Outdoor exposure testing of silvered-glass reflectors under marine environment

Guerguer, Mohamed; Naamane, Sanae; Karim, Mounia; Bouaouine, Hassan

doi:10.1063/1.5117666

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The environmental outdoor conditions that can be responsible for a mirror's degradation include the climatic conditions as well as the geological properties (sand particle characteristic properties such as hardness) present in the region [5][6]. Important climatic conditions include high relative humidity at the site, high wind speed in the direction of the exposure, as well as high gradient of temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Important climatic conditions include high relative humidity at the site, high wind speed in the direction of the exposure, as well as high gradient of temperature. High wind speed is generally associated with erosion issues [5]. This degradation phenomenon directly affects the specularity of mirror surfaces by increasing the amount of diffuse reflectivity and therefore reducing the performance of the reflector in operation [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…High wind speed is generally associated with erosion issues [5]. This degradation phenomenon directly affects the specularity of mirror surfaces by increasing the amount of diffuse reflectivity and therefore reducing the performance of the reflector in operation [4][5][6][7]. To evaluate the aggressiveness of a CSP potential site, this paper presents the work conducted to compare the durability of solar mirrors exposed in two different potential installation sites.…”

Section: Introductionmentioning

confidence: 99%

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Durability Assessment of Silvered Glass Mirrors Exposed in Two Different Desert Sites Suitable for CSP Installations

Karim,

Sansom,

King

et al. 2024

SolarPACES Conf Proc

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The durability of thick solar glass mirrors has been evaluated in this study by exposing samples at two potential exposure sites. Samples have been exposed for a period of 18 months at different orientations (North, South, East, and West) to evaluate the impact of orientation on the durability. The samples performance has been evaluated by measuring the specular reflectance of the glass samples before and after an appropriate cleaning process. In addition, the contact angle and the surface energy have been analysed. Obtained results show that mirror durability is very specific to the environmental conditions of the exposure site.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Durability Assessment of Silvered Glass Mirrors Exposed in Two Different Desert Sites Suitable for CSP Installations

Karim,

Sansom,

King

et al. 2024

SolarPACES Conf Proc

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“…The degradation of paint films alters their protective role and causes corrosion of reflective layer and, therefore, decreases the lifetime of solar mirrors. Depending to their application, several factors could influence the durability of paints, such as temperature, solar irradiation, humidity, pollution, and moisture [23,24]. The resistance of paint coatings to environmental stress is usually evaluated in term of changes in physical properties or appearance.…”

Section: Introductionmentioning

confidence: 99%

Chemical Degradation and Color Changes of Paint Protective Coatings Used in Solar Glass Mirrors

et al. 2021

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This paper reports a study of the influence of outdoor natural aging on paint coatings applied to the back of three commercial solar glass mirrors (A1, C2, and D2) under two different exposure environments (marine and desert) in Morocco for a period of about three years. The aging assessment was carried out through colorimetric measurements and FTIR-ATR (Attenuated total reflection-Fourier transform infrared) analyses of the top coat paints. The obtained results demonstrate that the tested coating system had a high resistance at the desert site. Under the desert environment, no obvious changes to the coating occurred after 350 days. However, at the marine site, some color changes were detected, and the coating got yellow and more matte, especially for mirror A1. FTIR-ATR analyses have indicated many modifications in the intensity of many bonds of infrared spectra especially for paint of this mirror type (A1). This chemical degradation is not only due to UV degradation but also related to many factors, such as humidity, salinity, and rainfall. This finding was concluded after the faster degradation observed on samples exposed at the marine site. The present study confirms the need to use different exposure environments for testing the limits of new protective systems for solar glass mirrors rather than using only the real service conditions. Finally, accelerated tests are necessary for understanding the effect of each degrading parameter and their results should be compared to outdoor tests data for a complete analysis of coatings durability.

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Outdoor exposure approach in a harsh environment toward the study of corrosion aspects of primary solar reflectors

et al. 2021

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Outdoor exposure testing of silvered-glass reflectors under marine environment

Cited by 3 publications

References 5 publications

Durability Assessment of Silvered Glass Mirrors Exposed in Two Different Desert Sites Suitable for CSP Installations

Durability Assessment of Silvered Glass Mirrors Exposed in Two Different Desert Sites Suitable for CSP Installations

Chemical Degradation and Color Changes of Paint Protective Coatings Used in Solar Glass Mirrors

Outdoor exposure approach in a harsh environment toward the study of corrosion aspects of primary solar reflectors

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