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Acceptance criteria for accelerated aging testing of silvered-glass mirrors for concentrated solar power technologies

Sutter, Florian and Fernandez-Garcia, Aranzazu and Wette, Johannes and Reche-Navarro, J. Tomas and Martinez-Arcos, Lucia (2019) Acceptance criteria for accelerated aging testing of silvered-glass mirrors for concentrated solar power technologies. Solar Energy Materials and Solar Cells (193), pp. 361-371. Elsevier. DOI: 10.1016/j.solmat.2019.01.008 ISSN 0927-0248

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Official URL: https://doi.org/10.1016/j.solmat.2019.01.008


Solar reflectors for Concentrating Solar Power (CSP) technologies are required to maintain their optical properties in demanding environments for more than 20 years of service-life. The durability of the commonly used silvered-glass reflectors is typically qualified by means of accelerated aging. Recently, the Spanish standardization committee UNE has published the first specific standard for this topic, which defines a set of accelerated aging tests for CSP reflectors. However, the standard does not contain pass/fail criteria. This paper proposes useful acceptance criteria for the accelerated tests defined by UNE, helping to interpret the obtained Degradation results. The criteria have been determined by analyzing the collected accelerated aging data over the past 5 years in the OPAC laboratory, a joint research group of DLR and CIEMAT. Data from six different 4 mm silvered-glass manufacturers is presented, covering nearly the entire market of commercially available silvered-glass mirrors, and going way beyond the recommended testing times of the UNE standard. The data may be used to benchmark initial reflective properties (before aging) and the performance during accelerated durability testing. In addition, recommendations for improvements of the standard are given and an estimate of the acceleration factor of the Copper Accelerate Salt Spray (CASS) test with respect to a highly corrosive outdoor environment is presented.

Item URL in elib:https://elib.dlr.de/126366/
Document Type:Article
Title:Acceptance criteria for accelerated aging testing of silvered-glass mirrors for concentrated solar power technologies
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Sutter, FlorianFlorian.Sutter (at) dlr.dehttps://orcid.org/0000-0002-2981-5807
Fernandez-Garcia, Aranzazuarantxa.fernandez (at) psa.esUNSPECIFIED
Wette, JohannesJohannes.Wette (at) dlr.dehttps://orcid.org/0000-0003-1389-5176
Reche-Navarro, J. TomasSF-QLFUNSPECIFIED
Date:January 2019
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.2019.01.008
Page Range:pp. 361-371
Series Name:ElSevier
Keywords:accelerated aging testing, solar reflector, reflectance, durability, acceptance criteria, concentrated solar power
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:12 Mar 2019 15:11
Last Modified:11 Mar 2020 15:31

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