Industrial Electrical Systems
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Electricity generation from the offshore wind energy source. / Geração de energia elétrica a partir da fonte eólica offshore.
In the last decade wind power source was the fastest-growing energy source. Technological learning curves for this sector fall down by a 15% a 20% rate each 3 years. Countries which are committed with wind power are running after the target of 12% wind into the worlds electrical production by 2020. The contribution of the offshore wind power (OWP) source is
Publicado em: 2008
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14. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008
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15. Segurança no trabalho em sistemas elétricos industriais / Safety at work in industrial electrical systems
Este trabalho pretende proporcionar uma visão aplicada à Segurança no trabalho em Sistemas Elétricos Industriais na Região Metropolitana de Campinas. A segunda maior causa de acidente de trabalho no Brasil é com eletricidade, proporcionando um custo muito alto para país, sabendo disto o Ministério do Trabalho revisou a Norma Regulamentadora de númer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/08/2007
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16. Modeling and optimization of piezoelectric shunts apply to passive vibration control / Modelagem numérica e otimização de shunts piezelétricos aplicados ao controle passivo de vibrações
Due to the development of new technologies, industrial structures are now made of lighter materials and work at higher operation speeds producing an increasing vibration and noise level generation. As a result, different techniques of active and passive control have been developed and are continuously being improved. Among the passive control techniques, the
Publicado em: 2007
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17. Comparative study of the performance of fuzzy and conventional controllers applied in a bioprocess / Estudo comparativo do desempenho de controladores fuzzy e convencional aplicados em um bioprocesso
The use of fuzzy controllers in bioprocesses has increased greatly in the last few years. In conventional controllers, assumptions and simplifications are often made to build a precise mathematical model that may be far from the real situation. In contrast, fuzzy controllers are an attractive technique for the control of plants that are ill-defined or non-li
Publicado em: 2007
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18. Correlation between images and electrical signals for determination of bubble diameters in liquids / Correlação entre imagens e sinal elétrico para determinação do diâmetro de bolhas em líquidos
The distribution of bubble sizes is a critical feature in twophase systems. The interfacial area of bubbles is strongly related to chemical reaction and mass transfer rates in industrial applications such as distillation and fermentation columns, biological systems, oxidation, hydrogenation, waste water treatment and in natural processes such as aerosol dy
Publicado em: 2006
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19. Gerenciamento Estratégico de Energia, Estudo de Caso
This work, studies an executive methodology of Industrial Energy Management, in a systemized form, using strategical management tools of processes, method pdca, concept of ¨just in time¨ and administration and management of stock; that they will allow the data handling and quantitative and qualitative informations to be applied, independent and/or totality
Publicado em: 2004
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20. ESTUDO DA FUSÃO E SOLIDIFICAÇÃO DA FASE BI-2212 E SEUS MECANISMOS DE SUPERCONDUÇÃO / STUDY OF BI-2212 PHASE MELTING AND SOLIDIFICATION AND ITS SUPERCONDUCTING MECHANISMS
High temperature superconductivity was discovered in 1986. Since then more than 150 new superconductors (cuprates, bismuthates, borides and fullerite) with critical temperature higher then 23,3K (the highest critical temperature for low temperature superconductors) have been synthesized. Many of them rise interest from the scientific viewpoint and are suitab
Publicado em: 2003
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21. Comparação do desempenho de um sistema de refrigeração para resfriamento de liquido, controlado a diferentes modos de controle. / Comparison of the system performancefor liquid refrigeration, controlled cooling the different ways of control.
A prototype of refrigeration system in a chiller plant was assembled and instrumented for development of a conventional and fuzzy controllers. Fuzzy controls are increasingly being applied to industrial process especially in process with complex mathematical modeling. The capacity of action in a system controlled by a fuzzy logic is based only on a expert kn
Publicado em: 2003
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22. Estudo e implementação de estrategia para minimização de sobretensões produzidas por inversores PWM em sistemas de acionamento de motores eletricos com cabos longos
The analysis of long distance induction motor driving systems is performed. This kind of system, usuaIly driven by a voltage source inverter, has been employed by Petrobras for oi! exploitation in deepwater. Due to the excessive cable length, undesirable effects such as overvoltages and overcurrents are recorded at the motor and the inverter, respectively. P
Publicado em: 2001
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23. UM SISTEMA DE DIAGNÓSTICO DE EQUIPAMENTOS ELÉTRICOS DE ALTA TENSÃO COM BASE NA OCORRÊNCIA DE DESCARGAS PARCIAIS / A DIAGNOSTICS SYSTEM OF HIGH VOLTAGE POWER APPARATUS BASED IN PARTIAL DISCHARGES OCURRENCE
High voltage (HV) power apparatus are fundamental parts in the industrial process. It is also well Known that electrical insulation systems are the parts that present more problems through the life cycle of an HV apparatus. The dielectric properties of materials are altered during operation time and for this reason they should be monitored. Among the main an
Publicado em: 2001
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24. Análise econômica de dois sistemas de descascamento de madeira de eucalipto / Economic analysis of two systems of descascamento of eucalyptus wood
The objective of this work was to analyze the two systems of the eucalyptus wood peeling, utilized by the Brazilian forest companies, with the purpose to identify the most advantageous in the economical point of view. The evaluated systems were the fixed system, composed by a barrel of industrial peeling, and a mobile, composed by an agricultural tractor mod
Publicado em: 2000