Cost Of Electric Power
Mostrando 13-24 de 83 artigos, teses e dissertações.
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13. Thermodynamic analysis of gas turbine cycle using inlet air cooling methods
This work focuses on a comparative analysis among three compressor inlet air cooling techniques using a thermodynamic approach to simulate the gas turbine cycle. Firstly, a Base Case is tested to determine the gas turbine performance without any cooling method. The effect of site altitude on the power output gas turbine even without any cooling technique is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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14. 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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15. Identificação dos fatores críticos da colheita mecanizada de cana-de-açúcar (Saccharum spp.) / The identification of the critical factors of sugarcane (Saccharum spp.) mechanized harvesting
The sugar cane has significant role on Brazilian agribusiness economy. Its sub products are used for electric power generation, fuel production, as raw material for food and chemical industry. On sugarcane production, harvesting is considered as one of the most important operations of the process for it has to attend the raw material demanded by the sugar mi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/10/2011
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16. Estimador de variações de tensão de curta duração em sistemas elétricos de potência utilizando estratégias evolutivas. / Estimate short duration voltage variation using evolutionary strategies.
A methodology is herein proposed to estimate Short Duration Voltage Variation (SDVV) in electric power systems, caused by electrical faults. To attain this target, values recorded by measurement equipment in specific sites are used. In fact, there are few power quality meters installed in power networks, due to the high cost of such meters. Although these co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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17. APROVEITAMENTO DE FONTES ALTERNATIVAS PARA REDUÇÃO DO CONSUMO DE ENERGIA ELÉTRICA E REFLEXOS NOS SEUS CUSTOS / UTILIZATION OF ALTERNATIVE SOURCES FOR REDUCING POWER CONSUMPTION AND ITS CONSEQUENCES IN COSTS
Residential consumption accounts for around one third of total energy consumed in Brazil. The electric shower is the main component of this consumption, along with air conditioning. Hence, much research has been conducted in order to reduce the consumption of this sector and the use of alternative energy sources. Among these include mainly solar and geotherm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/09/2011
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18. Estudo do comportamento elétrico de lâmpadas fluorescentes / Study of the electric behavior of fluorescent lamps
This work presents a broad study of the electrical behavior of compact fluorescent lamps. It includes an analysis of the lamp components and the circuit of the reactor; an analysis of the stability on the operating point of the lamp; a study of static and dynamic characteristics; a development of a mathematical model; simulations and experiments. It is also
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011
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19. 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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20. UTILIZAÇÃO DA METODOLOGIA AHP PARA ALOCAÇÃO DE EQUIPAMENTOS TELECOMANDADOS EM SISTEMAS DE DISTRIBUIÇÃO PARA MELHORIA DA CONFIABILIDADE / USE FOR AHP METHODOLOGY FOR ALLOCATION OF REMOTELYCONTROLLED DEVICES IN POWER DISTRIBUTION SYSTEMS FOR INCREASE RELIABILITY
In power utilities the subject reliability is a permanent worry. In this new context, some solutions have been developed and researched to an alternative to improve the performance on service restoration when there are consumers without power supply. Among possible solutions the installation of remotely-controlled switches represents a solution that has been
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2010
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21. Aspectos contábeis do Tratado de Itaipu : análise das práticas de avaliação dos ativos imobilizados da empresa Itaipu Binacional
In the seventies of the twentieth century, there was an expansion in the production of electricity in Brazil. On April 26, 1973 the Itaipu Treaty was concluded between Brazil and Paraguay which enabled the construction of a hydroelectric plant in the border between the two countries: the Itaipu Binacional, which is governed by the Itaipu Treaty and its Annex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2010
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22. Usuários de habitação de interesse social e adoção de sistemas de aquecimento solar de água - estudo de caso em Londrina-PR
This research is dedicated to investigate the reasons why the solar water heating systems are not used in large scale on low-income housing in Brazil. There is a global tendency to reduce dependence on fossil energy resources, however, the influence and economic ruling of oligopolies that holds the end-use traditional energy costs demonstrate the vulnerabili
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2010
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23. New concept of space radiator with variable emittance
A new concept of space radiator of variable emittance for satellite thermal control is presented. The radiator is composed of two stages which exchange heat through radiation between finned surfaces covered with variable emittance coatings, whose emissivity is increased with temperature. Under cold conditions the radiative heat coupling between the stages is
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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24. Dimensionamento ótimo de sistemas híbridos, com geração fotovoltaica e célula a combustível, para atendimento a comunidades isoladas na Amazônia / Optimal design of a hybrid photovoltaic and fuel cell power generation system, to supply isolated communities in the Brazilian Amazon.
The lack of electricity in isolated communities in the Brazilian Amazon has become one of the greatest barriers for the development of the region. Currently, the main technologies that provide electricity to these communities are diesel generators, batteries and dry cells. These non-renewable energy sources may pose serious problems to the environment and hu
Publicado em: 2010