Lidor, Alon und Fend, Thomas und Roeb, Martin und Sattler, Christian (2020) Parametric investigation of a volumetric solar receiver-reactor. Solar Energy, 204, Seiten 256-269. Elsevier. doi: 10.1016/j.solener.2020.04.045. ISSN 0038-092X.
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Offizielle URL: https://www.sciencedirect.com/science/article/abs/pii/S0038092X20304205?via%3Dihub
Kurzfassung
Hydrogen production by solar-driven 2-step reduction–oxidation cycles has been successfully demonstrated in recent years. While the demonstrated efficiencies were quite low (up to 5.25% solar-to-fuel efficiency), there is a large potential for much higher efficiencies. This paper presents a detailed parametric investigation of a large scale (>100 kW) volumetric solar receiver-reactor, performed using a finite volume method model. The reactor temperature profile and extent of reduction are investigated by evaluating the effects of heat recovery, sweep gas mass flow, radiation flux and porosity. The current reactor concept is shown to have a temperature gradient across the absorber of 500–700 K, leading to a mean ceria reduction extent of 0.004–0.012, thus limiting the amount of hydrogen that can be generated to the order of several milligrams per cycle or less. It is also shown that heat recovery can reduce the temperature gradient across the absorber to 350 K, thus increasing the hydrogen generation significantly, up to four orders of magnitude higher than with no heat recovery (up to 5.25 g/cycle). The solar heat flux on the receiver can also significantly increase the hydrogen production and reduce the reduction step duration. Thus, the optimization of both design and operation of large volumetric reactors can increase the hydrogen generation rate significantly.
elib-URL des Eintrags: | https://elib.dlr.de/135158/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Titel: | Parametric investigation of a volumetric solar receiver-reactor | ||||||||||||||||||||
Autoren: |
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Datum: | 1 Juli 2020 | ||||||||||||||||||||
Erschienen in: | Solar Energy | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||
Band: | 204 | ||||||||||||||||||||
DOI: | 10.1016/j.solener.2020.04.045 | ||||||||||||||||||||
Seitenbereich: | Seiten 256-269 | ||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||
ISSN: | 0038-092X | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Solar energy Thermochemical cycles Hydrogen generation Solar fuels | ||||||||||||||||||||
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: | 09 Okt 2020 10:32 | ||||||||||||||||||||
Letzte Änderung: | 23 Okt 2023 14:30 |
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