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Accueil du site → Doctorat → Royaume-Uni → 1993 → A new correlation for light transmittance due to sand dust particles accumulation on photovoltaic panels and its application for Kuwait

University of Reading (1993)

A new correlation for light transmittance due to sand dust particles accumulation on photovoltaic panels and its application for Kuwait

Hasan, A.Y.A

Titre : A new correlation for light transmittance due to sand dust particles accumulation on photovoltaic panels and its application for Kuwait

Auteur : Hasan, A.Y.A

Université de soutenance : University of Reading

Grade : Doctor of Philosophy (PhD) 1993

Résumé
The need for photovoltaic systems to generate electricity is increasing since the early development of solar technology. Much of this need is in rural and arid areas where the photovoltaic modules are exposed to many environmental problems. Sand dust is a major problem in arid areas, where the surfaces of the photovoltaic modules accumulate sand dust. This accumulation affects and degrades the performance of the photovoltaic panels which leads to a difficulty in predicting the performance of any photovoltaic system once it is applied in real-world conditions. Some efforts have been carried out to evaluate this effect and found a major degradation in photovoltaic performance with respect to number of days, weeks, or months that photovoltaic modules are exposed to sand dust. Some works have suggested a fixed value for dirt factor such as 0.99 for the effect of dirt on the transmittance of glazing, but this factor is not sufficient for the problem of sand dust particles accumulation as the performance of photovoltaic modules degrades much higher. None of the work done before has correlated the transmittance of light with the amount of sand dust accumulated over the modules surfaces. It is the purpose of this work to investigate mathematically and experimentally the effect of sand dust amount on beam and diffuse light transmittance once they reach the photovoltaic module glazing surface. A new correlation has been found in this work to help any photovoltaic system designer to predict the real amount of beam, diffuse and global solar radiation that would reach the surface of the modules as a function of sand dust particles size and amount accumulated on them when they are used in dusty areas. On the other hand, this work will improve the predictive capability of existing solar energy simulation models by incorporating the factors which account for sand dust accumulation on photovoltaic surfaces.

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