THERMAL SCIENCE

International Scientific Journal

THE SECOND LAW ANALYSIS OF NATURAL GAS BEHAVIOR WITHIN A VORTEX TUBE

ABSTRACT
Vortex tube is a simple device without a moving part which is capable of separating hot and cold gas streams from a higher pressure inlet gas stream. The mechanism of energy separation has been investigated by several scientists and second law approach has emerged as an important tool for optimizing the vortex tube performance. Here, a thermodynamic model has been used to investigate vortex tube energy separation. Further, a method has been proposed for optimizing the vortex tube based on the rate of entropy generation obtained from experiments. Also, an experimental study has been carried out 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 has been made between air and natural gas as working fluids. The results show that the longest tube generates lowest entropy for NG. For air, it is middle tube which generates lowest entropy. Integration of entropy generation for all available cold mass fractions unveiled that an optimized value for hot tube length and cold orifice diameter is exist.
KEYWORDS
PAPER SUBMITTED: 2011-05-05
PAPER REVISED: 2012-04-26
PAPER ACCEPTED: 2012-05-12
DOI REFERENCE: https://doi.org/10.2298/TSCI110505082F
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2013, VOLUME 17, ISSUE 4, PAGES [1079 - 1092]
REFERENCES
  1. N. F. Aljuwayhel, G.F. Nellis, S.A. Klein, Parametric and internal study of the vortex tube using a CFD model, International Journal of Refrigeration 28, (2005), 442-450.
  2. R.T. Balmer, Pressure driven Ranque Hilsch temperature separation in liquids, J Fluids Eng 110, (1988).
  3. T. Cockerill, The Ranque-Hilsch Vortex Tube, PhD thesis, Cambridge University, Engineering Department, Sunderland, (1995).
  4. K. Dincer, S. Baskayab, B.Z. Uysalc, I. Ucguld, Experimental investigation of the performance of a Ranque-Hilsch vortex tube with regard to a plug located at the hot outlet, International journal of refrigeration 32, (2009), 87-94.
  5. S. Eiamsa-ard, P. Promvonge, Review of Ranque-Hilsch effects in vortex tubes, Renewable and Sustainable Energy Reviews 12, (2008), 1822-1842.
  6. M. Farzaneh-Gord, S. Hashemi, M. Sadi, Energy destruction in Iran's Natural Gas Pipe Line Network, Energy Exploration and Exploitation, Volume 25, Issue 6, (2007).
  7. M. Farzaneh-Gord, M.J. Magrebi, Exergy of Natural Gas Flow in Iran's Natural Gas Fields, International Journal of Exergy, Vol 6, No. 1, (2009), 131-142.
  8. M. Farzaneh-Gord, M. Deymi Dashtbayaz, Recoverable Energy in Natural Gas Pressure Drop Stations: A Case Study of the Khangiran Gas Refinery, Energy Exploration & Exploitation, Volume 26, No. 2, (2008).
  9. M. Farzaneh-Gord, M. Deymi Dashtbayaz, A New Approach to Enhancing Performance of a Gas Turbine (case study: Khangiran Refinery), Applied Energy, 86, (2009), 2750-2759.
  10. M. Farzaneh-Gord, M. Deymi Dashtbayaz, S. Hashemi-Marghzar, A New Inlet Air Cooling Method for Improving Gas Turbine Efficiency (case study: Khangiran Refinery), Journal Of Energy The Institute, Vol 82, No 3, (2009).
  11. M. Farzaneh-Gord, M. Deymi-Dashtebayaz, Effect of Various Inlet Air Cooling Methods on Gas Turbine Performance Energy, Energy 36 (2011), 1196-1205.
  12. M. Farzaneh-Gord, A. Arabkoohsar, M. Rezaei, M. Deymi-Dasht-bayaz. Feasibility of employing solar energy in natural gas pressure drop Stations, Journal of the Energy Institute 2011;84(3):165-173.
  13. M. Farzaneh-Gord, M. Kargaran, Recovering energy at entry of natural gas into customer premises by employing a Counter-Flow vortex tube, oil & Gas Science and Technology-Revue de l'IFP, Vol. 65 (2010), No. 6, pp. 903-912.
  14. M. Farzaneh-Gord, M. Kargaran, Y. Bayat, Sh. Hashemi (a), Investigation of Natural Gas Thermal Separation through a Vortex Tube, Enhanced Heat Transfer, Vol. 19, No. 1, 87-94, (2012).
  15. M. Farzaneh-Gord, A. Arabkoohsar, M. Deymi Dasht-bayaz, V. Farzaneh-Kord (b), Feasibility of accompanying uncontrolled linear heater with solar system in natural gas pressure drop stations, Energy 41 (2012), pp. 420-428, doi10.1016/j.energy.2012.02.058.
  16. R. Hilsch, The use of expansion of gases in a centrifugal field as a cooling process, Rev Sci Instrum. 18, 2, (1974)108-13.

© 2017 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence