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Comparison of Degradation on Aluminum Reflectors for Solar Collectors due to Outdoor Exposures and Accelerated Aging

Wette, Johannes und Sutter, Florian und Fernandez-Garcia, Aranzazu und Ziegler, Stefan und Dasbach, Reinhard (2016) Comparison of Degradation on Aluminum Reflectors for Solar Collectors due to Outdoor Exposures and Accelerated Aging. Energies, 9 (916). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en9110916. ISSN 1996-1073.

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Offizielle URL: http://www.mdpi.com/journal/energies

Kurzfassung

Reflectors for concentrated solar thermal technologies need to withstand 20 or even 30 years of outdoor exposure without significant loss of solar specular reflectance. In order to test the durability of innovative reflectors within a shorter period of time, an accelerated aging methodology is required. The problem with accelerated testing is that poor correlation between laboratory and field test results has been achieved in the past. This is mainly because unrealistic degradation mechanisms are accelerated in the weathering chambers. In order to define a realistic testing procedure, a high number of accelerated aging tests have been performed on differently coated aluminum reflectors. The degradation mechanisms of the accelerated tests have been classified and systematically compared to samples that have been exposed at nine different exposure sites outdoors. Besides the standardized aging tests, innovative aging procedures have been developed in such way that the agreement to the degradation pattern observed outdoors is increased. Although degradation depends on materials and location, five generic degradation mechanisms were detected. Standardized tests only reproduced one or two of the five mechanisms detected outdoors. Additionally, several degradation effects that were not observed outdoors appeared. The innovative accelerated aging tests of artificially soiled samples were able to reproduce three of the five mechanisms observed outdoors, presenting a much more realistic overall degradation pattern.

elib-URL des Eintrags:https://elib.dlr.de/108349/
Dokumentart:Zeitschriftenbeitrag
Titel:Comparison of Degradation on Aluminum Reflectors for Solar Collectors due to Outdoor Exposures and Accelerated Aging
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Wette, JohannesJohannes.Wette (at) dlr.dehttps://orcid.org/0000-0003-1389-5176NICHT SPEZIFIZIERT
Sutter, FlorianFlorian.Sutter (at) dlr.dehttps://orcid.org/0000-0002-2981-5807NICHT SPEZIFIZIERT
Fernandez-Garcia, Aranzazuarantxa.fernandez (at) psa.esNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ziegler, StefanalanodNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Dasbach, ReinhardAlmecoNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:November 2016
Erschienen in:Energies
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:9
DOI:10.3390/en9110916
Verlag:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:1996-1073
Status:veröffentlicht
Stichwörter:concentrated solar power; accelerated aging; degradation; durability; aluminum solar reflector; corrosion
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende solarthermische Technologien
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Einfluss von Wüstenbedingungen (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung > Qualifizierung
Hinterlegt von: Kruschinski, Anja
Hinterlegt am:05 Dez 2016 14:31
Letzte Änderung:03 Nov 2023 07:28

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