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Experimental heat transfer coefficients between a surface and fixed and fluidized beds with PCM

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticoses
dc.contributor.authorIzquierdo-Barrientos, María Asunciónes
dc.contributor.authorSobrino, Celiaes
dc.contributor.authorAlmendros Ibáñez, José Antonioes
dc.date.accessioned2015-03-04T11:49:01Z
dc.date.available2015-03-04T11:49:01Z
dc.date.issued2015-03
dc.description.abstractThis work presents an experimental study to determine the capacity of a phase change material (PCM) in granular form to be used in fixed and bubbling fluidized beds for thermal energy storage. The experimental measurements are focused on determination of the heat transfer coefficient between a heated surface immersed in the bed and the granular PCM. The flow rate is varied to quantify its influence on the heat transfer coefficient. The PCM used is Rubitherm GR50 with a phase change temperature of approximately 50° C. The PCM is available in two different particle sizes, 0.54 mm and 1.64 mm, of which the finer is used in the fluidized bed and the coarser is used in the fixed bed. In addition, the results obtained for the PCM are compared with the heat transfer coefficients measured for sand, a material commonly used for thermal storage. In comparing the heat transfer coefficients for fixed and fluidized beds, the heat transfer coefficients in the fluidized bed with PCM are nearly three times higher than those for the fixed bed at the same gas flow rate. This increase in the heat transfer is a result of two main factors: first, the continuous renewal of PCM particles from the heated surface when they are fluidized, and second, the large quantities of energy in latent form absorbed by the PCM. In the fixed bed there is no renovation of particles, consequently only a small percentage of particles are able to change its phase. Hence, there is no increase in the heat transfer coefficient due to this fact.en
dc.description.sponsorshipThis work was partially funded by the Spanish Government (Project ENE2010-15403), theRegional Government of Castilla-La Mancha (Project PPIC10-0055-4054) and Castilla-La Mancha University (Project GE20101662).en
dc.description.statusPublicadoes
dc.format.extent33 p.
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationApplied Thermal Engineering (2015). 78, 373-379.en
dc.identifier.doi10.1016/j.applthermaleng.2014.12.044
dc.identifier.issn1359-4311
dc.identifier.publicationfirstpage373
dc.identifier.publicationlastpage379
dc.identifier.publicationtitleApplied thermal engineeringen
dc.identifier.publicationvolume78
dc.identifier.urihttps://hdl.handle.net/10016/20153
dc.identifier.uxxiAR/0000016171
dc.language.isoenges
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. ENE2010-15403es
dc.relation.projectIDCastilla-La Mancha. PPIC10-0055-4054es
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.applthermaleng.2014.12.044
dc.rights© 2014 Elsevier Ltd.en
dc.rights.accessRightsopen accessen
dc.subject.ecienciaFísicaes
dc.subject.ecienciaIngeniería Industriales
dc.subject.otherHeat transferen
dc.subject.otherFluidizationen
dc.subject.otherFixed beden
dc.subject.otherPhase change materialen
dc.titleExperimental heat transfer coefficients between a surface and fixed and fluidized beds with PCMen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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