Channel formation and visualization of melting and crystallization behaviors in direct‐contact latent heat storage systems

dc.contributor.authorKunkel, Sven
dc.contributor.authorSchütz, Philipp
dc.contributor.authorWunder, Frederik
dc.contributor.authorKrimmel, Stefan
dc.contributor.authorWorlitschek, Jörg
dc.contributor.authorRepke, Jens‐Uwe
dc.contributor.authorRädle, Matthias
dc.date.accessioned2020-10-27T14:09:37Z
dc.date.available2020-10-27T14:09:37Z
dc.date.issued2020-02-12
dc.date.updated2020-10-26T20:30:53Z
dc.description.abstractThermal storage systems are an essential component for increasing the share of renewable energies in residential heating and for the valorization of waste heat. A key challenge for the widespread application of thermal storage systems is their limited power‐to‐capacity ratio. One potential solution for this challenge is represented by direct‐contact latent heat storage systems, in which a phase change material (PCM) is in direct contact with an immiscible heat transfer fluid (HTF). To demonstrate the applicability of the direct‐contact concept for domestic hot water production, a PCM with a phase change temperature of 59°C is chosen. To enable cost‐efficient implementation of the storage system, a eutectic mixture of two salt hydrates, magnesium chloride hexahydrate and magnesium nitrate hexahydrate, is chosen as the PCM. One key aspect for the direct‐contact concept is that, during discharge, the HTF channels in the PCM do not become clogged during the solidification of the PCM. In this study, the formation and topology of the channels in direct‐contact systems under an optimized flow condition are investigated via visual observation and X‐ray computed tomography. The elucidation of the channel structure provides information on the melting and crystallization behaviors of the PCM, which are shown schematically.en
dc.identifier.eissn1099-114X
dc.identifier.issn0363-907X
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/11785
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-10677
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.othercomputed tomographyen
dc.subject.otherdirect contact latent heat storageen
dc.subject.otherheat transfer surfaceen
dc.subject.otherlatent heat storageen
dc.subject.otherphase change materialen
dc.subject.otherthermal heat storageen
dc.titleChannel formation and visualization of melting and crystallization behaviors in direct‐contact latent heat storage systemsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1002/er.5202en
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleInternational Journal of Energy Researchen
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceChichester, UKen
dcterms.bibliographicCitation.pageend5025en
dcterms.bibliographicCitation.pagestart5017en
dcterms.bibliographicCitation.volume44en
tub.accessrights.dnbfreeen
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Prozess- und Verfahrenstechnik::FG Dynamik und Betrieb technischer Anlagende
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Dynamik und Betrieb technischer Anlagende
tub.affiliation.instituteInst. Prozess- und Verfahrenstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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