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Numerical benchmark of a Ranque–Hilsch vortex tube working with subcritical carbon dioxide

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  • Oberti, Raphaël
  • Lagrandeur, Junior
  • Poncet, Sébastien

Abstract

A numerical benchmark of a Ranque–Hilsch vortex tube using subcritical carbon dioxide as the working fluid is performed. Predictions using different thermodynamic and two-equation turbulence models in high or low-Reynolds number formulations are compared to experimental data available in the literature. The results show that the k−ω SST model outperforms both the Standard k−ϵ model and the SAS-SST model in terms of cold and hot outlet total temperature predictions. Considering real-gas equations of state improves the accuracy even at subcritical conditions. In this regard, the multi-parameter Span–Wagner equation of state yields the best hot outlet total temperature prediction, especially at high operating pressure. Hence, the k−ω SST model in conjunction with the Span–Wagner equation of state are selected to examine internal flow features and discuss the validity of most common assumptions made by one-dimensional thermodynamic models. Finally, the exergy efficiency of the present vortex tube at various cold mass fractions is quantified.

Suggested Citation

  • Oberti, Raphaël & Lagrandeur, Junior & Poncet, Sébastien, 2023. "Numerical benchmark of a Ranque–Hilsch vortex tube working with subcritical carbon dioxide," Energy, Elsevier, vol. 263(PC).
    • Handle: RePEc:eee:energy:v:263:y:2023:i:pc:s0360544222026792
    DOI: 10.1016/j.energy.2022.125793
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    References listed on IDEAS

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    1. Zhang, Bo & Guo, Xiangji, 2018. "Prospective applications of Ranque–Hilsch vortex tubes to sustainable energy utilization and energy efficiency improvement with energy and mass separation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 89(C), pages 135-150.
    2. Thakare, Hitesh R. & Monde, Aniket & Parekh, Ashok D., 2015. "Experimental, computational and optimization studies of temperature separation and flow physics of vortex tube: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1043-1071.
    3. Yefeng Liu & Ying Sun & Danping Tang, 2019. "Analysis of a CO 2 Transcritical Refrigeration Cycle with a Vortex Tube Expansion," Sustainability, MDPI, vol. 11(7), pages 1-14, April.
    4. Thakare, Hitesh R. & Parekh, A.D., 2015. "Computational analysis of energy separation in counter—flow vortex tube," Energy, Elsevier, vol. 85(C), pages 62-77.
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    Cited by:

    1. Huang Rui & Zhou Kang & Pengcheng Guo & Ma Wei, 2023. "Investigation of Transcritical Carbon Dioxide Power Generation System Based on Vortex Tube," Energies, MDPI, vol. 16(9), pages 1-18, April.

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