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Flow and Heat Transfer Characteristics of S-CO 2 in a Vertically Rising Y-Tube

Author

Listed:
  • Xiaohong Hao

    (Institute of Advanced Power Equipment and Technology, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Su Du

    (Institute of Advanced Power Equipment and Technology, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Qiguo Yang

    (Institute of Advanced Power Equipment and Technology, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Sen Zhang

    (Institute of Advanced Power Equipment and Technology, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Qi Zhang

    (Institute of Advanced Power Equipment and Technology, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

Abstract

The supercritical carbon dioxide Brayton cycle has gradually become a research focus, but we also see a deficiency in research related to the flow and heat transfer characteristics of S-CO 2 boiler staves with high parameters. In this paper, the flow and heat transfer of supercritical carbon dioxide is investigated in a 1000 MW supercritical boiler cooled wall tube in the parameters of a pressure of 30.42 MPa, a mass flux of 1592~2207 kg/(m 2 ·s), and a heat flux of 39.8~71.2 kw/m 2 ; a three-dimensional model of supercritical CO 2 fluid in the cooling wall tube is established with the RNG k-epsilon turbulence model. Numerical simulations are carried out according to the following boundary conditions: an adiabatic half side, a heated half side, and a Y-type three-way two-to-one. The effects of the mass flux, inlet temperature, and heat flux on the flow and heat transfer characteristics in the Y-tube are analyzed, which exerts great influence on the research of S-CO 2 boiler stave thermodynamics.

Suggested Citation

  • Xiaohong Hao & Su Du & Qiguo Yang & Sen Zhang & Qi Zhang, 2022. "Flow and Heat Transfer Characteristics of S-CO 2 in a Vertically Rising Y-Tube," Energies, MDPI, vol. 15(9), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3312-:d:807330
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    References listed on IDEAS

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    1. Mohammadi, Z. & Fallah, M. & Mahmoudi, S.M. Seyed, 2019. "Advanced exergy analysis of recompression supercritical CO2 cycle," Energy, Elsevier, vol. 178(C), pages 631-643.
    2. Crespi, Francesco & Gavagnin, Giacomo & Sánchez, David & Martínez, Gonzalo S., 2017. "Supercritical carbon dioxide cycles for power generation: A review," Applied Energy, Elsevier, vol. 195(C), pages 152-183.
    3. Francisco Javier Gutiérrez Ortiz & Francisco López-Guirao & Francisco José Jiménez-Espadafor & José Manuel Benjumea, 2021. "Heat Transfer Limitations in Supercritical Water Gasification," Energies, MDPI, vol. 15(1), pages 1-14, December.
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