Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Heat and Flow Analysis Inside a Parallel-Flow Heat Exchanger

평행류 열교환기 내부의 열유동 해석

  • 오석진 (한양대학교 대학원 기계공학과) ;
  • 정길완 (한양대학교 기계기술연구소) ;
  • 이관수 (한양대학교 기계공학부)
  • Published : 2003.06.01
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Abstract

In the present study, the heat and flow characteristics of a parallel-flow heat exchanger are numerically analyzed by using three-dimensional turbulent modeling. Heat transfer rate and pressure drop are evaluated using the concept of the efficiency index by varying the locations, the shapes and angles of inlet/outlet, and the protrusion height of flat tube. It is found that negative angle of the inlet improves the heat transfer rate and pressure drop. Results show that the locations of the inlet and outlet should be toward the right side and the left side to the reference model, respectively, in order to enhance the heat transfer rate and pressure drop. Increasing the height of the lower header causes pressure drop to decrease and yields the good flow characteristics. The lower protrusion height of flat tube shows the improvement of the heat transfer rate and pressure drop. The heat transfer rate is greatly affected by the parameters of outlet side such as the location and angle of the outlet. However, the pressure drop is influenced by the parameters of inlet side such as the location and angle of inlet and the height of the header.

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References

  1. Marvillet, C.. 1993, 'Recent Developments in Heat Exchangers for Automotive Applications,' Recent Developments in Finned Tube Heal Exchangers Theoretical and Practical Aspects. pp. 8-51
  2. Nakamura. Y., Jia, W.. and Yasuhara. M .. 1989, 'Incompressible Flow Through Multiple Passages,' Numerical Heat Transfer. Vol. 16. pp. 451-465 https://doi.org/10.1080/10407788908944726
  3. Choi. S. H., Shin. S., and Cho, Y. I., 1993, 'The Effect of Area Ratio on the Flow Distribution in Liquid Cooling Module Manifolds for Electronic Packaging,' Int. Comm Heat Mass Transfer. Vol. 20. pp. 221-234 https://doi.org/10.1016/0735-1933(93)90050-6
  4. Trauger, P. E. and Hughes, G. G., 1993. 'Construction and Performance Characteristics of the $PFE^{TM}$ Evaporator,' SAE Technical Paper Series 930155, pp. 171-177
  5. Chung, K., Lee, K-S. and Kim, W-S., 2002, 'Optimization of the Design Factors for Thermal Performance of a Parallel-Flow Heat Exchanger,' Int. J. of Heat and Mass Transfer, Vol 45, No. 24, pp. 4773-4780 https://doi.org/10.1016/S0017-9310(02)00195-3
  6. Lee, K. S. and Oh, S. J., 2000, 'Thermal and Flow Analysis Inside the Header of a Parallel flow Heat Exchanger,' Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 12. No. 9, pp. 802-809
  7. Oh. S. J. and Lee. K. S., 2001, 'Optimal Shape of Header Part in a Parallel-Flow Heat Exchanger,' Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 13. No. 10. pp. 1017-1024
  8. Rokni. M. and Sunden B., 1999. 'Turbulence Modeling Experience in Ducts with Forced Convection Flow.' Numerical Heat Transfer, Vol. 35. pp. 629-654 https://doi.org/10.1080/104077899275074
  9. Seyedein. S. H., Hasan, M., and Mujumdar, A. S., 1995. 'Turbulent Flow and Heat Transfer from Confined Multiple Impinging Slot Jets,' Numerical Heat Transfer, Vol. 27. pp. 35-51 https://doi.org/10.1080/10407789508913687
  10. Yang. Y.-T and Tsai. T.-Y., 1998, 'Numerical Calculation of Turbulent Flow in a Planar Bifurcation with a Protruding Branching Duct,' Numerical Heat Transfer, Vol. 34, pp. 61-74 https://doi.org/10.1080/10407789808913977
  11. Tsui, Y.-Y. and Leu, S.-W., 1999, 'Heat Transfer Enhancement by a Multilobe Vortex Generator in Internally Finned Tybes,' Numerical Heal Transfer, Vol. 35, pp. 553-566 https://doi.org/10.1080/104077899275155
  12. Etemad, S. Gh. and Mujumdar, A. S., 1994, 'The Effect of Area Ratio and Rounded Corners on the Laminar Forced Convection Heat Transfer of a Non Newtonian Fluid in the Entrance Region of a Rectangular Duct,' Int. Comm Heat Mass Transfer, Vol. 21, pp. 283-296 https://doi.org/10.1016/0735-1933(94)90026-4
  13. Aparecido, J. B. and Cotta, R. M., 1990, 'Thermally Developing Laminar Flow Inside Rectangular Ducts,' Int. J. of Heal and Mass Transfer, Vol. 33, No. 2, pp. 341-347 https://doi.org/10.1016/0017-9310(90)90103-2