Validação de sistemas de bombeamento fotovoltaico autônomo e direto na irrigação

Abstract

The limited electrical grid infrastructure and high fuel costs hinder irrigation pumping, particularly in remote areas. Photovoltaic (PV) water pumping emerges as a promising alternative because it converts solar energy into electricity to power pumps. This research proposes a methodology for recommending the most suitable operational strategy for PV pumping systems directly coupled to drip irrigation. The study evaluates different types of solar pumping equipment and technologies by analyzing performance, optimal sizing, and efficiency improvements. The first article details the validation methodology based on measurements of the pump’s electrical parameters, hydraulic performance, and irrigation uniformity. The second article applies the methodology to compare two PV pumping projects using distinct pumping technologies. The results demonstrate that employing a DC converter increases hydraulic efficiency, operational flexibility, and reliability, and that a pump can still be considered viable for irrigation even when its efficiency does not exceed 30%. Based on the comparison of pump technologies, the methodology indicates that the diaphragm pump is more suitable than the centrifugal pump for drip irrigation with autonomous and directly coupled PV pumping.