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Effect of Biot and Stefan numbers of a phase change material submitted to cyclic Robin conditions on the heat flux discharge

dc.rights.licenseopenen_US
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorLE BOT, Cedric
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorANAS, Maftah
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorRYAD, Bouzouidja
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorALAIN, Sempey
dc.date.accessioned2024-10-31T09:49:02Z
dc.date.available2024-10-31T09:49:02Z
dc.date.issued2024-11-01
dc.identifier.issn1290-0729en_US
dc.identifier.urioai:crossref.org:10.1016/j.ijthermalsci.2024.109280
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203076
dc.description.abstractEnThis study focuses on the phase change behavior of a material subjected to an external heat transfer fluid. The work is based on a dimensionless study of heat flux involved during phase change, and a time-dependent boundary Robin condition is proposed to model the external heat transfer fluid. The charge/discharge cycles model relies on a time dependance of the external reference temperature, to represent successively the periods of phase change material melting (charge) and solidification (discharge). We chose an abrupt change in the external temperature to represent the action of an operator that switches between load and discharging periods. As the final shape of the tank will have an influence on the performances of charge and discharge, the simulations results, in terms of temperature, solid fraction and released heat flux, are presented for various Biot (Bi) and Stefan (Ste) numbers that give information on time and magnitude of charged and discharged energies. The study shows that an increase of Bi implies melting in a deeper thickness of PCM, higher values of temperature on the convective boundary condition and higher charged and discharged energies. An increase of Ste leads to higher temperatures on the convective boundary condition during charging periods, lower values during discharge and exhibits deeper melting during charge. Moreover, this energy varies during the cycles, and tends toward a constant value, this trend being fitted by a time function. The dimensionless study shows advantages concerning the material selection, but also drawbacks concerning the difficulty to highlight the specific temperatures (melting, external) when plotting the dimensionless form.
dc.language.isoENen_US
dc.sourcecrossref
dc.subject.enHeat storage
dc.subject.enLiquid–solid phase change
dc.subject.enBiot number
dc.subject.enStefan number
dc.title.enEffect of Biot and Stefan numbers of a phase change material submitted to cyclic Robin conditions on the heat flux discharge
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.ijthermalsci.2024.109280en_US
dc.subject.halSciences de l'ingénieur [physics]/Matériauxen_US
bordeaux.journalInternational Journal of Thermal Sciencesen_US
bordeaux.page109280en_US
bordeaux.volume205en_US
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionBordeaux INPen_US
bordeaux.institutionCNRSen_US
bordeaux.institutionINRAEen_US
bordeaux.institutionArts et Métiersen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04761622
hal.version1
hal.date.transferred2024-10-31T09:49:04Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International%20Journal%20of%20Thermal%20Sciences&rft.date=2024-11-01&rft.volume=205&rft.spage=109280&rft.epage=109280&rft.eissn=1290-0729&rft.issn=1290-0729&rft.au=LE%20BOT,%20Cedric&ANAS,%20Maftah&RYAD,%20Bouzouidja&ALAIN,%20Sempey&rft.genre=article


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