Exergy recovery from solar heated particles to supercritical CO2

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dc.contributor.author Hernández Jiménez, Fernando
dc.contributor.author Soria Verdugo, Antonio
dc.contributor.author Acosta Iborra, Antonio
dc.contributor.author Santana Santana, Domingo José
dc.date.accessioned 2021-04-29T08:23:32Z
dc.date.available 2021-04-29T08:23:32Z
dc.date.issued 2019-01-05
dc.identifier.bibliographicCitation Hernández-Jiménez, F., Soria-Verdugo, A., Acosta-Iborra, A. & Santana, D. (2019). Exergy recovery from solar heated particles to supercritical CO2. Applied Thermal Engineering, vol. 146, pp. 469–481.
dc.identifier.issn 1359-4311
dc.identifier.uri http://hdl.handle.net/10016/32506
dc.description.abstract In this work, the technical feasibility of a fluidized and a fixed bed heat exchanger in a concentrating solar power (CSP) tower for heat recovery applications is analysed using Two-Fluid Model simulations. The heat recovery process analysed in this work corresponds to the discharge of sensible heat from solid particles. In the cases studied, the fluidizing agent of the bed is carbon dioxide (CO2) in supercritical conditions and the particles, which constitute the bed material, are sensible heat storage material. CO2 is gaining attention in its application as a working fluid in thermodynamic cycles for power generation, especially in transcritical and supercritical conditions due to its high density and excellent heat transfer characteristics. Currently, research is focused on exploring the CO2 capabilities when used in combination with CSP technologies, together with systems that allow the storage and recovery of the solar thermal energy. Fixed or fluidized beds work as a direct contact heat exchanger between the particles and the working fluid that percolates through the bed material. Several bed configurations are presented to derive the optimal configuration of the bed that enhances the efficiency from both the energetic and the exergetic points of view. The results indicate that a fixed bed heat exchanger produces a maximum increase of availability in the CO2 flow during longer times than a fluidized bed heat exchanger. Therefore, to maximise the exergy recovery from solar heated particles to supercritical CO2 a fixed bed heat exchanger is more suitable than a fluidized bed heat exchanger.
dc.format.extent 13
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2018 Elsevier Ltd.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Supercritical carbon dioxide
dc.subject.other Fluidized bed
dc.subject.other Fixed bed
dc.subject.other Heat exchanger
dc.subject.other Concentrating solar power
dc.title Exergy recovery from solar heated particles to supercritical CO2
dc.type article
dc.subject.eciencia Energías Renovables
dc.identifier.doi https://doi.org/10.1016/j.applthermaleng.2018.10.009
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ENE2015-69486-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 469
dc.identifier.publicationlastpage 481
dc.identifier.publicationtitle Applied Thermal Engineering
dc.identifier.publicationvolume 146
dc.identifier.uxxi AR/0000022891
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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