Documentação de convênios
URI permanente desta comunidadehttps://rigalileo.itegam.org.br/handle/123456789/173
Trabalhos ténico-científico oriundos de convênios com universidades para oferta de turmas de mestrado e doutorados no Estado do Amazonas
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Resultados da Pesquisa
Item Fluidized bed combustion of sawdust pellets(INSTITUTO DE TECNOLOGIA, 2015) MATIAUDA, Mario; BENÍTEZ, Juan B. de León; FREAZA, Nora; RIVERO, Marta.; Jandecy Cabral LeiteThe study investigates the combustion of sawdust pellets in a fluidized bed, aiming at the energy recovery of solid waste in bioethanol production. Samples of pine and palo blanco were analyzed, focusing on the devolatilization stage and primary fragmentation. Results showed significant differences in thermal behavior and fragmentation between the species, with pine exhibiting less fragmentation and more consistent residues. The theoretical model used predicted devolatilization times, validated experimentally, highlighting the influence of bed temperature and particle diameter.Item Desenvolvimento de um Modelo Matemático para a Avaliação da Eficiência da Combustão em Usinas Termoelétricas Operando com Gás e Alternando com Diesel(INSTITUTO DE TECNOLOGIA, 2015) AZEVEDO, Manoel S. Santos; LEITE, Jandecy Cabral; CARVAJAL, Tirso Lorenzo Reyes; RODRIGUEZ, Jorge Laureano Moya; RICO, Iván Leandro Rodriguez; DÍAZ, Pablo Romélio Roque; GOMES, Paulo Cezar Rocha.; Prof Dr. Walter Barra JuniorThe article presents a mathematical model developed to evaluate combustion efficiency in thermoelectric power plants operating with natural gas (NG) and alternating with diesel (HFO). The study was conducted in a plant transitioning to dual-fuel use, aiming to optimize energy efficiency and reduce pollutant emissions. The model covers stoichiometric, thermodynamic, and kinetic aspects of combustion, implemented in software for real-time analysis. Results demonstrated the model's feasibility in predicting engine performance and optimizing specific fuel consumption, with practical applications in plant operation.Item ANÁLISE E IDENTIFICAÇÃO DO MODELO DINÂMICO DO PROCESSO DE COMBUSTÃO EM UM CALCINADOR INDUSTRIAL(Instituto de Tecnologia, 2015) COSTA, Daniella dos Santos Ferreira; SILVA, Orlando FonsecaThis work was developed at Hydro Alunorte's alumina refinery in Barcarena — PA, specifically in the calcination area. Calcination is the process by which all the free water or combined hydrate (Al₂O₃·3H₂O) is eliminated, forming aluminum oxide or simply alumina (Al₂O₃). This reaction requires heating in the combustion chamber with controlled temperature around 1000ºC, located within the stationary fluidized bed calciners. Inside the furnace, a combustion reaction takes place with HFO (Heavy Fuel Oil) as fuel and atmospheric air, which is captured via blowers. The main objective of this work is to identify a representative mathematical model for the combustion process that happens inside the furnace, to further optimize it, thus increasing the energy efficiency of the calciner oven.Item Melhoria na Arquitetura do Sistema de Controle de Combustão de uma Caldeira Modelo DZ-SD na Refinaria da Hydro Alunorte(Instituto de Tecnologia, 2015) SOUSA JUNIOR, Juvenal Farias de; COSTA JUNIOR, Carlos Tavares daThis work presents a proposal to modify the furnace pressure control system in the DZ boiler at Hydro Alunorte refinery, aiming to solve instability problems during load variations. The implementation of the feedforward control strategy resulted in greater operational stability, increased boiler response speed, and the restoration of automatic operation of the combustion system and oxygen control. The results showed significant improvements in boiler performance and the reliability of the steam generation system.