http://repositorio.ufgd.edu.br/jspui/handle/prefix/2062 2026-08-15T02:21:37Z 2026-08-15T02:21:37Z Alves, Pedro Henrique Castro http://repositorio.ufgd.edu.br/jspui/handle/prefix/6872 2026-08-13T05:11:10Z 2026-07-01T00:00:00Z

Título: Análise modal e caracterização hidroeletromecânica de uma bancada experimental com bombas funcionando como turbinas Autor(es): Alves, Pedro Henrique Castro Primeiro Orientador: Moreira Junior, Orlando Abstract: This work presents the improvement and experimental validation of a modular test bench for the study of Pumps as Turbines (PATs) coupled to a three-phase synchronous alternator, aimed at the laboratory simulation of small-scale hydrogenerator systems. The research included the physical reorganization of the components, the definition of the mechanical coupling system, the assembly of the hydraulic circuit, the instrumentation of the test bench, and the dynamic validation of the structure through experimental modal analysis and operational vibration assessment. Three PATs were tested, corresponding to the INI 40-250, INI 40-200, and INI 32-200 models, hydraulically driven by a pump operating as a pump in a closed circuit. The tests were carried out under no-load conditions, without an electrical load connected to the alternator, allowing the measurement of flow rate, inletpressure, average flow velocity, rotational speed of the PAT-alternator set, and no-load terminal voltage. From these data, the total hydraulic head, available hydraulic power, estimated electrical frequency, and complementary performance indicators were calculated. The results showed that the INI 40-200 presented the best compatibility with the nominal condition of the alternator, reaching 1844 rpm, 226 V under no-load operation, and an estimated electrical frequency of 61.47 Hz. The INI 32-200 reached 1606 rpm and the highest calculated hydraulic head, while the INI 40-250 reached 1440 rpm, remaining farther from the nominal rotational speed. The maximum available hydraulic powers were approximately 1.73 kW, 1.69 kW, and 1.55 kW for the INI 40-200, INI 32-200, and INI 40-250 PATs, respectively. Based on these powers and hypothetical global efficiencies, a preliminary possible electrical power range between approximately 0.45 kW and 1.00 kW was estimated, with a reference value of 0.87 kW for the INI 40-200. Since no direct torque measurement or operation with electrical load was performed, the efficiency, effective mechanical power, and useful electrical power were not experimentally determined. There fore, the estimates of mechanical power, torque, and electrical power were treated only through sensitivity analysis using assumed efficiencies. It is concluded that the test bench was validated as an experimental platform for the comparative characterization of PATs under no-load operation, allowing the identification of hydraulic and electromechanical limitations of the set and indicating the INI 40-200 as the most promising alternative for future tests with electrical load. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso

2026-07-01T00:00:00Z Rossi, Weslen Felipe Magri http://repositorio.ufgd.edu.br/jspui/handle/prefix/6784 2026-01-21T04:06:28Z 2025-12-10T00:00:00Z

Título: Análise das estratégias de controle de temperatura em uma estufa de secagem Autor(es): Rossi, Weslen Felipe Magri Primeiro Orientador: Gibelli, Gerson Bessa Abstract: This work presents the development and simulation-based evaluation of control strategies applied to a laboratory drying oven whose original commercial controller became non operational. The thermal dynamics of the system were experimentally characterized, allowing the identification of a First Order Plus Dead Time (FOPDT) model capable of representing the oven’s heating behavior under disturbances and variations in power. Based on this model, a Proportional–Integral (PI) controller was designed using Internal Model Control (IMC) tuning rules, and a static feedforward action was incorporated to anticipate the steady-state power required to reach a given temperature setpoint. The performance of the PI+FF strategy was compared with the traditional On-Off control in multiple operating conditions, including different temperature setpoints and abrupt drops in temperature simulating door opening. The results show that the PI+FF controller eliminates oscillations, improves transient response, enhances temperature accuracy, and achieves higher energy efficiency for low and medium thermal loads. In contrast, the On-Off approach exhibited substantial oscillations, potential actuator stress due to frequent switching, and limited capability to maintain high temperatures with stability. The findings indicate that physical implementation of the PI+FF controller is a feasible and effective solution to restore and improve the oven’s operation, offering a robust alternative for high-inertia thermal processes. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso

2025-12-10T00:00:00Z Oliveira , Tábata Penalva Luque http://repositorio.ufgd.edu.br/jspui/handle/prefix/6766 2026-01-16T04:03:52Z 2025-12-05T00:00:00Z

Título: Análise dos harmônicos em um motor de indução trifásico com o analisador de qualidade de energia Autor(es): Oliveira , Tábata Penalva Luque Primeiro Orientador: Gibelli , Gerson Bessa Abstract: This study aims to analyze the behavior of a Three-Phase Induction Motor (TPIM) using a power supply for the starting process and a power quality analyzer to monitor electrical current and voltage. The obtained data were compared with the performance characteristics provided in the motor catalog. The main focus of the analysis was to identify the presence of harmonics in the currents and voltages when different loads were applied to the motor shaft, evaluating their implications for power quality and system performance. The results were analyzed based on the limits established by the IEEE Std 519-2022 and IEC 61000-3-2 standards, which address harmonic distortion in voltage and current. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso

2025-12-05T00:00:00Z Ramos, Tábata Mirela Ribeiro http://repositorio.ufgd.edu.br/jspui/handle/prefix/6753 2026-01-14T04:13:20Z 2025-12-12T00:00:00Z

Título: Análise energética e luminotécnica em quadra poliesportiva: proposta de modernização com led de alta eficiência na UFGD Autor(es): Ramos, Tábata Mirela Ribeiro Primeiro Orientador: Lima, Aureo Cezar Abstract: The quality of lighting in sports environments is essential to ensure safety, visual comfort, and adequate conditions of use. The multi-sports court of UFGD – Unit II recently underwent a modernization with the replacement of metallic vapor luminaires with LED luminaires, which motivated the need to evaluate the lighting performance of the new system. This work aimed to analyze the illuminance, uniformity and energy efficiency of the court's lighting system after the renovation, comparing measurements performed in the field with simulations in the DIALux software and verifying compliance with ABNT NBR ISO/CIE 8995-1:2013. The study included the physical survey of the environment, the execution of measurements with lux meters, the digital modeling of the lighting system, the proposal of adjustments in the positioning and quantity of the existing luminaires and the evaluation of an alternative modernization with luminaires of greater luminous efficiency. The results showed that, although the illuminance has increased in relation to the previous system, it still does not meet the norm. The simulations indicated that the repositioning and installation of three luminaires guarantee compliance with the standard, but with low luminous efficacy, and that a modernized alternative provides better performance with lower energy consumption. The economic analysis demonstrated the feasibility of the proposal, which presented, for retrofit, a payback of 6.21 years, an Internal Rate of Return (IRR) of 27.20% and a Net Present Value (NPV) of R$ 18,719.65. It is concluded that lighting interventions should be carried out using simulation as a design tool in order to provide an efficient system, ensuring visual performance and energy efficiency for sports areas. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso

2025-12-12T00:00:00Z