161
dc.identifier.issn 0038-092X
dc.description.abstract Thermal ratcheting is a critical phenomenon associated with the cyclic operation of dual-media thermocline tanks in solar energy applications. To study this phenomenon, it is necessary to develop a comprehensive model of a thermocline tank that includes both the heterogeneous filler region and the composite tank wall. Because CFD models require a high computational cost to simulate a thermocline tank considering transient state operation, a simplified dual-phase model that includes the unsteady heat transfer through a multiple layer wall has been developed. The filler region consists of a rock bed with interstitial molten salt, and the tank wall is composed of a steel shell with two layers of insulation (firebrick and ceramic). In this simplified model, the fluid flow inside the tank is considered to be one-dimensional along the tank axis direction, whereas the heat conduction in the composite wall is considered to be two-dimensional. Therefore, a convective heat transfer coefficient from the bed to the wall is necessary to couple the molten salt flow with the heat transfer in the tank shell. In this work, the effects of both convective heat transfer from the bed to the wall and molten salt flow rate on the time-dependent thermal response of both the steel shell and molten salt have been analyzed. The simplified model is able to predict the temperatures of the molten salt, filler material and layer wall as well as the mechanical stress in the tank shell.
dc.description.sponsorship This work was partially funded by the Ministerio de Educación,Cultura y Deporte para la Formación de Profesorado Universitario(FPU-04941) and the Ministerio de Economía y Competitividad (Project ENE2014-54942-R) of the Spanish Government
dc.format.extent 58
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2017 Elsevier Ltd.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Thermal Energy Storage
dc.subject.other Molten-Salt Thermocline
dc.subject.other Thermal Ratcheting
dc.title Simplified model of a dual-media molten-salt thermocline tank with a multiple layer wall
dc.type research article
dc.subject.eciencia Ingeniería Industrial
dc.rights.accessRights open access
dc.relation.projectID Gobierno de España. ENE2014-54942-R
dc.relation.projectID Gobierno de España. FPU-04941
dc.identifier.publicationfirstpage 146
dc.identifier.publicationlastpage 161
dc.identifier.publicationtitle Solar Energy
dc.identifier.publicationvolume 151
dc.identifier.uxxi AR/0000020159
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder Ministerio de Educación, Cultura y Deporte (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Térmica y de Fluidos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticos
dc.type.hasVersion AM
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