Renewable Energies
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Mathematical Modeling of the Transesterification Reaction by Finite Elements: Optimization of Kinetic Parameters Using the Simplex Sequential Method
The use of biodiesel as fuel has been presented as a viable alternative in the search for renewable energies. It can be produced from the transesterification reaction of vegetable oils with methanol in the presence of sodium or potassium hydroxide as catalysts. In the present research, the transesterification reaction of soybean oil was modeled considering t
J. Braz. Chem. Soc.. Publicado em: 2020-02
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2. Characterization of new selective coatings, made of granite and chrome, for solar collectors
ABSTRACT The depletion of fossil fuel reserves and climate change caused by atmospheric pollution has led the human being to seek alternatives that are less damaging to the environment. The concern and the awareness of the population open space for the study of renewable energies to be deepened, among them the best use of solar energy. The use of alternative
Matéria (Rio J.). Publicado em: 10/06/2019
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3. Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces
The search for the reduction of costs for the implementation of renewable energies implies in the optimization of the parameters of the manufacturing processes of consolidated technologies. Among these technologies are the solar collectors composed of absorber films characterized by high absorption in the spectrum range corresponding to solar radiation and l
Mat. Res.. Publicado em: 25/02/2019
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4. Proposal for a Monitoring and Dispatch System for Distributed Micro-Generation of Renewable Energy in Virtual Energy Centers
ABSTRACT The creation and updating of ANEEL (National Electricity Regulatory Agency) regulatory resolution on distributed generation provided a new business environment for the electricity sector, as well as enabling consumers to generate energy. In this context, distributed microgeneration plants management is a challenge, mainly for electric power distribu
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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5. Novos surfactantes alquil poliglicosídicos à base de amilose extraída da batata inglesa (Solanum tuberosum L.)
Alkyl polyglycosides (APGs) are new biodegradable surfactants, non-toxic, synthesized from abundant renewable sources, potentially more appropriate than anionic surfactants. A range of glycosides denoted APG-Cy was synthesized by the Köenig-Knorr reaction using C10, C16 and C18 alcohols and derived from the degradation of amylose from English potato. The mo
Quím. Nova. Publicado em: 2017-04
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6. Otimização e dinâmica dos fluidos computacional aplicadas a turbinas eólicas
The present work consists in the application of optimization methods and computational fluid dynamics to wind turbines. The massive growth in renewable energies demands more powerful turbines and more accuracy in their design and analysis. This work has three objectives: optimization of an airfoil for wind turbines, simulation of a wind turbine airfoil in de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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7. Conversores de alto ganho de tensÃo e estÃgio Ãnico aplicados à sistemas de energias renovÃveis com baterias / High voltage gain and single stage converters applied to renewable energies using batteries
Este trabalho tem por objetivo apresentar um novo conceito para a concepÃÃo de conversores para aplicaÃÃes em energias renovÃveis e carregamento de baterias com um nÃmero reduzido de estÃgios de processamento. SÃo desenvolvidas trÃs topologias diferentes de conversores de alto ganho de tensÃo com um Ãnico estÃgio de processamento e capaz de opera
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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8. O problema da (in) sustentabilidade do desenvolvimento centrado na suinocultura na Microrregião de Chapecó: elementos para a discussão de um novo modelo de desenvolvimento regional
To treat the environment considering the ways and the resources exploration models, is one of the principal commitments that man has when he thinks in developing a productive activity. Being like this, the accomplished study concentrates in describing informations that can bring subjects related to the development of pig breeding in the West of Santa Catarin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/05/2010
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9. Estudo do Desempenho de uma Torre de RecuperaÃÃo de Calor com Canais SintÃticos de Poliuretano para um Dessalinizador Solar TÃrmico / Performance study of a heat recovery tower with synthetic (polyurethane) flow channels to operate in a solar desalination unit
Because of the lack of drinkable water in various semi-arid regions and the necessary use of renewable energies, the present work presents a performance study of a heat recovery tower to operate in a solar desalination unit for decentralized water production. The solar desalination unit has two parts: a heating unit and a desalination unit.This work presents
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010
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10. Desenvolvimento TeÃrico-Experimental de um Modelo de Turbina Tesla Aplicado à GeraÃÃo de Energia Descentralizada por Fontes RenovÃveis / Theoretical and Experimental Development of a Tesla Turbine Model Applied to Decentralized Generation through Renewable Sources
A presente dissertaÃÃo de mestrado trata do desenvolvimento teÃrico-experimental de um novo modelo da Turbina Tesla, tambÃm conhecida como turbina de discos, em que o foco da pesquisa foi estudar esse dispositivo de propulsÃo visando sua aplicaÃÃo em sistemas de geraÃÃo de energia distribuÃda a partir de fontes renovÃveis de biomassa. Um protÃtip
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2009
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11. Análise política, econômica e ambiental da nova política energética européia: um enfoque sobre a indústria brasileira de bioetanol.
This paper provides an analysis of the political, environmental and economic implications of the new European energy policy for the Brazilian bioethanol industry. It begins with a description of the new European legal framework as it pertains to the biofuel industry as well the current developments in this sector of the European market. It provides an estima
Publicado em: 2009
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12. A proteção do meio ambiente sobre a perspectiva das fontes alternativas de energia
A presente dissertação pretende demonstrar que o meio ambiente é um bem difuso pertencente a uma pluralidade indeterminada de sujeitos, indivisíveis em relação aos seus titulares e cuja defesa incumbe tanto ao Poder Público quanto a coletividade. Desta forma, quando nos preocupamos com o consumo consciente da energia, no caso presente das fontes alter
Publicado em: 2008