Gong, Qing and Ding, Wenjin and Bonk, Alexander and Bauer, Thomas (2022) Molten chloride salt technology for next-generation CSP plants: An economically competitive future scenario using Fe-based alloys with corrosion control. SolarPaces 2022, 2022-09-26 - 2022-09-30, Albuquerque, USA.
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Abstract
MgCl2-KCl-NaCl is one of the most promising chloride-salt mixtures for thermal energy storage (TES) in next-generation CSP plants with the advantages of low melting point (~383 °C), high thermal stability (stable at 800 °C), low vapor pressure (~ 1 kPa at 800 °C), and low cost (<0.35 USD/kg) [1]. With the chloride-TES and the advanced supercritical carbon dioxide (sCO2) Brayton power cycle, the next-generation (Gen3) concentrating solar power (CSP) plants could have a high thermal to electric efficiency of >50 % with >700 °C operating temperatures [2]. However, the high corrosivity of molten chloride salt to commercial Fe-Cr-Ni alloy results in the cost of chloride-TES using Ni-based alloys being several times higher than commercial nitrate-TES. It impedes the application of chloride-TES [2-5]. Our previous work showed that with the protection of corrosion inhibitor Mg. the corrosion of Fe-Cr-Ni can be significantly mitigated in molten chloride salt at 700 °C [6]. In this work, the possibility of using Fe-based alloys as the main structural materials for the hot and cold parts of the chloride-TES system is investigated.
Item URL in elib: | https://elib.dlr.de/190730/ | ||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
Title: | Molten chloride salt technology for next-generation CSP plants: An economically competitive future scenario using Fe-based alloys with corrosion control | ||||||||||||||||||||
Authors: |
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Date: | 2022 | ||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | Thermal Energy Storage, Long Duration Energy Storage, TES, LDES, Molten Salt, High Temperature Corrosion | ||||||||||||||||||||
Event Title: | SolarPaces 2022 | ||||||||||||||||||||
Event Location: | Albuquerque, USA | ||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||
Event Start Date: | 26 September 2022 | ||||||||||||||||||||
Event End Date: | 30 September 2022 | ||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||
HGF - Program: | Materials and Technologies for the Energy Transition | ||||||||||||||||||||
HGF - Program Themes: | Electrochemical Energy Storage | ||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||
DLR - Program: | E SP - Energy Storage | ||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Storage | ||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Thermal Process Technology | ||||||||||||||||||||
Deposited By: | Bonk, Alexander | ||||||||||||||||||||
Deposited On: | 12 Dec 2022 18:23 | ||||||||||||||||||||
Last Modified: | 11 Oct 2024 11:24 |
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