Thermoeconomic
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Estudo das características estruturais e das propriedades funcionais do amido de sementes de jaca (Artocarpushete-rophylusLam) variedades mole e dura.
Starch is a polysaccharide used as a source of carbohydrates in the human diet, with wide application in food industry, textile and pharmaceutical industries. The search for new sources starch is growing, causing the production sector is seeking new technologies, as well as natural starches with different chemical and physical characteristics. The objective
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2012
-
2. APPLICATION OF NANOFLUIDS IN SECONDARY REFRIGERATION SYSTEMS / APLICAÇÃO DE NANOFLUIDOS EM SISTEMAS SECUNDÁRIOS DE REFRIGERAÇÃO
The application of nanofluids as secondary fluids in vapor compression refrigeration systems is studied with the development of a lumped-parameter thermodynamic model. When a nanofluid is used as a heat transfer fluid, its thermal conductivity and viscosity increase, when compared with the corresponding properties of the base fluid. The irreversibilities due
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
-
3. Micro-turbine design point definition using optimization techniques
During a gas turbine development phase an important engineer task is to find the appropriate engine design point that meet all required specifications. This task can be very arduous because all possible operating points in the gas turbine operational envelope need to be analyzed, for the sake of verification of whether or not the established performance migh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
-
4. Maximum profit cogeneration plant - MPCP: system modeling, optimization problem formulation, and solution
The well-known CGAM optimization problem was formulated to serve as a benchmark for comparison of different thermoeconomic methodologies. The CGAM cogeneration plant produced 30 MW of power and 14 kg/s of saturated vapor at 20 bar. The objective function was the total cost rate of the system, related to thermodynamic variables and installation costs. Because
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-03
-
5. Aplicação de termoeconomia na análise de um processo industrial de aquecimento de reatores químicos / Thermoeconomic analysis applied to heating industrial process in chemical reactors
Alinhado à constante busca por melhor desempenho ambiental por parte da indústria com a aplicação dos conceitos de eficiência energética, proporcionando maior competitividade devido à otimização de recursos, o objetivo deste trabalho consiste em avaliar os possíveis impactos ambientais positivos, somados aos ganhos econômicos produzidos pela redu�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2010
-
6. Otimização termoeconomica de sistemas de refirgeração do processo de produção de etileno e propileno / Thermoeconomic optimization of refrigeration systems of the production process of ethylene and propylene
A indústria petroquímica é o setor industrial que utiliza como matéria prima derivados do petróleo, principalmente a nafta petroquímica, da qual se produzem substâncias como o etileno e propileno. Nesse processo industrial utilizam-se ciclos de refrigeração de larga escala que fornecem utilidades frias ao processo, em especial aos condensadores das
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2010
-
7. 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
-
8. 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
-
9. Tecnicas de modelagem, simulação e otimização de processos de refrigeração e de congelamento
In this work the modelling, the simulation and the optimisation of a refrigeration system applied to food freezing processes are developed. The study is divided in two stages: the first part tries to identify the typical thermodynamic behaviour of a refrigeration plant, together with the development of a methodology for simulation and for a thermoeconomic op
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2000
-
10. Tecnicas de modelagem, simulação e otimização de processos de refrigeração e de congelamento
In this work the modelling, the simulation and the optimisation of a refrigeration system applied to food freezing processes are developed. The study is divided in two stages: the first part tries to identify the typical thermodynamic behaviour of a refrigeration plant, together with the development of a methodology for simulation and for a thermoeconomic op
Publicado em: 2000
-
11. Avaliação termoeconomica do sistema de cogeração da usina vale do rosário
In the present work, a cogeneration system of a sugar-alcohol cane mill isevaluated. Using the Exergetic Cost Theory, a thermoeconomic analysis is made for three crops, corresponding to the years of 1996, 1997 and 1998. Previusly, na energetic and exergetic analysis was made, determining the first and second law equipment s efficiencies and also some perform
Publicado em: 1999
-
12. Aplicação de algoritmo genetico ao dimensionamento de sistemas de cogeração industrial no Brasil : o caso de uma refinaria de petroleo
This thesis discusses the current scenario of the petroleum industry, as well as, the electric energy self-producer in terms of its legal evolution, particularly of the industrial cogenerator. This work also develops a industrial cogeneration planning system model by combining genetic algorithm and dynamic programming. Such a planning model has a pre-dimensi
Publicado em: 1998