A New PV soiling monitoring device.
Alae AZOUZOUTE1,2, Mostafa CHOUITAR3, Mohammed Garoum2, Abdellatif Ghennioui1
1Institut de Recherche en Energie Solaire et Energies Nouvelles, Rabat, Morocco
/2MEAT, University Mohamed V, EST, Sale, Morocco
/3Lycée Technique Mohammedia, Mohammadia, Morocco

The energy market until now perceives the PV technology as the most commercialized technology in the world. In this regard, many countries in the MENA region have adopted this technology as an alternative source of energy to satisfy their energy needs especially the countries with no oil or gas reserve.  In fact, the most suitable sites for the installation of PV plants are commonly affected with harsh climatic conditions especially those related to the accumulation of dust. Soiling phenomenon or dust deposition is an important factor that affects the optical efficiency of solar PV panel, which consequently affects the electricity production. The main objective of this paper is to introduce a new method to quantify the soiling loss on the surface of a solar PV panel.  To do that, we have used the “Brewster’s angle”. When the incident ray on the surface of the glass is inclined at the Brewster angle a part of this light will be reflected and perfectly polarized. In addition, we will have a total reflection if the incident ray is polarized perpendicularly and inclined at the Brewster angle. The experimental method is about comparing the intensity of the reflected ray at the Brewster angle intercepted from a reference glass surface (clean surface) and the reflected ray from a soiled glass surface (dirty surface). The results show that we have a decrease in the intensity measured after each increase of dust deposition on the surface of the glass sample.

Area: Sub-Area 9.5: Effects of Soiling on PV Systems