906 resultados para micro turbine
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Este artigo tem o objetivo de repensar conceitos, conteúdos e objetivos de temáticas ligadas à área de História através da articulação entre o uso de linguagens audiovisuais – no caso, o cinema – o papel da narrativa e a construção de práticas de ensino, todas baseadas nos estudos de micro-história. Desejamos não apenas debater os potenciais pedagógicos e empíricos dos recursos tecnológicos dentro das salas de aula, mas, especialmente, o das possibilidades reais de transformação dos alunos em sujeitos do processo de construção de novos conhecimentos na área, por meio da produção do curta metragem. Essa ferramenta pedagógica e tecnológica pode ajudar-nos a refletir sobre as prerrogativas dos PCN’s que prevem em suas propostas a valorização do local e do cotidiano dos alunos, o respeito à diversidade e pluralidade, o papel dos sujeitos na História. A proposta aqui apresentada é fruto de um projeto realizado na Fundação Educacional de Fernandópolis entre 2009 e 2010, sob a forma de trabalhos de conclusão de curso desenvolvidos por alunos do curso de graduação em História.
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Pós-graduação em Odontologia - FOAR
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Trata-se a presente invenção de um processo para separação de misturas estáveis de óleo vegetal/água, através do processo de filtração tangencial, utilizando como meio filtrante tubos cerâmicos micro-porosos à base de a-alumina - zircónia, mediante Impregnação por Solução Portadora de Zircónio-ISP, com o objetivo de aumentar a retenção da fase óleo de emulsões de óleo vegetal/água e, por conseguinte, contribuir para a solução de problemas relativos à poluição do ambiente aquático e tratamento de águas residuárias provenientes principalmente de processos industriais.
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Pós-graduação em Engenharia Mecânica - FEG
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The objective of the present article is to assess and compare the performance of electricity generation systems integrated with downdraft biomass gasifiers for distributed power generation. A model for estimating the electric power generation of internal combustion engines and gas turbines powered by syngas was developed. First, the model determines the syngas composition and the lower heating value; and second, these data are used to evaluate power generation in Otto, Diesel, and Brayton cycles. Four synthesis gas compositions were tested for gasification with: air; pure oxygen; 60% oxygen with 40% steam; and 60% air with 40% steam. The results show a maximum power ratio of 0.567 kWh/Nm(3) for the gas turbine system, 0.647 kWh/Nm(3) for the compression ignition engine, and 0.775 kWh/Nm(3) for the spark-ignition engine while running on synthesis gas which was produced using pure oxygen as gasification agent. When these three systems run on synthesis gas produced using atmospheric air as gasification agent, the maximum power ratios were 0.274 kWh/Nm(3) for the gas turbine system, 0.302 kWh/Nm(3) for CIE, and 0.282 kWh/Nm(3) for SIE. The relationship between power output and synthesis gas flow variations is presented as is the dependence of efficiency on compression ratios. Since the maximum attainable power ratio of CIE is higher than that of SIE for gasification with air, more research should be performed on utilization of synthesis gas in CIE. (C) 2014 Elsevier Ltd. All rights reserved.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The performance and emissions behavior of a Rover 1S/60 turboshaft engine when operated with several blends of aviation kerosene and ox tallow ethyl-ester are shown in this article. The tests were performed with a compressor shaft coupled to an hydraulic dynamometer where data of power and mass fuel flow were collected to determine the brake specific fuel consumption. A flue gas analyzer was positioned at the exhaust duct to collect oxygen, carbon dioxide, carbon monoxide and nitrous oxides. An increase in the specific fuel consumption was observed due to the lesser lower heating value of the most oxygenated blends. However, reductions of CO, CO2 and NO (x) have been observed and no-significant ill effects have occurred in the turbine operation.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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In this study, the physicochemical characteristics of calcium phosphate based bioactive ceramics of different compositions and blends presenting similar micro/nanoporosity and micrometer scale surface texture were characterized and evaluated in an in vivo model. Prior to the animal experiment, the porosity, surface area, particle size distribution, phase quantification, and dissolution of the materials tested were evaluated. The bone regenerative properties of the materials were evaluated using a rabbit calvaria model. After 2, 4, and 8 weeks, the animals were sacrificed and all samples were subjected to histologic observation and histomorphometric analysis. The material characterization showed that all materials tested presented variation in particle size, porosity and composition with different degrees of HA/TCP/lower stoichiometry phase ratios. Histologically, the calvarial defects presented temporal bone filling suggesting that all material groups were biocompatible and osteoconductive. Among the different materials tested, there were significant differences found in the amount of bone formation as a function of time. At 8 weeks, the micro/nanoporous material presenting similar to 55,TCP:45%,HA composition ratio presented higher amounts of new bone regeneration relative to other blends and a decrease in the amount of soft tissue infiltration. (C) 2014 Elsevier B.V. All rights reserved.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)