Bonk, Alexander and Braun, Markus and Hanke, Andrea and Sötz, Veronika and Bauer, Thomas (2019) Enhancing the Thermal Stability of Solar Salt up to 600°C in Extended Lab-Scale Experiments. Energy Procedia. Elsevier. doi: 10.1063/5.0029151. ISSN 1876-6102.
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Abstract
Future trends push TES towards higher temperatures to increase solar-to-electricity conversion efficiency and novel storage materials are often considered the only viable option. To date these candidates suffer from either high costs (carbonate salts containing Li+) or severely attack structural materials (chloride salts) and are far from industrial implementation. An alternative approach is investigated in our work - the use of the classical Solar Salt with sophisticated gas management which selectively shifts the chemical equilibrium to the stable nitrate-side of the decomposition reaction. We demonstrate that the thermal stability of conventional Solar Salt (60-40wt % NaNO3-KNO3) is substantially increased when the storage system including the gas system is simply but effectively sealed. The key to this novel data is the unique feature of in-situ sample extraction and post-analysis that allows for a quasi in-situ determination of molten salt stability in terms of nitrite and oxide ion formation. Our investigations present clear evidence on the enhanced thermal stability at an experimental scale of about 100 g that is two magnitudes larger than conventional thermal analysis experiments.
Item URL in elib: | https://elib.dlr.de/132337/ | ||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||
Title: | Enhancing the Thermal Stability of Solar Salt up to 600°C in Extended Lab-Scale Experiments | ||||||||||||||||||
Authors: |
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Date: | 2019 | ||||||||||||||||||
Journal or Publication Title: | Energy Procedia | ||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||
DOI : | 10.1063/5.0029151 | ||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||
ISSN: | 1876-6102 | ||||||||||||||||||
Status: | Published | ||||||||||||||||||
Keywords: | Thermal Energy Storage, Molten Nitrate Salt, Thermal Stability, Maximum Temperature Enhancement, | ||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | ||||||||||||||||||
HGF - Program Themes: | Thermal Energy Storage | ||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||
DLR - Program: | E SP - Energy Storage | ||||||||||||||||||
DLR - Research theme (Project): | E - Thermochemical Processes (Storage) (old) | ||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Thermal Process Technology | ||||||||||||||||||
Deposited By: | Bonk, Alexander | ||||||||||||||||||
Deposited On: | 19 Dec 2019 15:44 | ||||||||||||||||||
Last Modified: | 13 May 2022 13:03 |
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