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Guidelines Accelerated Aging Testing of Aluminum Reflectors for Concentrated Solar Power

Sutter, Florian and Wette, Johannes and Fernandez-Garcia, Aranzazu and Ziegler, Stefan and Dasbach, R. (2016) Guidelines Accelerated Aging Testing of Aluminum Reflectors for Concentrated Solar Power. Other.

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Official URL: http://www.solarpaces.org/tasks/task-iii-solar-technology-and-advanced-applications

Abstract

This testing guideline specifies the recommended accelerated aging conditions to reproduce realistic degradation mechanisms on aluminum reflectors, which have been observed during a 3 year outdoor exposure testing campaign at 9 exposure sites with 9 different aluminum reflector types (7 of them protected with a SiO2 based sol-gel coating, 2 of them protected by a polymeric coating). Accelerated aging parameters have been derived to simulate the exposure after 3 and 10 years at three reference outdoor scenarios: “extreme desert”, “desert” and “coastal”. The parameters have been achieved by averaging the 9 tested material types. However, if the material to be tested deviates significantly in its chemical composition, it is likely that other degradation mechanisms will be accelerated and the correlation to the outdoor reference scenarios will not apply. Fig. 1 shows the materials to be tested under the scope of this guideline. In any case, the indicated correlation to the outdoor reference scenarios can only be considered as an estimate. For some of the 9 tested materials the correlation applied better than for others. The expected uncertainty is 4.4 % (pp) specular reflectance, ρ, at a wavelength, λ, of 660 nm, an incidence angle, θi, of 15° and an acceptance angle, φ, of 12.5 mrad to simulate 3 years of exposure on the desert and coastal sites. For the “extreme desert” site the expected uncertainty is considerably higher because of the strong dependence on specific abrasion effects on site. The simulation of 10 years of exposure is based on extrapolation of the available outdoor data after 3 years.

Item URL in elib:https://elib.dlr.de/108338/
Document Type:Monograph (Other)
Title:Guidelines Accelerated Aging Testing of Aluminum Reflectors for Concentrated Solar Power
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sutter, FlorianFlorian.Sutter (at) dlr.deUNSPECIFIED
Wette, JohannesJohannes.Wette (at) dlr.deUNSPECIFIED
Fernandez-Garcia, Aranzazuarantxa.fernandez (at) psa.esUNSPECIFIED
Ziegler, StefanalanodUNSPECIFIED
Dasbach, R.AlmecoUNSPECIFIED
Date:August 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:guideline, aluminum reflectors, accelerated aging
Institution:SolarPACE Conference
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Impact of Desert Environment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:05 Dec 2016 14:30
Last Modified:31 Jul 2019 20:05

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