Performance Estimation of Copper-Free Solar Reflectors

Author:

Atak Eslem EnisORCID,Wiesinger FlorianORCID,Kahraman GülşahORCID,Sánchez-Moreno RichardoORCID,Günay A. AlperenORCID,Baker DerekORCID,Okutucu-Ozyurt TubaORCID

Abstract

Copper (Cu) has been an essential ingredient in the production of silvered-glass reflectors used in the concentrated solar power (CSP) systems. However, due to added material cost and the environmental burden induced by Cu mining, researchers have started to look for ways to develop copper-free coating systems for reflectors used in solar thermal applications. In this study, we employed accelerated aging tests to obtain the aging characteristics of reflectors with and without Cu and exposed reflectors outside for natural aging. Samples were subjected to Copper Accelerated Acetic Acid Salt Spray (CASS), Ultraviolet-Humidity (UVH) and UV tests, and the changes in the hemispherical and specular reflectance were measured and compared.

Funder

Horizon 2020 Framework Programme

Publisher

TIB Open Publishing

Reference10 articles.

1. J. Wette, et al. “Advanced cyclic accelerated aging testing of solar reflector materials,” AIP Conference Proceedings, vol.2126, no.1, AIP Publishing LLC, 2019, doi: https://doi.org/10.1063/1.5117670

2. ISO 9227, Corrosion tests in artificial atmospheres, Salt spray tests, ISO, 2006.

3. ISO 11507, Paints and varnishes – Exposure of coatings to artificial weathering – Exposure to fluorescent UV lamps and water, ISO, 2007.

4. ASTM G173-03 Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface. ASTM International, 2003.

5. SolarPACES Reflectance Guideline: PARAMETERS AND METHOD TO EVALUATE THE REFLECTANCE PROPERTIES OF REFLECTOR MATERIALS FOR CONCENTRATING SOLAR POWER TECHNOLOGY UNDER LABORATORY CONDITIONS, Version 3.1. https://www.solarpaces.org/csp-research-tasks/task-annexes-iea/task-iii-solar-technology-and-advanced-applications/reflectance-measurement-guidelines/ (April, 2020)

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