2025-07-222025-07-222025-02-07TRINDADE, Rafael Pinheiro. Simulação do uso de bombas com velocidade variável em processos de saneamento. Orientador: Manoel José dos Santos Sena. 2025. 68 f. Dissertação ( Mestrado Profissional em Engenharia Sanitária e Ambiental) - Programa de Pós-Graduação em Engenharia Sanitária e Ambiental, Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2025. Disponível em: https://repositorio.ufpa.br/jspui/handle/2011/17608. Acesso em:.https://repositorio.ufpa.br/jspui/handle/2011/17608The pursuit of energy efficiency and sustainability in sanitation systems motivated this study, which investigated the use of variable-speed centrifugal pumps (VSCPs) in water supply, sewage systems, and urban drainage processes. The main objective was to develop a computational tool to simulate the behavior of these pumps under different operational conditions, comparing their performance with constant-speed pumps (CSPs). The methodology included mathematical modeling based on hydrodynamic similarity laws and the implementation of a C++ algorithm, validated through comparison with reference data. Twenty one scenarios were analyzed, varying the initial flow rate (Qₘ) from 200 to 800 m³/h and the flow variation amplitude (Aq) from 20 to 60 m³/h, over 24-hour periods. Results demonstrated that VSCPs are significantly more efficient at low flow rates (Qₘ ≤ 400 m³/h), achieving energy savings between 19% and 43%. However, at higher flow rates (Qₘ ≥ 500 m³/h), variable-speed operation became less advantageous, resulting in increased energy consumption (up to 154% in extreme cases). The reduction in power consumption at low-speed regimes, combined with the flexibility to adjust flow rates without throttling losses, justifies the adoption of VSCPs in systems with fluctuating demands. It was concluded that variable-speed technology is feasible for energy optimization in specific contexts, particularly in sanitation applications with moderate demand variations. The developed tool enables the analysis of real-world scenarios, supporting technical decision-making and education in sanitary and environmental engineering.Acesso AbertoAttribution-NonCommercial-ShareAlike 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-sa/3.0/br/Bombas hidráulicaVelocidade variávelSaneamentoSimulação computacionalEficiência energéticaLaboratório virtualHydraulic pumpVariable speedSanitationComputational simulationEnergy efficiencyDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO BASICOPLANEJAMENTO, MONITORAMENTO, OPERAÇÃO E CONTROLE DE SISTEMAS DE SANEAMENTOPLANEJAMENTO, PROJETOS E INFRAESTRUTURAS HIDRÁULICAS DE SANEAMENTOHIDRÁULICA E SANEAMENTO