Effect of long term outdoor exposure on anti-soiling coatings for solar reflectors

Wette, Johannes; Sutter, Florian; Buendía-Martínez, Francisco; Fernández-García, Aranzazú

doi:10.1063/5.0028960

Cited by 3 publications

(2 citation statements)

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“…Antireflective coatings reduced the impact of dust to only -0.014 transmittance loss in Spain, while in Morocco, severe dust events resulted in a transmittance loss of 0.05; accelerated aging tests were also conducted and the highest degradation rate was -0.041. Wette et al [177] tested two newly developed anti-soiling coatings during 2 years of exposure in Spain, the coatings were cleaned with pressurized water and a brush; the results suggest that the coatings perform differently and dependently on the cleaning technique: for one type, the pressurized water resulted in a cleanliness gain, for the other type it was vice-versa (poor washability). Yilbas et al [178] presented recently, in 2021, a comprehensive analysis of dust characterization, soiling mechanisms, and dust mitigation by hydrophobic surfaces for solar energy applications.…”

Section: Anti-soiling Coatingsmentioning

confidence: 99%

“…Furthermore, the coatings' anti-soiling effect will be more significant when the soiling is more intense [170]. Coatings can be associated with cleaning methods to enhance the optical performance of the reflectors; however, this association of mitigation approaches must be done dependently on the type of coating, different anti-soiling coatings perform differently for cleaning methods, the wrong association can lead to losses in the mirrors' reflectance instead of restoring it [177].…”

Section: Figmentioning

confidence: 99%

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Dust impact on concentrated solar power: A review

Zereg

Gama

Aksas³

et al. 2021

Environmental Engineering Research

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Many sites with high solar radiation face high dust loads that reduce energy generation by concentrated solar power plants. This review presents the attenuative impacts of atmospheric aerosols, as well as reflectivity losses due to soiling of solar reflectors, by covering both experimental investigations and numerical studies; along with presenting the theoretical background. The chemical nature of aerosols, and the physics of soiling and atmospheric extinction phenomena (scattering and absorption) are also reviewed. Suspended particles like aerosols result in atmospheric extinction of the solar radiation that reaches the concentrators, and the deposition of these particles on the solar reflectors provokes decreases up to 80% in their reflectivity, and thus enhances the cumulus of optical losses and the reduction of energy production. Even though dust affects both CSP and photovoltaics, CSP technologies suffer more losses. The impact of dust should be particularly considered during the planning phase of solar thermal plants, since its consequent reduction in energy output can be severe. While there have been multiple papers to review dust-related problems for PV, the present paper is the first literature review dedicated to the impact of soiling on concentrated solar power.

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Section: Anti-soiling Coatingsmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%