Hydraulic Power Plants
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. SISTEMATIZAÇÃO DE CONHECIMENTO PARA O PROJETO DE PLATAFORMAS DE COLHEITA DE FEIJÃO / KNOWLEDGE SYSTEMATIZATION FOR THE DESIGN OF HARVEST HEADERS OF BEANS
Due to the need to increase in production and to the high rates of losses in the header because of machines with low efficiency in harvesting, it is presented, in this thesis the knowledge systematization needed to develop new header designs to harvest beans. This work presents the machines used for the harvest of beans, the harvesting systems, and a list of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2011
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2. Proposta de metodologia e de modelo para modernizações de sistemas de automação de unidades geradoras hidráulicas de grande porte. / Propose of methodology and of model for modernizations of automation systems of large hydraulic generating units.
A geração de energia elétrica é importante para todos os ramos de atividades econômicas e tem demanda crescente. Isso implica constantes melhorias dos sistemas secundários, entre eles os sistemas de automação, que evoluíram muito nos últimos anos. Em várias usinas hidrelétricas esses sistemas estão obsoletos e apresentam outros problemas, portan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2011
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3. Technical parameters for the white mold control using air- assisted hydraulic sprayer / Parâmetros técnicos para o controle do mofo-branco na cultura do feijão utilizando pulverizador hidráulico de barra com assistência de ar
The white mold, caused by the fungus Sclerotinia sclerotiorum, is one of the most destructive diseases of the bean plant in the world, especially in crops under conditions of mild temperatures and high soil and air humidity. In general, primary infections caused by this fungus start due to the presence of free water and an exogenous energy source, usually se
Publicado em: 2009
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4. Minimum pressure coefficient criterion applied in axial-flow hydraulic turbines
The recent development of computer-based tools with more efficient algorithms has allowed a substantial improvement in hydraulic turbine design. The definition of an initial geometry capable to assist certain characteristics of turbine performance is a first step for useful numerical turbine analysis. This paper presents an application of the minimum pressur
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-03
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5. Migrações ascendentes de peixes neotropicais e hidrelétricas: proteção a jusante de turbinas e vertedouros e sistemas de transposição. / Upstream migrations of neotropical fishes and hidroelectric dams: protection downstream from turbines and from spillways and fish passages.
This work aims to examine engineering, mainly hydraulic engineering, aspects related to the effects of hydroelectric dams on upstream fish migration, identifying possible measures for the reduction of fish mortality, inside turbines draft tubes and in the region downstream from spillways, and describing the most common upstream fish passages, mainly vertical
Publicado em: 2008
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6. Methodology of prospection and evaluation of pre-viability fast of ditributed generation (DG): eolic and hydraulic case. / Metodologia de prospecção e avaliação de pré-viabilidade expedita de geração distribuída (GD): caso eólico e hidraúlico.
Estudos convencionais de identificacao e de viabilidade de potenciais de producao de energia eletrica eolica e hidroeletrica de pequena escala demandam trabalhos de campo que, muitas vezes, implicam na inviabilidade economica do negocio em funcao dos seus onerosos custos. Alem disso, a execucao desses trabalhos nao assegura ao investidor a recuperacao desses
Publicado em: 2007
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7. "Pré-processador matemático para o código Relap5 utilizando o Microsoft Excel" / MATHEMATIC PREPROCESSOR FOR RELAP5 CODE USING MICROSOFT EXCEL
Computational program are used for thermal hydraulic analysis of accidents and transients conditions in nuclear power plants. The RELAP5 code has been developed to simulate accidents and transients conditions, performing a best estimate analysis, in Pressurized Water Reactors (PWR) and auxiliary systems. The RELAP5 code, which has been used as a tool for lic
Publicado em: 2006
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8. Avaliação de sistemas de reparo para o problema de abrasão do concreto de superfícies úmidas em UHEs
The research field of construction pathology has been steadily growing lately due to natural degradation observed in different structures. In this sense, great attention has been devoted to special concrete structures such as hydroelectric power plants (HPP) because of their complexity and importance, socially as well as economically. One of the pathologies
Publicado em: 2006
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9. Modelo de suporte a decisão para o otimização da operação de sistema de usinas hidroeletricas / A decision support tool for the optimization of the operation of a system of hydro-eletric plants
This dissertation has the objective of build a Decision Support Tool that gives a quick and easy way to analyze all the different alternatives to manage integrated a complex of hydroelectric reservoirs seeking the maximization of the benefits of the complex. The benefits of the complex were defined as the total potential gravitational energy of the hydraulic
Publicado em: 2006
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10. Modelo de suporte a decisão para o otimização da operação de sistema de usinas hidroeletricas / A decision support tool for the optimization of the operation of a system of hydro-eletric plants
This dissertation has the objective of build a Decision Support Tool that gives a quick and easy way to analyze all the different alternatives to manage integrated a complex of hydroelectric reservoirs seeking the maximization of the benefits of the complex. The benefits of the complex were defined as the total potential gravitational energy of the hydraulic
Publicado em: 2006
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11. Verificação da eficácia dos sistemas de vedação e drenagem em fundações de barragens de concreto / Grouting and drainage curtains efficacy verification in concrete dam foundations
One of the biggest problems for hydraulic works safety is the uplift pressure. The execution of grouting, associated with drainage, is very important to control seepage through concrete dam foundations. Therefore, appropriate means to check the efficiency of those systems are essential for dam safety evaluation. Most of the uplift pressure criteria used nowa
Publicado em: 2006
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12. Solving the unit commitment problem of hydropower plants via Lagrangian Relaxation and Sequential Quadratic Programming
We consider the optimal scheduling of hydropower plants in a hydrothermal interconnected system. This problem, of outmost importance for large-scale power systems with a high proportion of hydraulic generation, requires a detailed description of the so-called hydro unit production function. In our model, we relate the amount of generated hydropower to nonlin
Computational & Applied Mathematics. Publicado em: 2005-12