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A New Approach to Low-cost, Solar Salt Resistant Structural Materials for Concentrating Solar Power (CSP) and Thermal Energy Storage (TES)

Aarab, Fadoua and Kuhn, Bernd and Bonk, Alexander and Bauer, Thomas (2021) A New Approach to Low-cost, Solar Salt Resistant Structural Materials for Concentrating Solar Power (CSP) and Thermal Energy Storage (TES). Metals (11). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/met11121970. ISSN 2075-4701.

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Official URL: https://www.mdpi.com/2075-4701/11/12/1970/htm

Abstract

“Concentrated solar power” (CSP) and thermal energy storage (TES) are promising renewable energy technologies, which have gained increasing interest and practical application in recent years. CSP and TES systems typically utilize molten salts such as the so-called “solar salt”, a mixture of 60 wt.% NaNO3 and 40 wt.% KNO3, for heat transfer and storage. The overall efficiency of commercially operating CSP and TES systems is currently limited, because of solar salt thermal stability, which prevents process temperatures higher than 600 ◦C. Even at these temperatures, corrosion of the structural materials applied in salt guiding pipework, tubes and containers is a matter of concern in long-term operation, which necessitates careful material selection. This paper outlines the superior salt corrosion behavior of a novel low-cost, Al2O3-forming, ferritic, Laves phase-strengthened (i.e., structural) steel in NaNO3/KNO3 solar salt at 600 ◦C. Directions for the further development of the LB2230 trial steel towards improved structural properties are derived in comparison to its predecessor Crofer®22 H

Item URL in elib:https://elib.dlr.de/148150/
Document Type:Article
Title:A New Approach to Low-cost, Solar Salt Resistant Structural Materials for Concentrating Solar Power (CSP) and Thermal Energy Storage (TES)
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Aarab, FadouaUNSPECIFIEDUNSPECIFIED
Kuhn, BerndUNSPECIFIEDUNSPECIFIED
Bonk, AlexanderAlexander.Bonk (at) dlr.dehttps://orcid.org/0000-0002-0676-7267
Bauer, Thomasthomas.bauer (at) dlr.dehttps://orcid.org/0000-0003-4080-7944
Date:2021
Journal or Publication Title:Metals
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.3390/met11121970
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2075-4701
Status:Published
Keywords:concentrating solar power; salt corrosion resistance; protective Al2O3 scale; structural material development
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Bonk, Alexander
Deposited On:11 Jan 2022 09:50
Last Modified:14 Jan 2022 15:04

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