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Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating

Author

Listed:
  • Luis F. Villalón-López

    (Faculty of Mechanical Engineering, “W” Building, Central Campus, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58030, Michoacán, Mexico)

  • Víctor M. Ambriz-Díaz

    (Tecnológico Nacional de México/I. T. Chihuahua, Av. Tecnológico, 2909, Chihuahua 31310, Chihuahua, Mexico)

  • Carlos Rubio-Maya

    (Faculty of Mechanical Engineering, “W” Building, Central Campus, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58030, Michoacán, Mexico)

  • Oscar Chávez

    (Tecnológico Nacional de México/I. T. Chihuahua, Av. Tecnológico, 2909, Chihuahua 31310, Chihuahua, Mexico)

  • Israel Y. Rosas

    (Tecnológico Nacional de México/I. T. Chihuahua, Av. Tecnológico, 2909, Chihuahua 31310, Chihuahua, Mexico)

Abstract

Natural gas stations require a preheating stage to prevent the formation of hydrates inside of them provoked by a sudden decompression process of the natural gas. The preheating process has been investigated to improve efficiency and to reduce costs as well. This work studies the behavior of a natural gas decompression station with a first-stage preheating process using a vortex tube and a geothermal heat exchanger, followed by a second stage involving a water bath heater (heating vat). An energetic, exergetic, and exergoeconomic study has been carried out based on a mathematical model and the theory of exergetic cost, obtaining key thermodynamic and thermoeconomic variables, including exergy flows and equipment costs. A heat flow of 26.41 kW was obtained in the geothermal preheating stage; meanwhile, a 60.43 kW heat flow was obtained in the heating vat. The results showed a saving in station fuel using only 2.046% of the natural gas in the system at the second preheating stage. Also, the system was optimized, obtaining a 15.73% reduction in the decompressed natural gas cost. These findings show the possibility of implementing these systems in zones with many geothermal resources to reach a constant, profitable natural gas supply in areas where a pipeline network does not exist.

Suggested Citation

  • Luis F. Villalón-López & Víctor M. Ambriz-Díaz & Carlos Rubio-Maya & Oscar Chávez & Israel Y. Rosas, 2024. "Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating," Sustainability, MDPI, vol. 16(4), pages 1-33, February.
  • Handle: RePEc:gam:jsusta:v:16:y:2024:i:4:p:1669-:d:1340795
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    References listed on IDEAS

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