Wind Load
Mostrando 25-36 de 46 artigos, teses e dissertações.
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25. Influência da arborização de pastagens no sistema solo-planta-animal. / Influence of tree planting in pastures on the soil-plant-animal system.
The purpose of this study was to evaluate influence of four leguminous trees species in the production, quality of the grass Brachiaria brizantha cv. Marandu, soil fauna, the microclimate, and the animal behavior in pastures cultivated in a consortium tree-grass system, comparing areas with scattered trees and a single grass pasture. The experiments were con
Publicado em: 2008
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26. Space-temporal variability of chlorophyll-a concentration and sea surface temperature estimated from satellite in the Brazilian Southeast Continental Margin / Variabilidade espaço-temporal da concentração de clorofila-a e temperatura da superfície do mar estimadas por satélite na Margem Continental Sudeste Brasileira
The objective of this work was to analyze the space-temporal variability of the chlorophyll-a concentration (Chl) and the sea surface temperature (SST) in the Brazilian Southeast Continental Margin (BSCM), between jan/1998 and dec/2006. Images from SeaWiFS e AVHRR were used for the extraction of the Chl and SST data respectively. Besides, Southeast Oscillati
Publicado em: 2008
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27. USO DE GERADORES EÓLICOS DE PEQUENO PORTE PARA IRRIGAÇÃO NO SEMI-ÁRIDO DO ESTADO DE SERGIPE. / USE OF WIND GENERATORS SMALL FOR IRRIGATION IN SEMI-ARID STATE SERGIPE.
The renewable sources of energies are shown as an interesting alternative to minimize the problem of the electric power lack faced by the rural man, mainly in the remote places where the difficulties of distribution of the electrification lines, above all in the economical aspect, they are big being shown unviable. The energy eolic besides other purposes, ca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2007
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28. Controlador supervisório inteligente para sistemas híbridos eólico-diesel-bateria de pequeno porte. / An intelligent supervisory controller for wind-diesel-battery systems.
This work presents the development and simulation results of an Intelligent Supervisory Controller for hybrid power systems. The controller uses artificial intelligence techniques, based on artificial neural networks and neuro-fuzzy logic, to forecast both wind power and load, and to take optimal dispatch decisions for hybrid power systems. The main controll
Publicado em: 2007
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29. Controlador de carregamento de baterias para turbinas eÃlicas de pequeno porte
Electric energy is considered noblest of the forms of currently available secondary energy. It is difficult to imagine modern society without the advent of the electric energy and the ease and comfort it has brought. The technological advances that humanity has made throughout time have greatly contributed to the control and use of electric energy. In the el
Publicado em: 2007
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30. Modelagem numérica da camada limite atmosférica com validação experimental
This work presents the modeling of the atmospheric boundary layer to get the wind speed and wind direction profile over a complex terrain. The study of the atmospheric boundary layer is very important for the power lines project, determination of power cables insulating chain oscillation, power line limit load project and study of atmosphere pollutant disper
Publicado em: 2007
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31. Generated voltage variation and permanent magnet magnetic condition analysis. / Análise da variação da tensão gerada e do estado de magnetização em um gerador com ímãs permanentes.
Aiming to analyze the performance of a permanent magnet generator, operating under variable load and quantifying the corresponding condition of its magnets, we have developed a prototype adaptable to wind generators. As one of the purposes of this work is to study the magnetic performance of the permanent magnets in several points of load, we have chosen fer
Publicado em: 2007
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32. Analysis of guyed metallic towers under wind load / Análise de torres metálicas estaiadas submetidas à ação do vento / Analysis of guyed metallic towers under wind load / Análise de torres metálicas estaiadas submetidas à ação do vento
Este trabalho faz parte de uma pesquisa onde o objetivo é o desenvolvimento de um estudo numérico envolvendo estruturas de torres metálicas estaiadas de seção transversal quadrada, utilizadas para sistemas de telecomunicações, submetidas às ações estática e dinâmica do vento. Os procedimentos adotados para a determinação das forças estáticas
Publicado em: 2007
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33. Surface fire spread model based on lumped parameter approach / Modelo de propagação de fogo em incêndios de superfície baseado no método nodal
This work presents a new approach for a surface re spread model applicable to wildland re modelling. The mathematical method used in the modeling is the lumped parameter approach. In this method the thermal domain is divided in a nite number of volumes, supposed isothermal and with homogeneous properties, called nodes. To each node are attributed a temperatu
Publicado em: 2007
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34. Controle de vibrações em edifícios submetidos à ação de cargas dinâmicas utilizando amortecedor de massa sintonizando na forma de pêndulo / Vibration control of structures subjected to dynamic loads using tuned pendulum-shaped mass dampers
The ongoing progress of structural analyses and dimensioning, in addition to the continuous advancements in building techniques and material, has made it possible to build taller and more slender structures every day. These structures are also more vulnerable to excessive vibrations caused by dynamic loads like earthquakes, winds, waves, intense traffic, and
Publicado em: 2007
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35. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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36. PROJETO E IMPLEMENTAÇÃO DE UM CONTROLE MODULAR HCC PARA INTEGRAÇÃO DE FONTES ALTERNATIVAS DE ENERGIA / DESIGN AND IMPLEMENTATION OF A MODULAR HCC CONTROLLER TO INTEGRATE ALTERNATIVE SOURCES OF ENERGY
The experience of electric energy shortage in 2001 demonstrated that our dependence almost exclusively on hydroelectricity could fetch great problems to Brazil. Thus being, the existence of trustworthy alternatives of energy must exist, at the very least, as a reserve. For this reason, the perspective of decentralizing the energy production as a form of prom
Publicado em: 2006