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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Pressure Drop During Refrigerant Condensation Inside Horizontal Smooth, Helical Microfin, and Herringbone Microfin Tubes

[+] Author and Article Information
Jonathan A. Olivier, Leon Liebenberg, Josua P. Meyer

Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, 0002, South Africa

Mark A. Kedzierski

National Institute of Standards and Technology, Gaithersburg, MD

J. Heat Transfer 126(5), 687-696 (Nov 16, 2004) (10 pages) doi:10.1115/1.1795240 History: Received November 19, 2003; Revised June 15, 2004; Online November 16, 2004
Copyright © 2004 by ASME
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References

Liebenberg, L., 2002, “A Unified Prediction Method for Condensation Performance in Smooth and Microfin Tubes,” Ph.D. thesis, Rand Afrikaans University, Johannesburg.
Miyara,  A., Otsubo,  Y., Ohtsuka,  S., and Mizuta,  Y., 2003, “Effects of Fin Shape on Condensation in Herringbone Microfin Tubes,” Int. J. Refrig., 26, pp. 417–424.
Ebisu,  T., and Torikoshi,  K., 1998, “Experimental Study on Evaporation and Condensation Heat Transfer Enhancement for R-407C Using Herringbone Heat Transfer Tube,” ASHRAE Trans., 104(2), pp. 1044–1052.
Miyara,  A., Nonaka,  K., and Taniguchi,  M., 2000, “Condensation Heat Transfer and Flow Pattern Inside a Herringbone-Type Microfin Tube,” Int. J. Refrig., 23, pp. 141–152.
Goto,  N., Inoue,  N., and Ishiwatari,  N., 2001, “Condensation and Evaporation Heat Transfer of R-410A inside Internally Grooved Horizontal Tubes,” Int. J. Refrig., 24, pp. 628–638.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
REFPROP, 1999, “NIST Thermodynamic Properties of Refrigerants and Refrigerant Mixtures (REFPROP),” Version 6.0, NIST Standard Reference Database 23, National Institute of Standards and Technology, Gaithersburg, MD.
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Cavallini,  A., Del Col,  D., Doretti,  L., Longo,  G. A., and Rossetto,  L., 2000, “Heat Transfer and Pressure Drop During Condensation of Refrigerants Inside Horizontal Enhanced Tubes,” Int. J. Refrig., 23, pp. 4–25.
Owaga, D. C., 2003, “Flow Patterns during Refrigerant Condensation in Smooth and Enhanced Tubes,” Master’s dissertation, Rand Afrikaans University, Johannesburg.
Liebenberg, L., Thome, J. R., and Meyer, J. P., 2004, “Flow Pattern Identification With Power Spectral Density Distributions of Pressure Traces During Refrigerant Condensation in Smooth and Microfin Tubes,” ASME J. Heat Transfer, submitted for review.
Wang,  J., Lan,  S., and Chen,  G., 2000, “Experimental Study on the Turbulent Boundary Layer Flow Over Riblets Surface,” Fluid Dyn., 27(4), pp. 217–229.
Carnavos,  T. C., 1980, “Heat Transfer Performance of Internally Finned Tubes in Turbulent Flow,” Heat Transfer Eng., 4(1), pp. 32–37.
Souza, A. L., and Pimenta, M. M., 1995, “Prediction of Pressure Drop During Horizontal Two-Phase Flow of Pure and Mixed Refrigerants,” ASME Conference on Cavitation and Multiphase Flow, ASME, New York, Vol. 210, pp. 161–171.
Friedel, L., 1979, “Improved Friction Pressure Drop Correlation for Horizontal and Vertical Two-phase Two-component Flow in Pipes,” E2, European Two-Phase Flow Group Meeting, Ispra.
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Haraguchi,  H., Koyama,  S., and Fujii,  T., 1994, “Condensation of Refrigerants HCFC22, HFC134a and HCFC123 in a Horizontal Smooth Tube: 1st Report, Proposals of Empirical Expressions for the Local Frictional Pressure Drop,” Trans. JSME, 60, pp. 2111–2116.

Figures

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a) Basic geometry of the herringbone microfin tube (not to scale) and b) an illustration of how condensate is distributed inside the tube for the adopted orientation (exaggerated)
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Schematic of the experimental facility
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Determining the transition qualities by making use of a) the Thome 9 map for the smooth tube, and the method used by Liebenberg et al. 13 for b) the helical microfin tube and c) the herringbone microfin tube
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Pressure gradients at mass fluxes of 400, 600, and 800 kg/m2 s for the three tubes and refrigerants tested
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Average pressure drops of the experimental data and that predicted by Miyara et al. 4 and the newly developed correlation for refrigerants R-22, R-407C, and R-134a
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Penalty factors for the herringbone microfin tube against a) the smooth tube and b) the helical microfin tube for R-22, R-407C, and R-134a
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Comparison of the experimental data with the modified prediction data for R-22, R-407C and R-134a

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