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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

A Theoretical Study of Film Condensation in Horizontal Microfin Tubes

[+] Author and Article Information
Hiroshi Honda, Huasheng Wang

Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

Shigeru Nozu

Dept. of Systems Engineering, Okayama Prefectural University, Souja, Okayama 719-1197, Japan

J. Heat Transfer 124(1), 94-101 (Aug 14, 2001) (8 pages) doi:10.1115/1.1421048 History: Received November 27, 2000; Revised August 14, 2001
Copyright © 2002 by ASME
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References

Webb, R. L., 1994, Principles of Enhanced Heat Transfer, chap. 14, John Wiley and Sons, New York.
Newell, T. A., and Shah, R. K., 1999, “Refrigerant Heat Transfer, Pressure Drop, and Void Fraction Effects in Microfin Tubes,” Proceedings of 2nd International Symposium on Two-Phase Flow and Experimentation, Pisa, Italy, Vol. 3, pp. 1623–1639.
Cavallini, A., Doretti, L., Klammsteiner, N., Longo, G. A., and Rosetto, L., 1995, “Condensation of New Refrigerants Inside Smooth and Enhanced Tubes,” Proceedings of 19th International Congress of Refrigeration, Vol. IV, pp. 105–114.
Cavallini,  A., Del Col,  D., Doretti,  L., Longo,  G. A., and Rosetto,  L., 1999, “A New Computational Procedure for Heat Transfer and Pressure Drop during Refrigerant Condensation Inside Enhanced Tubes,” Journal of Enhanced Heat Transfer, 6, No. 1, pp. 441–456.
Shikazono,  N., Itoh,  M., Uchida,  M., Fukushima,  T., and Hatada,  T., 1998, “Predictive Equation Proposal for Condensation Heat Transfer Coefficient of Pure Refrigerants in Horizontal Microfin Tubes,” Transactions of JSME, 64, pp. 196–203.
Kedzierski,  M. A., and Goncalves,  J. M., 1999, “Horizontal Convective Condensation of Alternative Refrigerants Within a Micro-Fin Tube,” Journal of Enhanced Heat Transfer, 6, No. 2–4, pp. 161–178.
Yang,  C. Y., and Webb,  R. L., 1997, “A Predictive Model for Condensation in Small Hydraulic Diameter Tubes Having Axial Microfins,” ASME J. Heat Transfer, 119, No. 4, pp. 776–782.
Nozu,  S., and Honda,  H., 2000, “Condensation of Refrigerants in Horizontal, Spirally Grooved Microfin Tubes: Numerical Analysis of Heat Transfer in Annular Flow Regime,” ASME J. Heat Transfer, 122, No. 1, pp. 80–91.
Taitel,  Y., and Dukler,  A. E., 1976, “A Model for Predicting Flow Regime Transitions in Horizontal and Near Horizontal Gas-Liquid Flow,” AIChE J., 22, No. 1, pp. 47–55.
Carnavos,  T. C., 1980, “Heat Transfer Performance of Internally Finned Tubes in Turbulent Flow,” Heat Transfer Eng., 4, No. 1, pp. 32–37.
Haraguchi, H., 1994, “Studies on Condensation of HCFC-22, HFC-134a and HCFC-123 in Horizontal Tubes,” Dr. Eng. thesis, Kyushu University.
Hayashi, T., 1998, “Enhancement of Condensation of HFC-134a in Horizontal Tubes,” M. Eng. thesis, Kyushu University.
Miyara,  A., Nonaka,  K., and Taniguchi,  M., 2000, “Condensation Heat Transfer and Flow Pattern Inside a Herringbone-Type Microfin Tube,” Int. J. Refrig., 23, No. 1, pp. 141–152; also private communication.
Mclinden, M. O., Klein, S. A., Lemmon, E. W., and Peskin, A. P., 1998, NIST Thermodynamic and Transport Properties of Refrigerants and Refrigerant Mixtures—REFPROP, Version 6.0.
Luu,  M., and Bergle,  A. E., 1980, “Enhancement of Horizontal In-Tube Condensation of Refrigerant-113,” ASHRAE Trans., 86, Pt. 1, pp. 293–312.

Figures

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Physical model and coordinates: (a) tube cross section; (b) A-A cross section; (c) fin cross section (0≤φ≤φf); and (d) fin cross section (φf≤φ≤φs)
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Condensate profiles in fin cross-section (a) and distribution of local heat transfer coefficient (b); Tube C, G=98 kg/m2 s, χ=0.72
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Circumferential distributions of average heat transfer coefficient for fin cross-section (a) and tube wall temperature (b); Tube C, G=98 kg/m2 s, χ=0.72
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Variation of circumferential average heat transfer coefficient with wetness fraction; comparison of measured and predicted values, Tube C
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Comparison of measured and predicted circumferential average heat transfer coefficients
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Comparison of measured and predicted circumferential average heat transfer coefficients
Grahic Jump Location
Comparison of measured and predicted circumferential average heat transfer coefficients
Grahic Jump Location
Comparison of measured and predicted circumferential average heat transfer coefficients
Grahic Jump Location
Comparison of measured and predicted circumferential average heat transfer coefficients
Grahic Jump Location
Comparison of measured and predicted circumferential average heat transfer coefficients
Grahic Jump Location
Comparison of measured and predicted circumferential average heat transfer coefficients

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