Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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The Characteristics of Two-Phase Flow Distribution in a Bottom Dividing Header

  • Im, Yang-Bin (Department of Refrigeration & Air-Conditioning Engineering, Graduate School of Pukyong National University) ;
  • Kim, Jang-Soo (School of Mechanical Engineering, Pukyong National University)
  • Published : 2004.11.01
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Abstract

In this paper an experimental study was investigated for two-phase flow distribution in compact heat exchanger header. A test section was consisted of the horizontal bottom dividing header($\phi$: 5 mm, L: 80 mm) and 10 upward circular mini channels ($\phi$: 1.5 mm, L: 850 mm) using an acrylic tube. Three different types of tube intrusion depth were tested for the mass flux and inlet mass quality ranges of 50 - 200 kg/$m^2$s and 0.1 - 0.3, respectively. Air and water were used as the test fluids. The distribution of vapor and liquid is obtained by measurement of the total mass flow rate and the calculation of the quality. Two-phase flow pattern was observed, and pressure drop of each channel was measured. By adjusting the intrusion depth of each channel an uniform liquid flow distribution through the each channel was able to solve the mal-distribution problem.

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References

  1. Kim. J. S. 1993, Two Phase Distribution in Multi-Parallel Evaporator Tubes (Non-heating mode). J. of Refrigeration Engineering and Air Conditioning. Vol. 12. No. 1, pp. 1-20
  2. Jun Kyoung Lee, Sang Yong Lee, Distribution of two-phase annular flow at header-channel junctions, Proc Int. Conference on Compact Heat Exchange.. 2002. pp.375-379
  3. Sivert Vist. Jostein Pettersen Two-Phase Distribution in Compact Heat Exchanger Manifolds, Proc, Int. Conference on Compact Heat Exchangers 2002, pp.351-356
  4. Pierre Bernoux. Pierre Mercier. Michele Lebouche, Two-Phase Flow Distribution in a Compact Heat Exchanger, Proceeding of International Conference on Compact Heat Exchangers and Enhancement Technology for the Process Industries 2001, pp.347-352
  5. McAdams. W.H.. Woods. W.K.. and Heroman.L. C.. Vaporization inside horizontal tubes. II: Benzen-oil mixtures. Trans. ASME, 1942. pp. 64-193
  6. Satish G. Kandlikar. Two-Phase Flow Patterns, Pressure Drop and Heat Transfer During Boiling in Mini Channel and Micro Channel Flow Passages of Compact Evaporators, Proc. Int. Conference on Compact Heat Exchangers and Enhancement Technology for the Process Industries 2001, pp.319-334
  7. Watanabe M. Katsuta, M and Nagata K. General characteristics of two-phase flow distribution in a multi pass tube, Heat Transfer-Japanese Research, 1995, Vol. 24, No. 1, pp.32-44. 1995
  8. G. F. Hewitt, G. S. Shires, T. R. Bott, 1994, Process Heat Transfer. CRC Press
  9. J. W. Coleman and P. E. Krause Two-phase pressure losses of R-134a in micro channel tube headers with large free flow area ratios, Proc. Int. Conference on Compact Heat Exchangers, 2002. pp. 381-386