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Stratified two-phase flow pattern modulation in a horizontal tube by the mesh pore cylinder surface

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Listed:
  • Chen, Hongxia
  • Xu, Jinliang
  • Li, Zijin
  • Xing, Feng
  • Xie, Jian

Abstract

Condensation heat transfer has been studied in the past century due to its wide applications in energy and power systems. The key scientific issue is the thick liquid thickness near the tube wall along the condenser tube length. The fabricated microstructures on the inner wall are the conventional technique to improve the performance. Here a passive phase separation concept was proposed to create distinct phase distribution. An empty cylinder made of a single layer of mesh pore surface was suspended in a tube, dividing the tube into an annular region and an inner region. The mesh pore surface prevents gas phase entering the inner region but sucks liquid towards the inner region. Thus largest possibility for gas directly contacted with the inner wall surface is ensured. An air/water two-phase flow experiment was performed and the stratified flow pattern modulation was investigated. When the liquid level in the horizontal tube is relatively higher, the liquid can be thoroughly within the mesh cylinder to form the “gas-floating-liquid” mode. The whole inner tube wall surface is covered by the gas phase. If the liquid content is relatively smaller, partial liquid can be sucked into the mesh cylinder. The contact area between the inner tube wall and gas is increased. The stratified flow pattern modulation is expected to significantly enhance the condensation heat transfer under low mass fluxes which is being verified by our continuous experiment.

Suggested Citation

  • Chen, Hongxia & Xu, Jinliang & Li, Zijin & Xing, Feng & Xie, Jian, 2013. "Stratified two-phase flow pattern modulation in a horizontal tube by the mesh pore cylinder surface," Applied Energy, Elsevier, vol. 112(C), pages 1283-1290.
    • Handle: RePEc:eee:appene:v:112:y:2013:i:c:p:1283-1290
    DOI: 10.1016/j.apenergy.2012.11.062
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    References listed on IDEAS

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    1. Al-Nimr, M. A. & AlKam, M. K., 1997. "Film condensation on a vertical plate imbedded in a porous medium," Applied Energy, Elsevier, vol. 56(1), pages 47-57, January.
    2. Zhang, Li & Yang, Sheng & Xu, Hong, 2012. "Experimental study on condensation heat transfer characteristics of steam on horizontal twisted elliptical tubes," Applied Energy, Elsevier, vol. 97(C), pages 881-887.
    3. Gong, Guangcai & Chen, Feihu & Su, Huan & Zhou, Jianyong, 2012. "Thermodynamic simulation of condensation heat recovery characteristics of a single stage centrifugal chiller in a hotel," Applied Energy, Elsevier, vol. 91(1), pages 326-333.
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    Cited by:

    1. Zhao, X.B. & Tang, G.H. & Ma, X.W. & Jin, Y. & Tao, W.Q., 2014. "Numerical investigation of heat transfer and erosion characteristics for H-type finned oval tube with longitudinal vortex generators and dimples," Applied Energy, Elsevier, vol. 127(C), pages 93-104.
    2. Lu, Pei & Zhao, Li & Zheng, Nan & Liu, Shengli & Li, Xiaobing & Zhou, Xing & Yan, Jingbo, 2022. "Progress and prospect of flow phenomena and simulation on two-phase separation in branching T-junctions: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
    3. Ma, Xiaojing & Xu, Jinliang & Xie, Jian, 2021. "In-situ phase separation to improve phase change heat transfer performance," Energy, Elsevier, vol. 230(C).
    4. Guo, Hang & Liu, Xuan & Zhao, Jian Fu & Ye, Fang & Ma, Chong Fang, 2014. "Experimental study of two-phase flow in a proton exchange membrane fuel cell in short-term microgravity condition," Applied Energy, Elsevier, vol. 136(C), pages 509-518.

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