CATEGORY: NATURAL GAS
Thermal Science 2012 OnLine-First Issue 00,
Pages: 82-82, doi:10.2298/TSCI110505082F
The
second law analysis of natural gas behavior within a vortex tube
Kargaran Mahyar, Arabkoohsar A., Hagighat-Hosini S.J., Farzaneh-Kord
V., Farzaneh-Gord Mahmood
Abstract
A vortex
tube is a simple device without moving parts, capable of separating hot and
cold gas streams from a higher pressure inlet gas stream. Researchers studied the
mechanism of energy separation and determined the second law approach to be an
important tool for optimizing the vortex tube performance.
Authors present a thermodynamic model employed to investigate vortex
tube energy separation. In addition, they propose a method for optimizing the
vortex tube based on the rate of entropy generation obtained from experiments.
Also, an experimental study was conducted to investigate the effects of the hot
tube length and cold orifice diameter on entropy generation within a vortex
tube with natural gas as working fluid. A comparison is made between air and natural
gas as working fluids. Results show that the longest tube generates lowest
entropy for NG. For air, it is the middle tube which generates lowest entropy.
Integration of entropy generation for all available cold mass fractions revealed
that an optimized value for hot tube length and cold orifice diameter exists.
Free Full Text Source: http://www.doiserbia.nb.rs/Article.aspx?ID=0354-98361200082F
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