Electric Energy Generating
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Integrated project of a smart microgrid allied with energy management: An initiative to reduce electrical energy costs
Abstract Electricity is undoubtedly one of the most important resources in the modern world. As the demand for electric energy increases, conventional resources that are transformed into electric energy are being exhausted, generating a need to search for alternative sources, resulting in a significant increase in energy costs. This study presents an integra
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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2. Contribuição dos Sistemas Fotovoltaicos Conectados à Rede Elétrica para a Redução de CO2 no Estado do Ceará
Resumo A questão energética tem um significado relevante no contexto da busca do desenvolvimento sustentável, sendo condição essencial para encontrar caminhos alternativos para substituir o uso de combustíveis fósseis. O estado do Ceará possui potencial para o uso de energias renováveis, especialmente a eólica e solar. Este artigo tem como objetivo
Rev. bras. meteorol.. Publicado em: 21/10/2019
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3. DEVELOPMENT OF INSULATING MAGNETIC OIL FOR TRANSFORMERS
The Centrais Elétricas do Norte do Brasil AS – Eletronorte, as well as other companies in the world energy sector, have problems of loss of the performance by excessive heat and even accidents with their transformers. The maintenance and accidents impact of energy supply, generating profit and more expensive insurance premiums. The transformers are essent
Publicado em: 20/07/2014
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4. Desafios e oportunidades da geração eólica e termelétrica a gás natural no Sistema Elétrico Peruano. / Challenges and opportunities of the wind generation and to natural gas thermal in the Peruvian Electricity System.
Several countries around the world have increasingly sought to diversify their electrical matrix in order to reduce dependence on fossil fuels and reduce emissions of gases responsible for worsening greenhouse effect in the atmosphere. As a result, has grown the participation of some renewable energy sources that until two decades ago did not occupied a prom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012
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5. A fuzzy/Bayesian approach for the time series change point detection problem
This paper addresses the change point detection problem in time series. A methodology based on the Metropolis-Hastings algorithm applied to time series modeled as a process with Beta distribution is discussed. In order to make this methodology useful in practice, a fuzzy cluster technique is applied to the initial time series at first, generating a new data
Pesquisa Operacional. Publicado em: 2011-08
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6. Modelo computacional de cortes para otimizar o potencial de geração de usinas hidrelétricas / Computacional model of cuts to optimize the potential to generate hydro power plants
The repowering of hydro power plants increases their generating capacity by improving the structure or changing equipment. It is a low cost alternative to improve the generation capacity comparing with the building of new plants. Repowering by changing the hydro-turbines is the focus of this work. By doing that, the efficiency of the energy generation proces
Publicado em: 2011
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7. THE USE OF BIO-DIGESTERS IN SMALL AND MEDIUM RURAL PROPERTIES WITH EMPHASIS ON VALUE ADDING: A CASE STUDY FROM NORTHWESTERN REGION OF RIO GRANDE DO SUL STATE / O USO DE BIODIGESTORES EM PEQUENAS E MÉDIAS PROPRIEDADES RURAIS COM ÊNFASE NA AGREGAÇÃO DE VALOR: UM ESTUDO DE CASO DA REGIÃO NOROESTE DO RIO GRANDE DO SUL
From the duration of the Kyoto Protocol, there has been a renewed interest in technology of bio-digesters. As they allow a reduction in the emission of greenhouse gases compared to other waste treatment methods, their deployment can permit the marketing of carbon credits, resulting in money. The present study aims to analyze the process of dissemination of t
Publicado em: 2010
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8. INTEGRAÇÃO DE PILHAS DE CÉLULAS A COMBUSTÍVEL COM OUTRAS FONTES ALTERNATIVAS DE ENERGIA / INTEGRATION OF FUEL CELLS STACKS WITH OTHER ALTERNATIVE SOURCES OF ENERGY
This dissertation presents a project of a integrated system with distinct energy generating modules using a wind generator, photovoltaic generator, fuel cells stack (FCs) and an accumulator of energy formed by a bank of batteries. This system was implemented in the Center of Studies in Energy and Environment-CEEMA-UFSM. The alternative sources of energy were
Publicado em: 2009
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9. USE OF EXPANDERS FOR GENERATING ELECTRICAL ENERGY IN NATURAL GAS PRESSURE REDUCTION STATIONS / USO DE EXPANSORES PARA GERAÇÃO DE ENERGIA ELÉTRICA EM ESTAÇÕES DE REDUÇÃO DE PRESSÃO DE GÁS NATURAL
The natural gas is compressed to high pressures in order to be transported in the gas pipeline and delivered to the clients at lower pressures, using pressure reduction control valves in an adiabatic process. It can be shown that the same natural gas thermodynamic output state is achieved if the control valves can be substituted by expanders, producing work
Publicado em: 2009
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10. Um estudo comparativo da eficiÃncia das usinas hidrelÃtricas do Brasil, utilizando a anÃlise por envoltÃria de dados â DEA / A comparative study of the efficiency of the brazilian hydroelectric units, using the Data Envelopment Analysis â DEA.
The recent structural modifications that occurred in the electric brazilian sector had, in its essence, as main purpose to guarantee a reliable energy supply. But, how to guarantee the energy supply without sufficient financial resources to invest in the construction of new electric generation plants, necessary to supply of the energy front to the expansion
Publicado em: 2008
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11. Estudo da influência das variações de temperatura e umidade no comportamento da demanda de energia elétrica e formação do custo marginal de operação no Brasil. / Study of the influence of variations in temperature and humidity in the behaviour of the demand for electricity and formation of the marginal cost of operation in Brazil.
This thesis aims at the elaboration of a study regarding the interference of changes in temperature and relative humidity in the behavior of the demand for electric power and formation of the Marginal Cost of Operation (CMO) in Brazil. From the search for understanding of the steps involved in Operation Planning and Programming of Operation Daily, to meet th
Publicado em: 2008
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12. Uso do óleo vegetal em motor estacionário de ciclo diesel / Vegetable oil use in stationary engine of diesel cycle
In terms of liquid biofuels, the questions related to alcohol are in a developed level with the creation of a productive chain where all the processes are technologically decided since the production of the sugar cane until the alcohol consumption with the development of the multifuel cars. As for the use of vegetable oils, some barriers must be overcome, ma
Publicado em: 2008