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65 - SIMULAÇÃO NUMÉRICA DO COMPORTAMENTO DE SISTEMAS FOTOVOLTAICOS PARA BOMBEAMENTO HIDRÁULICO

Doi: 10.47094/ICOLUBRAPECI.2026/RS-37

PALAVRAS CHAVE: Fotovoltaico. Modelagem computacional. Irrigação.

KEYWORDS: Photovoltaic. Computational modeling. Irrigation.

ABSTRACT:
The use of photovoltaic (PV) systems in agricultural applications has grown significantly due to the need for renewable energy sources and the desire to reduce operating costs. Integrating solar panels with hydraulic pumps enables autonomous irrigation operations—particularly in regions with high solar incidence—thereby minimizing reliance on grid electricity. This study aims to evaluate the hourly performance of a PV system coupled with a hydraulic pump using computational modeling, taking into account the influence of solar irradiance on flow rate and total dynamic head. To this end, a model was developed in MATLAB R2016a, based on a photovoltaic panel with a rated power of 1.5 kW, a temperature coefficient of -0.004/°C, and a cell temperature of 35°C. The hydraulic system parameters included water density, gravity, pump and motor efficiency, pipe length and diameter, and the friction coefficient. Solar irradiance was simulated using a simplified model for a typical day, ranging from 0 W/m² at night to 1000 W/m² at midday. PV power generation was calculated based on irradiance and the temperature coefficient, while the maximum hourly flow rate was determined by the electrical power required to overcome the total head (static head plus friction losses) of the piping system. The results showed that the pump operates only during hours of peak irradiance, with maximum flow rates occurring around midday. During periods of low irradiance or at night, the flow rate is zero, reflecting the system's direct dependence on available solar power. The total dynamic head varies in proportion to the flow rate, ensuring adequate pressure for localized irrigation systems. Thus, this study demonstrates the feasibility of using photovoltaic systems for hydraulic pumping, highlighting that correctly sizing the pump and panel is essential to meeting daily water demands efficiently and sustainably.

Autores

  • Andréa Dos Guimarães De Carvalho

  • Ricardo Aparecido Santos

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