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Redox-oxide-based porous ceramics for efficient solar thermal energy conversion and storage

Agrafiotis, Christos and Becker, Andreas and Roeb, Martin and Sattler, Christian (2015) Redox-oxide-based porous ceramics for efficient solar thermal energy conversion and storage. 11th CMCEE-International Symposium on Ceramic Materials and Components for Energy and Environmental Applications, 14.-19. Jun. 2015, Vancouver, Canada.

Full text not available from this repository.

Official URL: http://ceramics.org/meetings/11th-international-symposium-on-ceramic-materials-and-components-for-energy-and-environmental-applications

Abstract

Air-operated Concentrated Solar Power Tower plants store the solar energy provided during on-sun operation as sensible heat in porous solid materials that operate as recuperators during off-sun operation. This concept can be rendered to a “hybrid” sensible/thermochemical one via coating the porous heat exchange modules with oxides of multivalent metals for which their reduction/oxidation reactions are accompanied by significant heat effects (e.g. Co3O4/CoO, BaO2/BaO, Mn2O3/Mn3O4, CuO/Cu2O) or by manufacturing them entirely of such oxides. Based on the construction modularity of such systems, cascades of porous structures incorporating different redox oxide materials and distributed in a certain rational pattern in space tailored to the local temperature of the heat transfer medium have been tested to enhance its utilization and the storage of its enthalpy. Experiments with lab-scale ceramic honeycomb and foam cascades compared their sensible-only to the hybrid sensible/thermochemical capability as a function of redox material kind and loading, porous support employed, distribution along the reactor and air flow rate. The most promising configuration has been transferred to a solar-operated reactor. The experiments have shown that such an approach can maximize the amount of redox powder that can be thermochemically exploited efficiently in a given thermochemical reactor volume.

Item URL in elib:https://elib.dlr.de/99235/
Document Type:Conference or Workshop Item (Speech)
Title:Redox-oxide-based porous ceramics for efficient solar thermal energy conversion and storage
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Agrafiotis, Christoschristos.agrafiotis (at) dlr.deUNSPECIFIED
Becker, AndreasDLR, SF-SOLUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:14 June 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:concentrated solar Radiation, heat storage, thermochemical cycles, metal oxides
Event Title:11th CMCEE-International Symposium on Ceramic Materials and Components for Energy and Environmental Applications
Event Location:Vancouver, Canada
Event Type:international Conference
Event Dates:14.-19. Jun. 2015
Organizer:The American Ceramic Society
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solar Process Technology (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:09 Nov 2015 09:16
Last Modified:10 May 2016 23:34

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