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Mathematical modelling of a latent heat storage: Influence of PCM thermal conductivity and enthalpy-temperature relationship

dc.date.accessioned2024-06-14T11:15:17Z
dc.date.available2024-06-14T11:15:17Z
dc.date.issued2024-06-08
dc.identifierdoi:10.17170/kobra-2024061110329
dc.identifier.urihttp://hdl.handle.net/123456789/15848
dc.description.sponsorshipGefördert im Rahmen eines Open-Access-Transformationsvertrags mit dem Verlagger
dc.language.isoeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectlatent heat storageeng
dc.subjectphase change materialseng
dc.subjectmodellingeng
dc.subjectthermal propertieseng
dc.subject.ddc333
dc.subject.ddc600
dc.titleMathematical modelling of a latent heat storage: Influence of PCM thermal conductivity and enthalpy-temperature relationshipeng
dc.typeAufsatz
dcterms.abstractMathematical modelling of latent heat storage units is useful to calculate their thermal performance for integration in larger systems. This requires the input of thermophysical properties of the phase change material (PCM) used, but data provided by manufacturers or published in the literature is often incomplete and/or varies between sources. However, it is not clear to what extent an accurate knowledge of these properties, including their phase dependency, is necessary to obtain reliable calculations, especially when air is the heat transfer fluid. This study presents a numerical model for a latent heat storage unit containing PCM in rectangular slabs. The model was validated against own measurements and then employed to assess the effect of the assumed thermal conductivity values and the enthalpy curve shape on calculation accuracy depending on factors such as slab thickness and length, air velocity, PCM type and inlet air temperature. Results show that for thin slabs and/or low air velocity, accurate calculations can be obtained with a constant thermal conductivity within the solid-liquid range, irrespective of the operating conditions and material properties tested. As slab thickness and air velocity increase, conductivity gradually becomes more important. For non-isothermal phase change, the assumption of a linear enthalpy curve is sufficient to obtain accurate performance calculations under the conditions tested.eng
dcterms.accessRightsopen access
dcterms.creatorRomán, Franz
dcterms.creatorMunir, Zeeshan
dcterms.creatorHensel, Oliver
dc.relation.doidoi:10.1016/j.est.2024.112424
dc.relation.projectidProject number 450248664
dc.subject.swdLatentwärmespeicherger
dc.subject.swdMathematisches Modellger
dc.subject.swdThermodynamische Eigenschaftger
dc.subject.swdPhasenübergangswerkstoffger
dc.subject.swdWärmeleitfähigkeitger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:2352-1538
dcterms.source.journalJournal of Energy Storageeng
dcterms.source.volumeVolume 94
kup.iskupfalse
dcterms.source.articlenumber112424


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Namensnennung 4.0 International
Except where otherwise noted, this item's license is described as Namensnennung 4.0 International