Banca de DEFESA: FRANCISCO NOGUEIRA VILAÇA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: FRANCISCO NOGUEIRA VILAÇA
DATA: 10/07/2026
HORA: 09:00
LOCAL: online
TÍTULO:

SIMULATING THE MINIMUM ROTATION SPEED FOR PUMPING STATIONS TO ENSURE THE OPERATING PRESSURE IN CENTER PIVOTS IRRIGATION SYSTEMS

PALAVRAS-CHAVES:

Center Pivot, MDE, VBA, VFD.

PÁGINAS: 50
GRANDE ÁREA: Ciências Agrárias
ÁREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
ESPECIALIDADE: Irrigação e Drenagem
RESUMO:

Center pivot irrigation systems are subject to topographical variations imposed by the terrain, so their design must meet the worst-case scenario. Typically, the pumps used in those systems are centrifugal pumps, whose flow rate and head depend, among other factors, on its rotor rotational speed. Variable Frequency Drive (VFD) is a drive system for electric motors that allows some variation in the shaft rotation speed. Reducing the rotation speed reduces the flow rate and/or head delivered by the pump, which in turn can reduce the energy consumption of the pumping station. For estimating the optimal rotor rotational speed, the path traveled by the lateral line of a center pivot irrigation system was divided into one-degree intervals, and from a Digital Elevation Model (DEM), the elevation of each tower was determined. A procedure in Visual Basic for Applications (VBA) was created to use the data for simulating the minimum motor speed required to guarantee the operating pressure at the pressure regulating valve (PRV) inlet.  EPANET was used to access the results quality, which proved satisfactory, allowing the methodology to be used in real conditions, making it possible to evaluate the possibility of varying the rotation speed of the motor through a VFD, which can reduce its energy consumption.

MEMBROS DA BANCA:
Presidente - ADRIANO VALENTIM DIOTTO (Membro)
Interno - LESSANDRO COLL FARIA (Membro)
Interno - ALBERTO COLOMBO (Suplente)
Interno - VICTOR BUONO DA SILVA BAPTISTA (Membro)
Externo à Instituição - EUSIMIO FELISBINO FRAGA JUNIOR - UFU (Suplente)
Externo à Instituição - MARCELO ROSSI VICENTE - IFNMG (Membro)
Externo à Instituição - JOSÉ HENRIQUE NUNES FLORES - UVM (Membro)