Towards the prediction of CSP mirrors wear: Methodology of analysis of influencing parameters on the mirrors surface degradation: Application in two different sites in Morocco

Abstract During their operation in Concentrated Solar Power plants (CSP), solar reflectors are exposed to harsh climatic conditions which cause their degradation. Surface damage caused by direct impact or by mechanical contact cleaning is among phenomena that decrease the optical performance of solar mirrors. This degradation is directly related to the exposure site properties. Up to now, no standardized mechanical durability standard exists related to the site exposure conditions. The originality of the present study is to find out which geological and climatic parameters are influencing the surface wear rate of the solar mirrors and to define an approach to determine these parameters on each potential implantation site. This approach was applied on two sites in Morocco with more than 500 km between them: a desert site and a seaside site. The aim of this work is to identify the influencing parameters on the surface damage phenomenon. Additional studies are ongoing in this direction to define a criterion to evaluate how external conditions of an implantation site can affect the surface damage of solar mirrors and to define the weighting of the parameters to get a “level of surface damage” of each potential site. By analyzing the exposure conditions impact on mirror’s surface damage, the sustainability of the solar reflectors can be determined. The present study can also help the investors to optimize the performance of the solar power plant by choosing the appropriate technology and materials for each implementation site.

[1]  S. Biryukov,et al.  Degradation of optical properties of solar collectors due to the ambient dust deposition as a function of particle size , 1996 .

[2]  Marta Vivar,et al.  Effect of soiling in CPV systems , 2010 .

[3]  E. P. Roth,et al.  The Effect of Natural Soiling and Cleaning on the Size Distribution of Particles Deposited on Glass Mirrors , 1980 .

[4]  M. S. El-Shobokshy,et al.  Degradation of photovoltaic cell performance due to dust deposition on to its surface , 1993 .

[5]  Said Bouzid,et al.  Effect of impact angle on glass surfaces eroded by sand blasting , 2000 .

[6]  Simonine C Caron.  Accelerated aging of thick glass second surface silvered reflectors under sandstorm conditions , 2011 .

[7]  G. P. Tilly,et al.  Sand erosion of metals and plastics: A brief review , 1969 .

[8]  Rohit Pillai,et al.  Impact of dust on solar photovoltaic (PV) performance: Research status, challenges and recommendations , 2010 .

[9]  Niels Nielsen.  R. A. Bagnold: »The Physics of Blown Sand and Desert Dunes« Methuen & Co., London, 1954. 265 sider. 16 billeder og 84 dia grammer. 22X14,5 cm. Pris: 30 sh. , 1954 .

[10]  R. B. Pettit,et al.  Wavelength dependent scattering caused by dust accumulation on solar mirrors , 1980 .

[11]  Lawrence L. Kazmerski,et al.  A comprehensive review of the impact of dust on the use of solar energy: History, investigations, results, literature, and mitigation approaches , 2013 .

[12]  R. A. Zakhidov,et al.  Investigation of abrasive action of atmospheric particles on the reflectance of mirrors , 1980 .

[13]  R. Bagnold,et al.  The Physics of Blown Sand and Desert Dunes , 1941 .

[14]  W. C. Krumbein.  Measurement and geological significance of shape and roundness of sedimentary particles , 1941 .

[15]  Paul Comley,et al.  A Comparison of Polymer Film and Glass Collectors for Concentrating Solar Power , 2014 .

[16]  I. Finnie.  Erosion of surfaces by solid particles , 1960 .

[17]  David Faiman,et al.  AN OPTICAL SYSTEM FOR THE QUANTITATIVE STUDY OF PARTICULATE CONTAMINATION ON SOLAR COLLECTOR SURFACES , 1999 .

[18]  C. E. Kennedy,et al.  Optical Durability of Candidate Solar Reflectors , 2005 .

[19]  Virginia L. Morris.  Cleaning agents and techniques for concentrating solar collectors , 1980 .

[20]  Yaping Shao,et al.  A review on East Asian dust storm climate, modelling and monitoring , 2006 .

[21]  Lianyou Liu,et al.  An Experimental Method for Analyzing Environmental Effects of Blowing Sands on Glass Abrasion , 2010 .

[22]  S. Bouzid,et al.  Effects of sandblasting on the efficiencies of solar panels , 2000 .

[23]  M. M. Beheary,et al.  Effect of dust on the transparent cover of solar collectors , 2006 .

[24]  A. Ibrahim,et al.  Effect of Shadow and Dust on the Performance of Silicon Solar Cell , 2011 .