Avaliação prévia do impacto do albedo e outros parâmetros na geração de energia em uma UFV com módulos bifaciais

Abstract

The impact of the albedo factor and other design parameters are evaluated and estimated in the UFV Três Marias GD, which has, among its constructive characteristics, the use of bifacial photovoltaic modules. For this, the constructive parameters of the photovoltaic plant, such as albedo factor, shading, tilt and height of the modules and distance between rows, and methods of calculating the irradiation on the back face of the modules are studied to estimate the impacts on energy production. Bifacial modules began to be studied in the late 1970s and early 1980s with the aim of increasing generation efficiency in a smaller area by taking advantage of the reflection of solar beams on the ground or walls. The albedo is the most relevant parameter to increase the irradiation in the back face of the bifacial modules. By effectively changing the reflectivity of the soil, it is possible to achieve gains between 8 and 20%. The most studied method for energy estimation for bifacial modules is the view factor that considers the shading of the module itself and the position of the sun throughout the year. The PVSyst software employs this method and it was used to estimate energy and evaluate the sensitivity of the plant's constructive parameters, Where gains of up to 8,75% were obtained. A spreadsheet was prepared in this work, also based on the view factor, compared with the PVSyst and with the real data for the months of May and June 2022 from the UFV Três Marias GD, obtaining diferences of up to 24,32%.