Now showing items 1-10 of 17
Thermoeconomic analysis: A criterion for the selection of cogeneration systems
(American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES, 1996-12-01) [Artigo]
The economical viability of three cogeneration schemes as supplying alternatives for a hypothetical industrial process has been studied. A cost appropriation method based on Valero's studies (1986) has been used. This ...
Turbulence modeling in engineering applications
(Revista de Engenharia e Ciencias Aplicadas, 1996-12-01) [Artigo]
A brief review is given of turbulence models in use today for engineering applications. The main categories covered are simple eddy-viscosity models, the k-ε two-equation model and Reynolds-stress-equation models as well ...
Cogeneration system design optimization
(Revista Brasileira de Ciencias Mecanicas/Journal of the Brazilian Society of Mechanical Sciences, 1996-12-01) [Artigo]
Cogeneration system design deals with several parameters in the synthesis phase, where not only a thermal cycle must be indicated but the general arrangement, type, capacity and number of machines need to be defined. This ...
The Liapunov exponent as a tool for exploring phase space
(Chaos In Gravitational N-body Systems, 1996-01-01) [Trabalho apresentado em evento]
We have used the Liapunov exponent to explore the phase space of a dynamical system. Considering the planar, circular restricted three-body problem for a mass ratio mu = 10(-3) (close to the Jupiter/Sun case), we have ...
Thermal diffusivity measurements in C2H2-plasma polymerized films using photoacoustic techniques
(Journal of Materials Science Letters, 1996-04-01) [Artigo]
Cogasification of solid fuels
(American Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT, 1996-12-01) [Artigo]
High efficiency gas turbine based systems, utility deregulation and more stringent environmental regulations strongly favor the use of natural gas over coal and other solid fuels in new electricity generators. Solid fuels ...
(International Journal of Modern Physics A, 1996-12-01) [Artigo]
We consider an extension of the axial model where local gauge symmetries are taken into account. The result is a mixing of the axial and Schwinger models. The anomaly of the axial current is calculated by means of the ...
Plasma polymerized hexamethyldisiloxane: Discharge and film studies
(Vacuum, 1996-02-01) [Artigo]
Films were grown in hexamethyldisiloxane (HMDS)-argon mixtures in a diode sputtering system with a gold cathode. Quantitative optical emission spectroscopy (OES)-actinometry revealed that the electron density or mean ...
Towards an intelligent graphical interface for linear programming modelling
(Journal of Intelligent Systems, 1996-12-01) [Artigo]
The increase of computing power of the microcomputers has stimulated the building of direct manipulation interfaces that allow graphical representation of Linear Programming (LP) models. This work discusses the components ...
Effective aspect-ratio and gate-capacitance in circular geometry MOS transistors
(Solid-state Electronics, 1996-10-01) [Artigo]