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Degradation of concentrating solar thermal reflectors in acid rain atmospheres

Garcia-Segura, A. and Fernandez-Garcia, Aranzazu and Ariza, M.J. and Sutter, Florian and Valenzuela, Loreto (2018) Degradation of concentrating solar thermal reflectors in acid rain atmospheres. Solar Energy Materials and Solar Cells, 186, pp. 92-104. Elsevier. DOI: 10.1016/j.solmat.2018.06.032 ISSN 0927-0248

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Official URL: http://www.elsevier.com/locate/solmat

Abstract

Given the importance that concentrating solar power technologies have had in recent years, the interaction between humid atmospheres in which SO2 is the main pollutant and the metal reflecting layers of the solar concentrators is a major concern that should be addressed. Previous durability studies have urged the importance of designing an accelerated aging test protocol for simulating aggressive industrial atmospheres that solar reflector materials are bound to encounter. Therefore, three types of reflectors were tested in an acid-rain (or Kesternich) chamber at various temperatures and gas concentrations based on the DIN 50018 and ISO 6988 standards. The results showed the significant effect of high SO2 concentrations rather than high temperatures on silvered-glass reflectors, although synergy should not be disregarded. Strong reductions in specular reflectance were found for one type of silvered reflector compared to another type, highlighting the significance of material processing and its effects on their final performance. Aluminum reflectors were not damaged as much as silvered-glass reflectors, but under microscopic inspection, a wide range of noticeable corrosion defects could be found in all the materials. Comparisons between the most representative Kesternich test and samples from an outdoor industrial site permitted realistic lifetime correlations for commercial silvered-glass reflectors.

Item URL in elib:https://elib.dlr.de/120691/
Document Type:Article
Title:Degradation of concentrating solar thermal reflectors in acid rain atmospheres
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Garcia-Segura, A.CIEMAT PSAUNSPECIFIED
Fernandez-Garcia, Aranzazuarantxa.fernandez (at) psa.esUNSPECIFIED
Ariza, M.J.Universidad de AlmeriaUNSPECIFIED
Sutter, FlorianFlorian.Sutter (at) dlr.dehttps://orcid.org/0000-0002-2981-5807
Valenzuela, LoretoCIEMAT-PSAUNSPECIFIED
Date:June 2018
Journal or Publication Title:Solar Energy Materials and Solar Cells
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:186
DOI :10.1016/j.solmat.2018.06.032
Page Range:pp. 92-104
Publisher:Elsevier
ISSN:0927-0248
Status:Published
Keywords:Concentrating solar technology, solar reflector, accelerated aging test, acid rain, Service lifetime prediction
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:18 Sep 2018 08:30
Last Modified:31 Jul 2019 20:18

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