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Thermochemical Heat Storage for Baseload Concentrated Solar Power Generation

Sattler, Christian and Agrafiotis, Christos and Roeb, Martin and Tescari, Stefania and Wong, Bunsen (2015) Thermochemical Heat Storage for Baseload Concentrated Solar Power Generation. In: 2015 MRS Fall Meeting & Exhibition Abstracts DVD. 2015 MRS Fall Meeting & Exhibition, 29. Nov. - 4. Dez. 2015, Boston, MA, USA.

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Official URL: http://www.mrs.org/meetings


Recent developments in solar-thermal power generation aim as well to achieve higher temperatures to increase the efficiencies of the power cycles as to store the solar energy to enable baseload power generation from a transient energy source. Thermochemical redox processes are an option to store large amounts of solar energy in a compact storage system. The enthalpy effects of these reversible chemical reactions can be exploited. Oxides of multivalent metals in particular, capable of being reduced and oxidized under air atmosphere with significant heat effects are perfect candidates for air-operated Concentrated Solar Power plants since in this case air can be used as both the heat transfer fluid and the reactant (O2) and therefore can come to direct contact with the storage material (oxide). Examples are manganese oxide and cobalt oxide cyclic redox schemes. They can be cycled in the range of 800-1000oC. Porous ceramic structures like honeycombs and foams are favorable for heat exchange applications, the idea of employing such structures either coated with or entirely made of a redox material like Co3O4, as a hybrid sensible-thermochemical solar energy storage system in air-operated Concentrated Solar Power plants has been set forth and tested. At first, small-scale, redox-inert, cordierite foams and honeycombs were coated with Co3O4 and tested for cyclic reduction-oxidation operation via Thermo-Gravimetric Analysis. To improve the volumetric heat storage capacity of such reactors, ceramic foams made entirely of Co3O4 were manufactured. Such foams exhibited satisfactory structural integrity and were comparatively tested vs. the “plain” Co3O4 powder and the Co3O4-coated, cordierite supports under the same cyclic redox conditions. A thermochemical storage system prototype was modeled, built and implemented for the first time in an existing concentrated solar power facility, DLR’s solar tower in Juelich, Germany.

Item URL in elib:https://elib.dlr.de/100366/
Document Type:Conference or Workshop Item (Speech)
Title:Thermochemical Heat Storage for Baseload Concentrated Solar Power Generation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Agrafiotis, Christoschristos.agrafiotis (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Tescari, Stefaniastefania.tescari (at) dlr.deUNSPECIFIED
Wong, Bunsenbunsen.wong (at) ga.comUNSPECIFIED
Date:1 December 2015
Journal or Publication Title:2015 MRS Fall Meeting & Exhibition Abstracts DVD
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:concentrated solar power, heat storage, thermochemical cycles, metal oxides, sulfur
Event Title:2015 MRS Fall Meeting & Exhibition
Event Location:Boston, MA, USA
Event Type:international Conference
Event Dates:29. Nov. - 4. Dez. 2015
Organizer:Materials Research 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: Jülich , Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:04 Dec 2015 13:37
Last Modified:20 Jun 2021 15:47

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