Results 251 to 260 of about 2,031,963 (293)

Centrifugation equilibrium of natural gas

Chemical Engineering Science, 2005
The problem of determining the pressure and composition profiles of natural gas under centrifugation is formulated and solved as the minimization of a modified Helmholtz function that includes the contribution of the centrifugal field. Fluid properties are calculated using the Peng-Robinson equation of state but the procedure can be readily extended to
Marcelo Castier, Frederico W. Tavares
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Gas centrifugation of research isotopes

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
Abstract The use of the gas centrifugation process now makes it possible to produce isotopes of several elements in kilogram quantities.
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Centrifugal Separation for Cleaning Well Gas Streams

Industrial & Engineering Chemistry Research, 2004
An examination of centrifugal gas separation applied to natural gas wells shows that it has some technical advantages for bulk removal of souring components in highly contaminated streams. Different criteria from those used in traditional UF6 processing apply, and we develop and describe these.
Golombok, M., Chewter, L.
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Gas Dynamic Designs of Centrifugal Compressors for Gas Industry

ASME 2015 Gas Turbine India Conference, 2015
Centrifugal compressors for gas industry consume huge amount of energy. As a rule, they are single-shaft, with two or more stages and with comparatively low pressure ratio. Compressors operate at low Mach numbers and high Reynolds numbers. Two design parameters influence mostly stage performances.
Y. Galerkin, A. Rekstin, K. Soldatova, A. Drozdov   +3 more
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Particle Trajectories in a Gas Centrifuge

Journal of Basic Engineering, 1961
The motion of spherical particles injected into a cylinder of gas which rotates as a solid body has been studied. The particle trajectory is expressed explicitly as a function of two dimensionless parameters; an injection-velocity parameter and an inertial parameter which is roughly the ratio of centrifugal force to drag force on the particle. The main
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Online adaptation of performance maps for centrifugal gas compressors

2014 European Control Conference (ECC), 2014
This paper investigates the adaptation of different performance maps of centrifugal compressors driven by dualshaft gas turbines during operation. First the estimation of compressor, gas turbine and combined efficiency are considered. Obtaining performance maps is mainly based on fitting an empirical model to the history of past data together with the ...
Cortinovis A., M. Zovadelli, M. Mercangoz, D. Pareschi, A. De Marco, BITTANTI, SERGIO   +5 more
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The evolution of liquid and gas centrifuges

Endeavour, 1978
Abstract Although the principle of separation by centrifugation has been known for nearly a century, the technical difficulties of using it in practice are very great. Only in comparatively recent years has there been sufficient understanding of the underlying theory, and availability of suitable materials of construction, for the high-speed ...
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Centrifugal Gas Compression Cycle

AIP Conference Proceedings, 2002
A centrifuged gas of kinetic, elastic hard spheres compresses isothermally and without flow of heat in a process that reverses free expansion. This theorem follows from stated assumptions via a collection of thought experiments, theorems and other supporting results, and it excludes application of the reversible mechanical adiabatic power law in this ...
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Separation Power of a Gas Centrifuge and Certain Errors in Optimizing the Centrifuge

Atomic Energy, 2002
The theory of separation in a Zippe centrifuge is developed. The physical meaning of the concept “separation power” is examined in application to a gas centrifuge. Ideas concerning the separation power in certain publications and the associated incorrect arguments concerning the optimization of a gas centrifuge are analyzed.
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Laser and gas centrifuge enrichment

AIP Conference Proceedings, 2014
Principles of uranium isotope enrichment using various laser and gas centrifuge techniques are briefly discussed. Examples on production of high enriched uranium are given. Concerns regarding the possibility of using low end technologies to produce weapons grade uranium are explained. Based on current assessments commercial enrichment services are able
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