RSS 1.0Artigos - Energia - FEG
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Treatment of sugarcane vinasse from cachaça production for the obtainment of Candida utilis CCT 3469 biomass
; Canettieri, Eliana Vieira
; ; ; (Biochemical Engineering Journal, 2019) [Artigo]
Ethanol and “Cachaça” production processes generate considerable amounts of residues known as vinasse. The indiscriminate disposal of this waste represents a potential risk to both surface water and groundwater, soil, ... -
Comparative 2D and 3D analysis on the hydrodynamics behaviour during biomass gasification in a pilot-scale fluidized bed reactor
; ; ; ; ; ; Silveira, José Luz (Renewable Energy, 2019) [Artigo]
2D and 3D simulations were carried out to predict the whole gasification process behaviour in a pilot-scale bubbling fluidized bed reactor. Special concern for the complex hydrodynamics phenomena within the fluidized bed ... -
Evolution of carbon capture and storage by mineral carbonation: Data analysis and relevance of the theme
Galina, Natália Ribeiro; Arce, Gretta L.A.F. ; Ávila, Ivonete (Minerals Engineering, 2019) [Resenha]
Mineral carbonation has enormous potential for carbon capture and storage (CCS). CO2 is a greenhouse gas that can be converted into environmentally stable products through mineral carbonation, which has been pointed out ... -
Machine learning methods applied to drilling rate of penetration prediction and optimization - A review
Barbosa, Luís Felipe F.M.; ; Mathias, Mauro Hugo ; de Carvalho, João Andrade (Journal of Petroleum Science and Engineering, 2019) [Artigo]
Drilling wells in challenging oil/gas environments implies in large capital expenditure on wellbore's construction. In order to optimize the drilling related operation, real-time decisions making have been put in place, ... -
Characterization of the flame front inversion of Ethanol–Air deflagrations inside A closed tube
; ; ; Silva, Lucas M.; ; de Carvalho, João A. (Energy, 2019) [Artigo]
Ethanol–air deflagrations were experimentally studied inside a closed tube by varying the equivalence ratio (0.9–1.4) and the initial pressure (20–60 kPa). The flame front inversion phenomenon was observed in all tests. ... -
Energy, exergy, advanced exergy and economic analyses of hybrid polymer electrolyte membrane (PEM) fuel cell and photovoltaic cells to produce hydrogen and electricity
; ; ; ; Silveira, José Luz (Journal of Cleaner Production, 2019) [Artigo]
Hydrogen, as a clean fuel, can provide all the requirements and characteristics of a clean and reliable energy carrier in the long term as a suitable alternative to fossil fuels. In this paper, a power generation system ... -
Thermodynamic study of syngas combustion in gas microturbines with regeneration composed with metallic and ceramic materials
Amaro, Jordan; ; de Carvalho, João A. (Applied Thermal Engineering, 2019) [Artigo]
The objective of this research is to carry out an energetic evaluation of syngas combustion in gas microturbines with regenerators made with two different types of material: metallic or ceramic. A modified chemical equilibrium ... -
Electricity sector in the Galapagos Islands: Current status, renewable sources, and hybrid power generation system proposal
Llerena-Pizarro, Omar R.; Micena, Raul Pereira ; Tuna, Celso Eduardo ; Silveira, José Luz (Renewable and Sustainable Energy Reviews, 2019) [Resenha]
The electricity sector in the Galapagos Islands is heavily dependent on fossil fuels for electricity generation but only a few renewable sources are used for such a purpose in this archipelago. Therefore, this work aims ... -
CO2, CO, hydrocarbon gases and PM2.5 emissions on dry season by deforestation fires in the Brazilian Amazonia
Amaral, Simone Simões; Costa, Maria Angélica Martins ; ; ; ; ; ; Carvalho, João Andrade de (Environmental Pollution, 2019) [Artigo]
Estimation of emissions in the Amazon deforestation fires, which represent one of the main sources of GHG in Brazil. -
Fuzzy logic and hospital admission due to respiratory diseases using estimated values by mathematical model
Vieira, Luciana Cristina Pompeo Ferreira da Silva; Rizol, Paloma Maria da Silva Rocha ; Nascimento, Luiz Fernando Costa (Ciencia e Saude Coletiva, 2019) [Artigo]
Hospitalizations due to respiratory diseases generate financial costs for the Health System in addition to social costs. Objective of this study was to develop and validate a fuzzy linguistic model for prediction of ... -
Geometrical characteristics of sugarcane bagasse for being used as fuel in fluidized bed technologies
; ; ; Antunes, Julio Santana; Tuna, Celso Eduardo ; Silveira, Jose Luz (Renewable Energy, 2019) [Artigo]
Sugarcane bagasse is used as energy source in the sugar cane industry. An appropriate characterization of their physical and morphological properties is vitally important for their use in the gasification and combustion ... -
Temporal evaluation of soil chemical attributes after slash-and-burn agriculture in the Western Brazilian Amazon
; ; ; ; Carvalho Junior, Joao Andrade de; (Acta Scientiarum-agronomy, 2019) [Artigo]
In Amazonia, the main causes of deforestation are systems based on slash-and-burn agriculture. The objective of this work was to evaluate temporal changes in the soil chemical attributes after the vegetation has been slashed ... -
Resilience evaluation of the environmental control and life support system of a spacecraft for deep space travel
Matelli, José Alexandre; (Acta Astronautica, 2018) [Artigo]
In deep space manned travels, the crew life will be totally dependent on the environment control and life support system of the spacecraft. A life-support system for manned missions is a set of technologies to regenerate ... -
Energy, exergy and environmental analyses of hydrogen production process by ethanol steam reforming incorporated to sugar and alcohol mill
; Silveira, José Luz (International Journal of Exergy, 2018) [Artigo]
This work aims to perform the thermodynamic, economic, and ecological studies of incorporation of hydrogen production process by ethanol steam reforming considering data from a sugar and alcohol mill, which produces near ... -
Direct ethanol fuel cell as aircraft APU: a study for onboard waste heat recovery
; Matelli, José Alexandre (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2018) [Artigo]
An advanced concept of jet aircraft (known as “more electric aircraft”) available nowadays requires electrically driven systems. In this scenario, application of low-temperature fuel cells in aircraft is an interesting ... -
Modeling of syngas composition obtained from fluidized bed gasifiers using Kuhn–Tucker multipliers
Amaro, Jordan; Mendiburu, Andrés Z. ; Ávila, Ivonete (Energy, 2018) [Artigo]
This work aims to develop a modified chemical equilibrium model to accurately determine the syngas (synthesis gas) composition obtained from fluidized bed gasifiers. In order to do so, an optimization method was applied ... -
Dynamic analysis of an ethanol steam reformer for hydrogen production
; ; ; Silveira, Jose Luz (2017 IEEE 3rd Colombian Conference on Automatic Control, CCAC 2017 - Conference Proceedings, 2018) [Trabalho apresentado em evento]
The attempt to improve hydrogen quality has motivated research focused solely on the design of reactors for hydrogen production, paying little interest to their modelling and much less attention to its dynamic analysis. ... -
Effect of different parameters on mixture formation and flow field in simulations of an evaporative spray injection test case
Dias Ribeiro, Mateus; Bimbato, Alex Mendonça ; Zanardi, Maurício Araújo ; Balestieri, José Antônio Perrella (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2018) [Artigo]
Direct injection plays an important role in the efforts to increase efficiency of modern engines, and the correct evaluation of the velocity and fuel mixture fraction fields is crucial for modeling combustion in fuel sprays. ... -
Conceptual design of cogeneration plants under a resilient design perspective: Resilience metrics and case study
Matelli, José Alexandre; (Applied Energy, 2018) [Artigo]
The conceptual design phase is the first step in the design process of an engineering system. Most engineering systems, including cogeneration plants, may and likely will experience some malfunctions during its life cycle. ... -
Heat recovery of dedusting systems in electric arc furnaces: concept of a bottoming cogeneration plant and techno-economic analysis
e Silva, Cesar Augusto Arezo; Matelli, José Alexandre (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2018) [Artigo]
Steelworks require large amount of energy in reduction, fusion and refining processes. A mini-mill is a steelwork that produces steel by melting scrap metal, pig iron and metallic elements in electric arc furnaces. Depending ...