RSS 1.0Artigos - Energia - FEG
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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 ... -
Conceptual design of biomass-fired cogeneration plant through a knowledge-based system
Matelli, José Alexandre (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2016) [Artigo]
Industries such as sugar/ethanol and paper/pulp generate large amount of biomass as by-products that must be properly handled to avoid environmental damage. A synergetic alternative to address this issue is to use the ... -
DDT limits of ethanol–air in an obstacles-filled tube
(Combustion Science and Technology, 2018) [Artigo]Experiments were performed to study flame acceleration and deflagration-to-detonation transition (DDT) in ethanol–air mixtures in a tube filled with orifice plates with a blockage ratio of 0.44. Tests were conducted at ... -
Comparative study on combustion and oxy-fuel combustion environments using mixtures of coal with sugarcane bagasse and biomass sorghum bagasse by the thermogravimetric analysis
(Journal of the Energy Institute, 2018) [Artigo]Biomass and coal have different physicochemical properties and thermal behavior. During the co-combustion of coal-biomass mixtures, their thermal behavior varies according to the percentage of each fuel in the mixture. ... -
Physicochemical and thermal characteristics of sugarcane straw and its cellulignin
Canettieri, Eliana Vieira; ; ; ; da Silva, Debora Danielle Virgínio ; Dussán, Kelly Johana ; ; de Carvalho, João Andrade (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2018) [Artigo]
Combustion of biomass is considered to be a source of atmospheric pollution and, therefore, is one of the important sources of CO2 emission. This paper discusses the burning of sugarcane straw and its cellulignin in ... -
Robust multi-objective optimization of a renewable based hybrid power system
Roberts, Justo José; Marotta Cassula, Agnelo ; ; ; Mendiburu, Andrés Z. (Applied Energy, 2018) [Artigo]
This paper proposes a probabilistic simulation-based multi-objective optimization approach for dimensioning robust renewable based Hybrid Power Systems. The method integrates an Optimization Module based on a multi-objective ... -
Prediction of the minimum fluidization velocity of particles of sugarcane bagasse
Pérez, Nestor Proenza; ; Machin, Einara Blanco ; Antunes, Julio Santana ; Verdú Ramos, Ricardo Alan ; Silveira, Jose Luz (Biomass and Bioenergy, 2018) [Artigo]
This study refers to an experimental analysis of the fluid-dynamics of particles of sugarcane bagasse in a fluidization column with an internal diameter of 190 mm, which determined the minimum fluidization velocity of the ... -
CO2 sequestration by pH-swing mineral carbonation based on HCl/NH4OH system using iron-rich lizardite 1T
Arce Ferrufino, Gretta Larisa Aurora; ; ; de Carvalho, João Andrade ; Avila, I. ; Romero Luna, Carlos Manuel ; (Journal of CO2 Utilization, 2018) [Artigo]
In pH-swing mineral carbonation, several acid/base systems has been investigated. Currently the main acid/base systems employed are HCl/NaOH and NH4HSO4/NH4OH. However, the use of a HCl/NH4OH system was not yet elucidated. ... -
Fluid dynamic study of mixtures of sugarcane bagasse and sand particles: Minimum fluidization velocity
; Pedroso, Daniel Travieso; Machin, Einara Blanco ; Antunes, Julio Santana ; Verdú Ramos, Ricardo Alan ; Silveira, Jose Luz (Biomass and Bioenergy, 2017) [Artigo]
This paper is focused on the study of fluid-dynamic behavior of mixtures of the sugarcane bagasse particles and quartz sand in a transparent fluidized bed column. The minimum fluidization velocity (Vmf) was determined by ... -
Diagrammes entropiques pour des mélanges ammoniac-eau: applications aux systèmes frigorifiques à absorption
; Silveira, Jose Luz; ; Lamas, Wendell de Queiroz ; Araujo, Fernando Henrique Mayworm (International Journal of Refrigeration, 2017) [Artigo]
The objective of this work is to calculate the entropy of ammonia–water mixture as a function of temperature, pressure, concentration, and other thermodynamic properties associated to absorption process, to support energy ... -
A comparative assessment of empirical and lattice Boltzmann method-based drag models for simulation of gas–solid flow hydrodynamics in a bubbling fluidized bed
Luna, Carlos M. Romero; Carrocci, Luis R. ; Arce, Gretta L.A.F. ; Ávila, Ivonete (Particuology, 2017) [Artigo]
In simulations of fluidized beds using computational fluid dynamics (CFD), the description of gas–solid flow hydrodynamics relies on a drag model to account for the momentum transfer between gas and solid phases. Although ... -
Thermal behavior and kinetics assessment of ethanol/gasoline blends during combustion by thermogravimetric analysis
Quiroga, Luis Carlos Rios; Balestieri, Jos� Antonio Perrella ; �vila, Ivonete (Applied Thermal Engineering, 2017) [Artigo]
The use of ethanol as a fuel or as an additive blended with gasoline is very important for most countries, which aim to reduce the heavy dependence on fossil fuels and mitigate greenhouse gases emission. An increased use ... -
Use of a fluidized bed combustor and thermogravimetric analyzer for the study of coal ignition temperature
�vila, Ivonete; ; Luna, Carlos M.R. ; (Applied Thermal Engineering, 2017) [Artigo]
Ignition experiments with two bituminous coals were carried out in an atmospheric bubbling fluidized bed combustor (FBC) and a thermogravimetric analyzer (TGA). In the FBC tests, the rapid increase in O2, CO2, and ...