Exergy Analysis
Mostrando 1-12 de 24 artigos, teses e dissertações.
-
1. Exergy and emergy: complementary tools for assessing the environmental sustainability use of biosolids generated in wastewater-treatment plant for energy-production
Taking advantage of the energy contained in the biosolids generated in a wastewater treatment plant (WWTP) is one of the processes of greatest interest due to the opportunity to obtain an energy resources from a waste. The aim of this research was to analyze the environmental sustainability use of biosolids generated in a wastewater-treatment plant for energ
Química Nova. Publicado em: 2022
-
2. QUALITY, PERFORMANCE ANALYSIS, MASS TRANSFER PARAMETERS AND MODELING OF DRYING KINETICS OF SOYBEAN
Abstract Different aspects of soybean drying such as energy and exergy analyses, quality, mass transfer parameters, and modeling of drying kinetics were investigated in a microwave dryer. Results showed that energy and exergy efficiency increased with increasing microwave power, while values of energy efficiency (33.70 to 66.0%) were higher than exergy effic
Braz. J. Chem. Eng.. Publicado em: 2017-01
-
3. Human thermal comfort: an irreversibility-based approach emulating empirical clothed-body correlations and the conceptual energy balance equation
Exergetic analysis can provide useful information as it enables the identification of irreversible phenomena bringing about entropy generation and, therefore, exergy losses (also referred to as irreversibilities). As far as human thermal comfort is concerned, irreversibilities can be evaluated based on parameters related to both the occupant and his surround
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
-
4. Exergy and thermoeconomic evaluation of a petroleum refinery hydrogem production unit. / Produção de hidrogênio em refinarias de petróleo: avaliação exergética e custo de produção.
Pure hydrogen (H2) is an useful gas in chemical and petrochemical industries because it reacts easily with several other elements. On refineries, hydrogen is used to sequestrate sulphur from diesel and gasoline. Emission restrictions regard to fossil fuels are rising the world hydrogen demands. In spite of its abundance, hydrogen is normally found associated
Publicado em: 2010
-
5. Análise energética e exergética de um sistema de cogeração com motores de combustão interna / Energy and exergy analysis of a cogeneration system using an internal combustion engine
Dentre as alternativas de geração de energia, os sistemas de cogeração provaram ser uma boa opção para a produção de energia distribuída em locais de carga elétrica e térmica coincidente. Estas demandas podem variar numa ampla faixa, o que faz com que os sistemas de cogeração atinjam alto fator de utilização de energia (FUE) em horas de coinci
Publicado em: 2010
-
6. Hydrogen from biomass gas steam reforming for low temperature fuel cell: energy and exergy analysis
This work presents a method to analyze hydrogen production by biomass gasification, as well as electric power generation in small scale fuel cells. The proposed methodology is the thermodynamic modeling of a reaction system for the conversion of methane and carbon monoxide (steam reforming), as well as the energy balance of gaseous flow purification in PSA (
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
-
7. Analise do desempenho termodinamico e ambiental de um ciclo de refrigeração e proposta de uma função global de avaliação / Thermodynamic and enviromental analisys of a refrigerator cycle performance and propose of a global function evaluation
This work presents a proposal function to vapor compression refrigerator cycle performance from environmental and thermodynamic point of view. The function was developed through the statistic analysis of a refrigerator cycle computational results. The proposal function represents an evaluation indice of efficiency and environment criterions and was developed
Publicado em: 2009
-
8. Análise e otimização termo-econômica-ambiental aplicada à produção combinada de açúcar, álcool e eletricidade. / Thermo-economic-environmental analysis and optimization applied to the combined production of sugar, ethanol and electricity.
O presente trabalho objetiva a obtenção de configurações ótimas para geração conjunta de energia eletromecânica e calor em usinas sucroalcooleiras, avaliando o impacto destas nos custos de produção de açúcar, álcool e eletricidade. Desta maneira, uma proposta para a avaliação do uso racional da energia em usinas é desenvolvida, utilizando as
Publicado em: 2008
-
9. Exergetic and economic analysis of an industrial distillation column
In this work, applications of exergy and economic concepts to compression, heat exchange, and separation processes were used for calculation of the irreversibility rate, thermodynamic efficiency, and internal rate of return (IRR) of the profitability. A case study based on a real process, the purification of 1,2-dichloroethane (DCE) in a high-purity distilla
Brazilian Journal of Chemical Engineering. Publicado em: 2007-09
-
10. Exergy analysis of thermal systems in a pulp and paper production process. / Análise exergética dos sistemas térmicos em um processo de produção de celulose e papel.
This work presents a comparative evaluation from thermodynamic performance view of thermal systems in a Kraft pulp and paper mill. The design information and the data of the industrial operation were collected for the current utility system and for the new system that has been buit. The exergy analysis is applied as the quantitative and qualitative evaluatio
Publicado em: 2007
-
11. Análise exergética, termoeconômica e ambiental de uma usina termoelétrica: estudo de caso: usina termoelétrica UTE - Rio Madeira da Eletronorte / Exergetic, thermoeconomic and environmental assessment of a power generation plant: case study: rio Madeira Thermoeletric Power Plant
This work mainly discusses the theory and application of three analyses based on the concept of exergy. In a chapter 4 called Estudo de Caso an exergetic and thermoeconomic analysis on a real power generation system are carried out, and an environmental analysis on that system is executed in the chapter 5. This real power generation system is the gas turbine
Publicado em: 2007
-
12. Evaluation ecological-thermodynamics and economic of nations : Peru as case study. / Avaliação ecologica-termodinamica e econômica de nações : o Peru como estudo de caso.
In recent decades has increased the preoccupations related to the deterioration of socioenvironmental systems. This work allows add the interest in the search for appropriate methods of environmental accounting to help measure the sustainability. In this thesis, the methods following were applied: the Ecological Footprint, Exergy Analysis and Emergy Analysis
Publicado em: 2007