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Avaliação do desempenho dos métodos de proteção contra a perda de excitação em geradores síncronos: uma contribuição para a melhoria da técnica baseada em combinações de sinais
(Universidade Federal de Santa Maria, 2019-07-19)
This work aims to evaluate the behavior of synchronous generators against total (TLOE)
and partial (PLOE) loss of excitation, to demonstrate the behavior of the main electrical variables
involved, to analyze the performance, ...
Compostagem de lodo de uma estação de tratamento de efluentes sanitários
(Universidade Federal de Santa Maria, 2018-09-28)
Due to the development of environmental technologies, sewage and effluent treatment has become increasingly efficient in the removal of pollutants. As a result, loads of xenobiotics are removed from the wastewater. In ...
Avaliação da acessibilidade espacial no Parque João Goulart, Santa Rosa, RS
(Universidade Federal de Santa Maria, 2019-08-19)
People with disabilities and reduced mobility, beyond the medical and individual perspective, associate themselves to a structural and social perspective, where the interaction environment has a huge impact on the experience ...
Circuito para monitoramento e restabelecimento da tensão elétrica em células a combustível tipo PEM usando curtos-circuitos controlados
(Universidade Federal de Santa Maria, 2019-03-31)
Electricity generation from renewable sources can contribute significantly to mitigate the impacts that non-renewable sources have on nature. Of these, hydrogen power generation is of great interest and can be easily ...
Estudo de concretos com pozolanas submetidos à carbonatação em ensaios acelerado e natural monitorado por 20 anos
(Universidade Federal de Santa Maria, 2019-09-02)
Carbonation, a potentially aggressive chemical reaction to concrete, is a slow process and difficult to detect in the short term through accelerated testing. In this work were studied concretes with fly ash (CV) and rice ...
Contribuição ao controle sensorless de motores síncronos de ímãs permanentes
(Universidade Federal de Santa Maria, 2019-12-05)
This thesis presents contributions to sensorless control for permanent magnet synchronous
motors. A maximum torque per ampere strategy is used to generate the current
control reference in synchronous reference frame. ...
Impactos das atividades antrópicas na qualidade da água da bacia hidrográfica do rio Vacacaí Mirim – RS
(Universidade Federal de Santa Maria, 2019-08-02)
This study was carried out to analyze the impacts of anthropogenic activities on the water quality of the Vacacaí Mirim river basin, located in the municipality of Santa Maria - RS, which is a tributary of the dam (or ...
Análise de viabilidade técnica e econômica de um sistema solar fotovoltaico Grid-Tie em uma empresa de pequeno porte do setor metal-mecânico
(Universidade Federal de Santa Maria, 2018-12-14)
Renewable energy is important in the current context of electricity production, marked
by the search for renewable and increasingly clean sources of energy. The most used renewable
sources, especially solar photovoltaic, ...
Ferramenta computacional para auxiliar na redução de custos com energia elétrica
(Universidade Federal de Santa Maria, 2019-08-30)
Finding alternatives to reduce electricity costs is important, even more so if they are available on a single platform, and can be analyzed separately or together, quickly and practically, indicating accurate results. This ...
Estudo de viabilidade econômica e socioambiental do etanol super-hidratado como combustível para mobilidade e geração de energia
(Universidade Federal de Santa Maria, 2019-03-11)
Fossil fuels (gasoline and diesel) are largely used as primary energy source for mobility and stationary power generation. Meanwhile, their use has a negative impact on Greenhouse Gas (GHG) emission, and maintains the ...