International Journal of Air-Conditioning and Refrigeration

  • 제10권2호
  • /
  • Pages.79-87
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  • 2002
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  • 2010-1325(pISSN)
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  • 2010-1333(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

Convective Boiling of R-l34a in a Bundle of Smooth Tubes

  • Kim, Jung-Oh (Graduate School, University of Inchon) ;
  • Cho, Jin-Pyo (Graduate School, University of Incho) ;
  • Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incho) ;
  • Choi, Kuk-Kwang (Department of Mechanical Engineering, University of Inchon)
  • 발행 : 2002.06.01
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초록

In this study, flow boiling experiments were performed using R-134a on a plain tube bundle. Tests were conducted for the following range of variables; quality from 0.1 to 0.9, mass flux from 8kg/$m^2$s to 26 kg/$m^2$s and heat flux from 10kW/$m^2$ to 40kW/$m^2$. The heat transfer coefficients were strongly dependent on the heat flux. However, they were almost independent on the mass flux or quality. The data are compared with the modified Chen model, which predicted satisfactorily ($\pm$30%) the data. The Original Chen model, however, did not adequately predict the effect of quality. The reason may be attributed to the flow pattern of the present test, where the bubbly flow prevailed for the entire test range. The heat transfer coefficients of the tube bundle were 6~40% higher than those of the single tube pool boiling.

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참고문헌

  1. Polley, G. T., Ralston, T. and Grant, I. D. R., 1980, Forced Crossflow Boiling in an Ideal In-Line Tube Bundle, ASME Paper, 80HT-46
  2. Hwang, T. H. and Yao, S. C, 1986, Forced Convective Boiling in Horizontal Tube Bund-les, Int. J. Heat Mass Transfer, Vol. 29, No. 5, pp. 785-795
  3. Jensen, M. K and Hsu, J.-T., 1987, A Para-metric Study of Boiling Heat Transfer in a Tube Bundle, Proc. 1987 ASME-JSME ther-mal Engineering Joint Conf., Vol. 3, pp. 133-140
  4. Reinke, M. J. and Jensen, M. K, 1987, A Comparison of Boiling Heat Transfer Two-Phase Pressure Drop between an Inline and a Staggered Tube Bundle, in Boiling and Condensation in Heat Transfer Equipment, E. G. Ragi et aI. (eds.), ASME, HTD-Vol. 85, pp. 41-50
  5. Cornwell, K and Scoones, D. S., 1988, Analy-sis of Low Quality Boiling on Plain and Low Finned Tube Bundles, IMechE/lChemE, Proc. 2nd UK Heat Transfer Conf., Vol. 1, pp. 21-32
  6. Jensen, M. K, Trewin, R Rand Bergles, A. E., 1992, Crossflow Boiling in Enhanced Tubes, Proc. Engineering Foundation Conf. on Pool and External Flow Boiling, ASME, pp. 373-379
  7. Webb, R L. and Chien, L. H., 1994, Correla-tion of Convective Vaporization on Banks of Plain Tubes Using Refrigerants, Heat Transfer Engineering, Vol. 15, No.3, pp. 57-69
  8. Webb, R L. and Gupte, N. S., 1992, A Cri-tical Review of Correlations for Convective Vaporization in Tubes and Tube Banks, Heat Transfer Eng., Vol. 13, No.3, pp. 58-81
  9. Chen, J. C., 1966, A Correlation for Boiling Heat Transfer to Saturated Fluids in Con-vective Flow, Ind. Eng. Chem. Process De-sign Dev., Vol. 5, No.3, pp. 322-329.
  10. Gupte, N. S. and Webb, R L., 1995, Convec-tive Vaporization Data for Pure Refrigerants in Tube Banks, HVAC & R Research, Vol. 1, No.1, pp. 48-60
  11. Kim. N-H. and Choi, K-K, 2001, Nucleate Pool Boiling of Structured Enhanced Tubes Having Connecting Gaps, printing in Int. J. Heat Mass Trans, Vol. 44, pp. 17-28
  12. Kline, S. J. and McClintock, F. A., 1953, The Description of Uncertainties in Single Sample Experiments, Mechanical Engineering, Vol. 75, pp. 3-9
  13. Noghrehkar, R, Kawaji, M. and Chan, A. M. C., 1999, An Experimental Study of Two-Phase Flow Regimes In-Line and Staggered tube Bundles Under Cross-Flow Conditions, Int. J. Multiphase Flow
  14. Gupte, N. S. and Webb, R. L., 1992, Convec-tive Vaporization of Refrigerants in Tube Banks, ASHRAE Transactions; Symposia, pp. 411-424.3
  15. Cooper, M. G., 1984, Saturation Nucleate Pool Boiling-a Simple Correlation, International Chemical Engineering Symposium Series, No. 86, pp. 785-792
  16. Zhukauskas, A., 1972, Heat transfer from Tubes in Cross Flow, in Advances in Heat Transfer, J. P. Hartnett and T. F. Irvine (eds.), Vol. 8, Academic Press, New York
  17. Bennett, L. and Chen, J. C., 1980, Forced Convective Boiling In Vertical Tubes for Saturated Pure Components and Binary Mix-tures, AIChE J., Vol. 26, No.3, pp. 454-461