Особливості опромінення двосторонніх фотопанелей

Abstract

A method for calculating the irradiance of double-sided solar photo panels has been developed. In particular, the method makes it possible to assess the irradiation of the surfaces on the back side of the panel at different spatial orientations. The system of equations describing the irradiation includes ratios for determining solar radiation on the territory of Ukraine for a horizontal surface and the coefficients for recalculating irradiation from a horizontal to an inclined surface, taking into account the peculiarities of their spatial orientation under direct irradiation and irradiation with reflected scattered light. Analytical studies of the irradiation intensity of solar panels have been carried out for conditions that differ in azimuthal direction and angle of inclination. The features of the irradiation of the front and back sides of solar panels are shown. The possibilities of forming rational conditions for the spatial orientation of panels by the factor of two-sided irradiation are considered. The directions of the panel along the "south-north" and "east-west" axes are considered as characteristic calculated ones. The angles of inclination adopted for the analysis (90 and 45 degrees) allow assessing the irradiance of the panel in the most used range of real operating conditions. With a decrease in the angle of inclination, starting from the level of 90 °, the total irradiation of the panel increases. However, the vertical position (90°) can be dictated by the conditions of its application, for example, for a fence or facade cladding. The features of the irradiation of the front and rear parts of solar panels are shown and rational conditions for the spatial orientation of the panels are proposed. The greatest effect of the two-sided irradiation of the solar panel can be obtained with the "east-west" orientation. At the same time, for all orientations, the use of a double-sided photo panel is positive. The angle of inclination has the greatest influence on the irradiance of the panel when the orientation is "south-north", with the orientation "east-west" the dependence on the value of the angle is practically insignificant. The use of the proposed method and the results of the analysis carried out on its basis makes it possible to choose a rational architecture of a solar power plant.