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TECHNICAL NOTES

An Analytical Model to Predict Condensation of R-410A in a Horizontal Rectangular Channel

[+] Author and Article Information
Z. Guo, N. K. Anand

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Heat Transfer 122(3), 613-620 (Feb 21, 2000) (8 pages) doi:10.1115/1.1286817 History: Received November 14, 1998; Revised February 21, 2000
Copyright © 2000 by ASME
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References

Troniewski,  L., and Ulbrich,  R., 1984, “Two-Phase Gas-Liquid Flow in Rectangular Channels,” Chem. Eng. Sci., 39, No. 4, pp. 751–765.
Wambsganss, M. W., Jendrzejczyk, J. A., France, D. M., and Obot, N. T., 1990, Two-Phase Flow Patterns and Frictional Pressure Gradients in Small, Horizontal, Rectangular Channel,” Argonne National Laboratory, Research Report ANL-90/19, University of Illinois, Chicago, IL.
Wambsganss, M. W., Jendrzejczyk, J. A., France, D. M., and Obot, N. T., 1990, Two-Phase Flow Patterns and Pressure Gradients in a Small Rectangular Channel: A Comparison Between Two Horizontal Orientations,” Argonne National Laboratory, Research Report ANL-90/46, University of Illinois, Chicago, IL.
Guo,  Z., and Anand,  N. K., 1999, “Condensation of R-410A in a Rectangular Channel,” Int. J. HVAC&R Res., 5, pp. 99–123.
Guo, Z., 1998, “Condensation of R-410A in Horizontal Rectangular Channel,” Ph.D. dissertation, Texas A&M University, College Station, TX.
Nusselt,  W., 1916, “Die Oberflachenkondensation des Wasserdampfes,” Z. Vereins Deutsch. Ing., 60, pp. 541–557.
Lockhart,  R. W., and Martinelli,  R. C., 1949, “Proposed Correlation of Data for Isothermal Two-Phase, Two-Component Flow in Pipes,” Chem. Eng. Prog., 45, No. 5, pp. 39–48.
Dobson, M. K., 1994, “Heat Transfer and Flow Regimes During Condensation in Horizontal Tubes,” Ph.D. dissertation, University of Illinois at Urbana-Champaign, Champaign, IL.
Rosson,  H. F., and Myers,  J. A., 1965, “Point Values of Condensing Film Coefficients Inside a Horizontal Pipe,” Chem. Eng. Prog., Symp. Ser., 61, No. 59, pp. 190–199.
Chato,  J. C., 1962, “Laminar Condensation Inside Horizontal and Inclined Tubes,” ASHRAE J., 4, pp. 52–60.
Jaster,  H., and Kosky,  P. G., 1976, “Condensation in a Mixed Flow Regime,” Int. J. Heat Mass Transf., 19, pp. 95–99.
Traviss,  D. P., Rohsenow,  W. M., and Baron,  A. B., 1973 “Forced Convection Condensation in Tubes: A Heat Transfer Correlation for Condenser Design,” ASHRAE Trans., 79, No. 1, pp. 157–165.

Figures

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Model. (a) Idealized schematic of the stratified wavy flow during condensation. (b) A model for calculating heat transfer through the top, the vertical, and the bottom walls. (c) Schematic of the external condensation on a vertical wall modeled by Nusselt 6.
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Condensation along the vertical wall. (a) Schematic for condensation of a flowing vapor on a vertical wall. (b) A control volume and discretization grid on the vertical wall.
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Liquid refrigerant film thickness on the vertical wall due to condensation. (a) G=143.8 kg/s m2. (b) G=178.1 kg/s m2.
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Comparison of the analytically predicted local Nusselt number with the current experimental data for the rectangular channel and the correlations of others for circular tubes. (a) G=73.9 kg/s m2. (b) G=114.2 kg/s m2. (c) G=143.8 kg/s m2. (d) G=178.1 kg/s m2.
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Comparison of the experimental data of Guo 5 with the current analytical predictions

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