Electricity And Heat
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. TRANSIENT MODELLING OF INDUSTRIAL GAS TURBINE FOR POWER GENERATION / MODELAGEM DO REGIME TRANSITÓRIO DE TURBINAS A GÁS INDUSTRIAIS PARA A GERAÇÃO DE ENERGIA ELÉTRICA
Gas turbine engines are a vital part of today¿s industry, providing both work and heat for several industry sectors, from transportation to cogeneration systems. The growing need for reliable electricity has encouraged the design of stationary gas turbines, including in Brazil, which operates on multiple fuels such as diesel, natural gas and low calorific f
Publicado em: 2010
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14. Análise energética e exergética de um sistema de cogeração com motores de combustão interna / Energy and exergy analysis of a cogeneration system using an internal combustion engine
Dentre as alternativas de geração de energia, os sistemas de cogeração provaram ser uma boa opção para a produção de energia distribuída em locais de carga elétrica e térmica coincidente. Estas demandas podem variar numa ampla faixa, o que faz com que os sistemas de cogeração atinjam alto fator de utilização de energia (FUE) em horas de coinci
Publicado em: 2010
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15. Development of ammonia-water absorption refrigeration systems simulator and its application in a project of a system moved by exhaust gases of diesel engine / Aperfeiçoamento de um simulador de sistemas de refrigeração de absorção agua-amonia e sua aplicação para projeto de um sistema movido a gas de escape de motor diesel
This work shows the development of an ammonia-water absorption refrigeration system pre-existing simulation program, which uses diesel engine exhaust gases from a diesel-generator group as energy source. The project was implemented in four stages. An initial design of its components involved solely thermodynamic relations, and was based on the arbitration of
Publicado em: 2008
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16. Aquecimento de água no setor residencial / Residential water heating
The residential sector reflects the culture of the indiscriminate use of electricity water heating. Inclusion of gas and thermosolar energy to the electrical supply system may present advantages as they are more compatible to consumer"s heat transformation processes. In addition these new sources of energy may decrease the electrical and electrothermal syste
Publicado em: 2007
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17. Ritmos biológicos em índios Guarani adultos / Biological rhythms in Guarani adult indians
Communities living in areas without electricity present biological rhythms synchronized by the day/night cycle and social schedules; it seems possible to detect seasonal differences in their behaviour. In urban areas electricity allow us to organize our activities according to our interests. This behaviour has been pointed as a cause for the absence of seaso
Publicado em: 2007
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18. AnÃlise energÃtica experimental e estudo da viabilidade econÃmica de um grupo gerador de 30 kWe A gÃs natural em diferentes nÃveis e tipos de cargas elÃtricas
Due to the lack of investment in the Brazilian electricity sector, together with the increment of the economy, there is a great possibility of new electricity rationing in 2007. This energy shortage imposes that the companies, which do not intend to have a reduction in their production capacity, supply their own electricity. One of the main options is the el
Publicado em: 2005
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19. ANÁLISE DE UM SISTEMA DE PRODUÇÃO SIMULTÂNEA DE ELETRICIDADE, FRIO E CALOR / ANALYSIS OF A SYSTEM FOR THE SIMULTANEOUS PRODUCTION OF ELECTRICAL ENERGY, HEAT AND COLD
The simultaneous production of electric energy, heat and cooling capacity from the primary fuel burning on a heat engine (trigeneration) can emerge as a promising strategy, from the energy and project points of view, mostly, in food and chemistry industries. The present work describes the experimental study of a vapor compression system for chilled water pro
Publicado em: 2005
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20. Avaliação exergética dos efluentes do processo industrial do álcool / Exergetic assessment of effluents in the industrial alcohol process
In the production of ethyl alcohol as a fuel, the sugar and alcohol industry captures large volumes of water for steam generation, for cooling and as part of the process, generating large amounts of effluents. Using the energy produced by the burning of bagasse in the furnace for the transformation of water into steam, the industry generates its own electric
Publicado em: 2005
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21. A Energia Térmica e o Paradoxo da Eficiência Energética: Desafios para um Novo Modelo de Planejamento Energético / The Thermal Energy and the Energy Efficiency Paradox: Challenges for a New Paradigm of Energy Planning
The electrical generation model of Brazil has a peculiar characteristic regarding other countries. Its large hydropower capacity allowed the indiscriminate use of the electricity for several kinds of end uses. However, with the transition of the hydroelectric generation model for a mixed generation model, a new paradigm of energy efficiency appears. The elec
Publicado em: 2004
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22. A cogeraÃÃo como difusÃo de um processo de inovaÃÃo tecnolÃgica e estratÃgica empresarial no setor sucroalcooleiro: o caso da Destilaria Giasa
This Dissertation is a qualitative research with the purpose of exploring and understanding the changes envolving the Destilaria Giasa, considering the diffusion process of a technology innovation in the case of a familiar enterprise inserted in sugar cane industry. In a short definition, cogeneration is a combined heat and power production (CHP), correspond
Publicado em: 2003
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23. Tecnologia solar de interesse social e baixo custo para aquecimento de agua na moradia
Low cost technological solutions are defined here as practices that ally thermal efficiency and low investments for the economical and social context of low income populations. These solutions imply in the use of low cost recyde materials and row materials. The present work analyses solar heat water technologies for Brazilian poor people, faced their energet
Publicado em: 2002
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24. Desenvolvimento e instalação de um cogerador compacto no campus da Universidade Federal do Acre
The use of Diesel engines to generate electricity is an ordinary practice in Brazil, mainly for emergency services in hospitals, industries, shopping centers, telephone centrals, universities, and supermarkets. Besides the emergency uses, there are a large number of thermoelectric systems spread in the country to supply isolated communities. In the North and
Publicado em: 2001