Pinch Analysis
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Thermodynamic analysis of a petroleum fractionation column / Analise termodinamica de uma coluna de fracionamento de petroleo
Nos dias atuais, um grande desafio das indústrias é conciliar a produção com os padrões de qualidade exigidos pelo mercado e o mínimo consumo energético. Em uma unidade industrial, a coluna de destilação é uma das operações unitárias que mais consome energia e freqüentemente aparece em maior número. Conseguir otimizar a utilização das fontes
Publicado em: 2004
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14. Analise energetica global de um complexo petroquimico / Total site analysis of a petrochemical complex
The constant search of energy costs reduction in the petrochemical industry, provided the development of new energy optimization methodologies, which Pinch Analysis stand out. However, the goods results achieved in single process, with this methodology, were not materialised at the site boundary. This problem is caused by the interdependence of the processes
Publicado em: 2003
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15. Desenvolvimento e avaliação de sistema envolvendo interface de análise por injeção em fluxo com eletroforese capilar / Design and evaluation of an automatic system for flow injection analysis capillary electrophoresis with contactless conductivity
The synergistic combination of flow injection analysis with capillary electrophoresis, FIA-CE, is a new and rapidly evolving field, comprising juxtaposition of equipments (at-line FIA-CE) and true interfacing or hyphenation (in-line or on-line FIA-CE). Typically, FIA circuits assembled in the laboratory are interfaced to commercial electrophoresis equipments
Publicado em: 2002
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16. Injetor multicanal com válvulas de estrangulamento para análise em fluxo
An important component for the automation of flow injection analysis (FIA) systems is the sample injection valve. A simple and inexpensive commutator with 16 pinch valves (8 normally open and 8 closed) was developed and configured as a multichannel injection valve. It is activated by a single solenoid of 3 Kgf, powered by a pulsed driver circuit, controlled
Química Nova. Publicado em: 2001-10
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17. Pinch analysis of evaporation systems
Evaporation systems are separation processes widely used in chemical industries. Some guidelines can be found in the literature for the process integration of multiple effect evaporators. In the published methodologies some aspects are neglected as boiling point rise, effect of pressure on latent heat of water, sensible heat of liquid streams, heat of mixing
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12
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18. Thermodynamic analysis of multicomponent distillation columns: identifying optimal feed conditions
A new methodology for the optimisation of feed conditions as well as the calculation of minimum reflux ratio of distillation columns is presented. The reversible profile approach used for saturated liquid feeds is extended to consider other feed conditions. For flashed feed, the liquid fraction of the feed stream is used to compute the column pinch condition
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12
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19. Sintese de sistemas de recuperação de energia para trocadores do tipo casco e tubos com restrições de troca termica
Um novo procedimento de estimativa de área e custos de capital para sistemas sob integração energética é proposto. Este método permite que restrições de troca térmica e trocadores com mais de uma passagem nos tubos sejam utilizados. O método desenvolvido resulta em um modelo não linear onde, balanços de energia, restrições de troca térmica e o
Publicado em: 2000
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20. Energy consumption optimization in a sugar plant using pinch technology and linear programming / Otimização do consumo de energia em usinas de açucar e alcool atraves dos metodos do "Pinch-Point" e programação linear
Using pinch technology and linear prograrnrning, several simulations of thermal analysis of a typical sugar cane plant and alcohol production were performed. The objective was the maximum heat recovery and the reduction of steam consumption. The simulations were divided into three groups. In the fIrst, pinch technology was applied to analyze only the sugar c
Publicado em: 1999
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21. Utilização da analise pinch na redução de emissões de poluentes
This work is based on the study of the reduction in the emission of pollutants through a network of mass transfer equipments by using Pinch Analysis. The main objective of this work is to combine both the task of the synthesis of those mass transfer equipments and economical viability when applied to the case of water reuse and mass process integration the P
Publicado em: 1999
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22. Redução de efluentes aquosos em processos quimicos : "pinch analysis" aplicada a processos de transferencia de massa
In this work, a new methodology for water-using process analysis is shown. The procedure is based on Pinch Analysis concepts. The method is based on the concept that contaminated water from one process may be used in other process if the minimum driving force for mass transfer for each contarninant is maintained. In the first stage, the rninimum freshwater c
Publicado em: 1998
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23. Estrategias de otimização de processos
In the present work a strategy of set optimization is proposed by joining deterministic and statistics techniques. Intents to do analyses of integration of the energy point of view and mass. This strategy seeks the use of the mathematical formalism, used in the simulation and optimization units for half deterministic, as well as the employment of stocastic m
Publicado em: 1998
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24. Otimização energetica de redes de trocadores de calor industriais : aplicações em engenharias de petroleo, alimentos e quimica
This work deals with the industrial process analysis, includingvarious types and sizes, looking for their optimization fiom the economic and energetic point of view. Not only a single point of optimality was searched but a set of options which could permit to a decision maker to choose the best situation in each case. ln the development of this study were ut
Publicado em: 1995