Steinbrecher, Julian und Braun, Markus und Bauer, Thomas und Kunkel, Sebastian und Bonk, Alexander (2023) Solar Salt above 600 ◦C: Impact of Experimental Design on Thermodynamic Stability Results. Energies, 16 (14), Seite 5241. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en16145241. ISSN 1996-1073.
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Offizielle URL: https://www.mdpi.com/1996-1073/16/14/5241
Kurzfassung
Thermal energy storage (TES) based on molten salts has been identified as a key player in the transition from fossil fuels to renewable energy sources. Solar Salt, a mixture of NaNO3 (60 wt%) and KNO3 (40 wt%), is currently the most advanced heat transfer and storage material used in concentrating solar power (CSP) plants. Here, it is utilized to produce electricity via a Rankine cycle, with steam temperatures reaching 550 °C. The goal of this study is to increase the operating temperature of solar salt to over 600 °C, allowing it to be adapted for use in high-temperature Rankine cycles with steam temperatures greater than 600 °C. Yet, this goal is impaired by the lack of available thermodynamic data given the salt's complex high-temperature decomposition and corrosion chemistry. The study explores the thermodynamics of the decomposition reactions in solar salt, with a focus on suppressing decomposition into corrosive oxide ions up to a temperature of 620 °C. The results provide a new understanding of the stabilization of solar salt at previously unexplored temperatures with effective utilization of gas management techniques
elib-URL des Eintrags: | https://elib.dlr.de/200890/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Solar Salt above 600 ◦C: Impact of Experimental Design on Thermodynamic Stability Results | ||||||||||||||||||||||||
Autoren: |
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Datum: | Mai 2023 | ||||||||||||||||||||||||
Erschienen in: | Energies | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
Band: | 16 | ||||||||||||||||||||||||
DOI: | 10.3390/en16145241 | ||||||||||||||||||||||||
Seitenbereich: | Seite 5241 | ||||||||||||||||||||||||
Verlag: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||||||||||
ISSN: | 1996-1073 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | molten salt; nitrite formation; oxide formation; high-temperature chemistry; thermal energy storage; concentrated solar power (CSP) | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||
HGF - Programm: | Materialien und Technologien für die Energiewende | ||||||||||||||||||||||||
HGF - Programmthema: | Thermische Hochtemperaturtechnologien | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SP - Energiespeicher | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Thermochemische Prozesse | ||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Thermische Prozesstechnik | ||||||||||||||||||||||||
Hinterlegt von: | Bonk, Alexander | ||||||||||||||||||||||||
Hinterlegt am: | 21 Dez 2023 13:12 | ||||||||||||||||||||||||
Letzte Änderung: | 08 Jan 2024 11:25 |
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