Agrafiotis, Christos und Tescari, Stefania und Roeb, Martin und Sattler, Christian (2017) Oxides and porous structures based on earth-abundant elements for hybrid sensible/thermochemical solar energy storage in air-operated solar thermal power plants. In: AIP Conference Proceedings, 2033 (100001). SolarPACES 2017, 2017-09-26 - 2017-09-29, Santiago, Chile. doi: 10.1063/1.5067122.
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Offizielle URL: https://doi.org/10.1063/1.5067122
Kurzfassung
The concept of regenerative sensible heat storage in porous solids employed in air-operated solar thermal power plants can be hybridized with thermochemical storage by coating/manufacturing entirely the heat exchange modules with oxides of multivalent metals undergoing reduction/oxidation reactions with significant heat effects. A prerequisite for eventual commercialization of such thermochemical storage concepts is the use of low-cost, environmental-friendly, oxide compositions capable of reversible reduction/oxidation under air with high reaction enthalpies. Equally necessary is the shaping of such oxides into structures operating as integrated reactors/heat exchangers. In this perspective, a specific Mn-based mixed oxide system of composition (0.8)(Mn2O3)*(0.2)(Fe2O3) was investigated. The work involved shaping the powder to porous foams and pellets which were comparatively tested in an infrared furnace, to clarify the effect of high heating/cooling rates on redox performance and structure stability. The redox performance of such Mn-rich systems was found sensitive to exposure at high temperatures. As long as a temperature of ~ 1100oC is not exceeded during redox cycling, both powder and pellets seem to operate reversibly for a high number of cycles. However, the high sintering temperatures (1350oC) required to induce strength to high-porosity structures like foams before their use as thermochemical storage media, had an adverse effect on their redox performance.
elib-URL des Eintrags: | https://elib.dlr.de/117209/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Oxides and porous structures based on earth-abundant elements for hybrid sensible/thermochemical solar energy storage in air-operated solar thermal power plants | ||||||||||||||||||||
Autoren: |
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Datum: | 26 September 2017 | ||||||||||||||||||||
Erschienen in: | AIP Conference Proceedings | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Band: | 2033 | ||||||||||||||||||||
DOI: | 10.1063/1.5067122 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Oxides, porous structures, heat storage, sensible, thermochemical, concentrated solar radiation | ||||||||||||||||||||
Veranstaltungstitel: | SolarPACES 2017 | ||||||||||||||||||||
Veranstaltungsort: | Santiago, Chile | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsbeginn: | 26 September 2017 | ||||||||||||||||||||
Veranstaltungsende: | 29 September 2017 | ||||||||||||||||||||
Veranstalter : | SolarPACES | ||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||
HGF - Programm: | Erneuerbare Energie | ||||||||||||||||||||
HGF - Programmthema: | Solare Brennstoffe | ||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||
DLR - Forschungsgebiet: | E SW - Solar- und Windenergie | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Solare Brennstoffe (alt) | ||||||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Solarforschung > Solare Verfahrenstechnik | ||||||||||||||||||||
Hinterlegt von: | Sattler, Prof. Dr. Christian | ||||||||||||||||||||
Hinterlegt am: | 18 Dez 2017 12:02 | ||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:21 |
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