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Thermochemical solar energy storage via functionalized porous ceramic structures

Agrafiotis, Christos and Roeb, Martin and Sattler, Christian (2014) Thermochemical solar energy storage via functionalized porous ceramic structures. 13th International Conference on Modern Materials and Technologies - CIMTEC 2014,, 8.-19. Jun. 2014, Montecatini Terme, Italien.

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Thermochemical storage of solar heat in Concentrated Solar Power (CSP) plants exploits the heat effects of reversible chemical reactions: solar heat produced during on-sun operation is used to power an endothermic chemical reaction; if this reaction is completely reversible the thermal energy can be entirely recovered by the reverse reaction during off-sun operation. Redox reactions of multivalent solid oxides in particular, can be directly coupled to CSP plants using air as heat transfer fluid, since in this case air can be simultaneously used as a reactant in the storage system. In such applications, the inherent advantages of porous ceramic foams/honeycombs i.e. high geometric surface area, good gas-solid contact, accommodation of high gas flow rates with low pressure drop and enhanced heat transfer, can be combined with the incorporation in their structure of suitable redox oxides capable for cyclic redox operation with high reaction heat effects. Tests on such laboratory-scale structures using cobalt oxide as a model redox system are presented, demonstrating its efficient long-term cyclic operation. Properly engineered application-specific, modular thermochemical reactor/heat exchanger concepts are also proposed to enhance the utilization of heat transfer fluid enthalpy.

Item URL in elib:https://elib.dlr.de/91691/
Document Type:Conference or Workshop Item (Speech)
Title:Thermochemical solar energy storage via functionalized porous ceramic structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Agrafiotis, Christoschristos.agrafiotis (at) dlr.deUNSPECIFIED
Roeb, Martinmartin.roeb (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:8 June 2014
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Thermochemical storage solar energy porous ceramics
Event Title:13th International Conference on Modern Materials and Technologies - CIMTEC 2014,
Event Location:Montecatini Terme, Italien
Event Type:international Conference
Event Dates:8.-19. Jun. 2014
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:10 Nov 2014 15:21
Last Modified:20 Jun 2021 15:45

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