Effect of a Thermal Nonlinear Absorption Coefficient on the Dynamics of a Photovoltaic Panel

Abstract

In this article, we propose a theoretical study of the effect of a thermal nonlinear absorption coefficient on the dynamics of a photovoltaic (PV) panel. This coefficient is expressed as a quadratic function of temperature of a PV module known as active zone of a PV panel. Based on the energy balance at each layer of a PV panel, the mathematical expressions of the temperature on each layer are derived. A comparative study of the thermal behavior of a PV panel for a constant and nonlinear coefficient is made, thanks to the numerical investigations carried out in the MATLAB environment. We reveal that, this nonlinear absorption coefficient induces the cooling of a PV panel as a whole, and optimize the electrical efficiency of a PV panel around 2.5%.

Keywords: Nonlinear absorption coefficient, recombination process, electrical efficiency, diffusion process, PV panel.

DOI: 10.7176/JETP/10-6-02

Publication date:October 31^st 2020