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Influence of gaseous pollutants and their synergistic effects on the aging of reflector materials for concentrating solar thermal technologies

Garcia-Segura, A. and Fernandez-Garcia, Arantxa and Ariza, M.J. and Sutter, Florian and Diamantino, Teresa and Martinez-Arcos, Lucia and Reche-Navarro, J. Tomas and Valenzuela, Loreto (2019) Influence of gaseous pollutants and their synergistic effects on the aging of reflector materials for concentrating solar thermal technologies. Solar Energy Materials and Solar Cells, 2000 (109955). Elsevier. DOI: 10.1016/j.solmat.2019.109955 ISSN 0927-0248

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Official URL: https://doi.org/10.1016/j.solmat.2019.109955


Concentrating solar thermal technologies have experienced an important boost in the last few years. Besides the production of electricity, they are particularly useful for the supply of industrial process heat. The industrial atmospheres affecting these solar plants typically contain gaseous pollutants that are likely to promote corrosion on the components of the solar facility, specifically solar reflectors, thereby compromising their optimal performance and the overall system efficiency. Seven accelerated aging tests were designed to study the effects of three air pollutants (H2S, SO2 and NO2) on the durability of two commercially available reflector types (silveredglass and aluminum), both in single-gas tests and in multicomponent gas mixtures. Additionally, the same material types were exposed outdoors at five representative polluted sites, including industrial, urban and coastal environments. Reflectance and optical microscope monitoring corroborated which degree of corrosion was developed on a specific type of reflector in the different tests with gaseous pollutants, as well as the synergistic effects of gas combinations. For example, tests with sulfur were harmful for silvered-glass reflectors (up to a total of 16 corrosion spots), whereas aluminum was particularly affected by tests with NO2 (numerous micro spots of around 50 μm size). Moreover, comparisons of the corrosion patterns found in accelerated-aging and outdoor exposures revealed which laboratory test reproduced the different real polluted atmospheres in the most realistic way, which is the main goal of this work. For instance, the degradation found at Site 2 was reproduced by Test NO2+SO2, with an acceleration factor of 27.

Item URL in elib:https://elib.dlr.de/130794/
Document Type:Article
Title:Influence of gaseous pollutants and their synergistic effects on the aging of reflector materials for concentrating solar thermal technologies
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Garcia-Segura, A.ciemat psaUNSPECIFIED
Fernandez-Garcia, ArantxaCIEMAT-PSAUNSPECIFIED
Ariza, M.J.Universidad de AlmeriaUNSPECIFIED
Sutter, FlorianFlorian.Sutter (at) dlr.dehttps://orcid.org/0000-0002-2981-5807
Diamantino, TeresaLaboratorio Nacional de Energia e Geologia LisboaUNSPECIFIED
Reche-Navarro, J. TomasSF-QLFUNSPECIFIED
Journal or Publication Title:Solar Energy Materials and Solar Cells
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.solmat.2019.109955
Keywords:Concentrating solar thermal technology Solar reflector Durability test Multicomponent gas mixture Synergistic effect Acceleration factor
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Impact of Desert Environment
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualification
Deposited By: Kruschinski, Anja
Deposited On:25 Nov 2019 10:09
Last Modified:27 Dec 2019 09:18

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