Roßkopf, Christian und Afflerbach, Sandra und Schmidt, Matthias und Görtz, Burkhard und Torsten, Kowald und Linder, Marc und Reinhard, Trettin (2015) Investigations of nano coated calcium hydroxide cycled in a thermochemical heat storage. Energy Conversion and Management (97), Seiten 94-102. Elsevier. doi: 10.1016/j.enconman.2015.03.034. ISSN 0196-8904.
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Offizielle URL: http://www.sciencedirect.com/science/article/pii/S0196890415002526
Kurzfassung
Thermochemical heat storage systems are a promising new technology for concentrated solar power plants and can contribute to improve the efficiency of industrial processes Neveu et al. (2013) [21]. However, for example for the reaction system calcium oxide/calcium hydroxide (CaO/Ca(OH)2), the good availability at low cost is accompanied by poor powder properties that demand complex reactor solutions. During thermochemical cycling agglomeration effects occur and originate inhomogeneity resulting in permanent changes of bed characteristics especially related to the heat and mass transport. One approach in order to stabilize the material is to coat the reacting material with nanoparticles in order to minimize attractive forces leading to less agglomeration. But, high temperatures, change of volume and surface configuration, permeance for reaction gas, side reactions and mechanical stresses within the storage represent challenges for nanoparticles. Therefore, in this work, Aerosil® as additive for thermochemical storage is investigated during cycling in an indirect operating pilot-scale thermochemical reactor with regard to side reactions, stability on the surface and various coating configurations. It is shown that the reaction bed properties can be highly improved depending on the modality of the insertion process whereas occurring side reactions lead to a stabilization of the surface structure at the expense of a capacity loss of the thermochemical reactor.
elib-URL des Eintrags: | https://elib.dlr.de/95813/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Investigations of nano coated calcium hydroxide cycled in a thermochemical heat storage | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2015 | ||||||||||||||||||||||||||||||||
Erschienen in: | Energy Conversion and Management | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.enconman.2015.03.034 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 94-102 | ||||||||||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||||||||||
ISSN: | 0196-8904 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | thermochemical heat storage; calcium hydroxide;nanoparticles; agglomeration; aerosil; rheinhardbrunsite;calcio-chondrodite | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||||||||||
HGF - Programm: | Erneuerbare Energie | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | E SF - Solarforschung (alt) | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SF - Solarforschung | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Thermische Energiespeicher (alt) | ||||||||||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Thermische Prozesstechnik | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Schmidt, Dr. Matthias | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 15 Apr 2015 13:35 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 28 Nov 2023 09:13 |
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