An Optical System for the Quantitative Study of Particulate Contamination on Solar Collector Surfaces

Biryukov, S.; Faiman, D.; Goldfeld, A.

doi:10.1016/s0038-092x(99)00020-1

Cited by 32 publications

(13 citation statements)

References 6 publications

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“…The effect of dirt was established as a reduction in the energy output of 5%. Biryukov et al (1999) conducted different experiments to study the effect of dust accumulation in a solar collector. The first experiment tried to correlate the loss of electrical efficiency and the dust coverage and its distribution on the collector area by using a CCD camera.…”

Section: Solar Thermal Systemsmentioning

confidence: 99%

“…Several studies have been performed in order to quantify soiling loss in photovoltaic (PV) and thermal solar concentrator systems (Becker et al, 1996;Haeberlin and Graf, 1998;Hottel and Woertz, 1942;Biryukov et al, 1999;Garg, 1974;Deffenbaugh et al, 1986;Hammond et al, 1997;Hegazy, 2001;Elminir et al, 2006;Stone et al, 2004). Numerous factors are involved in soiling, including location, climate and collector orientation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of soiling in CPV systems

et al. 2010

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The effect of soiling in flat PV modules has been already studied, causing a reduction of the electrical output of 4% on average. For CPV's, as far as soiling produces light scattering at the optical collector surface, the scattered rays should be definitively lost because they cannot be focused onto the receivers again. While the theoretical study becomes difficult because soiling is variable at different sites, it becomes easier to begin the monitoring of the real field performance of concentrators and then raise the following question: how much does the soiling affect to PV concentrators in comparison with flat panels?' The answers allow to predict the PV concentrator electrical performance and to establish a pattern of cleaning frequency. Some experiments have been conducted at the IES-UPM and CSES-ANU sites, consisting in linear reflective concentration systems, a point focus refractive concentrator and a flat module. All the systems have been measured when soiled and then after cleaning, achieving different increases of 7 S c-I n general, results show that CPV systems are more sensitive to soiling than flat panels, accumulating losses in 7 S c of about 14% on average in three different tests conducted at IES-UPM and CSES-ANU test sites in Madrid (Spain) and Canberra (Australia). Some concentrators can reach losses up to 26% when the system is soiled for 4 months of exposure.

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Section: Solar Thermal Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of soiling in CPV systems

et al. 2010

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“…They concluded that the results depend on many factors, such as the main components of the dust, the size of dust particles and dust deposition density. We can see in a computerized microscope system that has been developed for studying the physics of dust particles, which adhere to the surface of solar collectors and photovoltaic modules. The device enables investigators to calculate the particle size distribution of dust and the fraction of surface area covered by dust.…”

Section: Introductionmentioning

confidence: 99%

Losses produced by soiling in the incoming radiation to photovoltaic modules

Zorrilla-Casanova

Piliougine

Carretero

et al. 2012

Progress in Photovoltaics

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The accumulation of dust on the surface of a photovoltaic module decreases the radiation reaching the solar cell and produces losses in the generated power. Dust not only reduces the incoming radiation on the solar cell but also changes the dependence on the angle of incidence of such radiation. This work presents the results of a study carried out at the University of Malaga to quantify radiation losses caused by soiling on the surface of photovoltaic modules. Our results show that the mean of the daily irradiation losses in a year caused by dust deposited on the surface of a photovoltaic module is around 4%. After long periods without rain, daily irradiation losses can be higher than 20%. In addition, the irradiance losses are not constant throughout the day, and they are strongly dependent on the angle of incidence and the ratio between diffuse and direct radiations. The irradiance losses as a function of solar time are symmetric with respect to noon, where they reach the minimum value. We also propose a simple theoretical model that describes the qualitative behaviour of the irradiance losses during the day. This model takes into account the percentage of dirty surface and the diffuse/direct irradiance ratio. Copyright © 2012 John Wiley & Sons, Ltd.

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“…They concluded that the results depend on m any factors like the principal dust material, the size of dust particles and dust deposition density. We can see in [6] a co mputerized microscope system that has been developed for studying the physics of dust particles, which adhere to the surface of solar collectors and photovoltaic modules. The device enables investigators to calculate the particle size distribution of dust and the fraction of surface area covered by dust.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dust Losses in Photovoltaic Modules

Zorrilla-Casanova¹,

Philiougine²,

Carretero³

et al. 2011

Linköping Electronic Conference Proceedings

139

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The accumulation of dust on the surface of a photovoltaic module decreases the radiation reaching the solar cell and produces losses in the generated power. Dust not only reduces the radiation on the solar cell, but also changes the dependence on the angle of incidence of such radiation. This work presents the results of a study carried out at the University of Malaga to quantify losses caused by the accumulation of dust on the surface of photovoltaic modules. Our results show that the mean of the daily energy loss along a year caused by dust deposited on the surface of the PV module is around 4.4%. In long periods without rain, daily energy losses can be higher than 20%. In addition, the irradiance losses are not constant throughout the day and are strongly dependent on the sunlight incident angle and the ratio between diffuse and direct radiations. When studied as a function of solar time, the irradiance losses are symmetric with respect noon, where they reach the minimum value. We also propose a simple theoretical model that, taking into account the percentage of dirty surface and the diffuse/direct radiation ratio, accounts for the qualitative behavior of the irradiance losses during the day.

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An Optical System for the Quantitative Study of Particulate Contamination on Solar Collector Surfaces

Cited by 32 publications

References 6 publications

Effect of soiling in CPV systems

Effect of soiling in CPV systems

Losses produced by soiling in the incoming radiation to photovoltaic modules

Analysis of Dust Losses in Photovoltaic Modules

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