In this article, we have studied the variation of the electrical performance characteristics of photovoltaic modules under the effect of dust. We have installed four modules of different technologies on the CERER site (Centre for Study and Research on Renewable Energies) for a year without being cleaned and each month we note their characteristics. The four technologies used are mono crystalline, polycrystalline, amorphous and thin film CdTe.
The results showed that dust has more impact on thin film technology with a degradation of 68% of its power and less impact on amorphous which experienced a 29% loss in power.
The thermal transfer in the tow plaster (insulating material) is modeled by numerical method resolution in transient regime. The discretization of the reduced space variable and the reduced temporal variable is applied to the heat equations, the boundary conditions and the initial condition. The expressions of the dimensionless temperature allowed to represent the curves of evolution of the reduced temperature in the reduced time. The time constant characterizing the reduction of the reduced temperature in the material makes it possible to calculate its thermal diffusivity.
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