Flow Boiling in Horizontal Tubes: Part 1—Development of a Diabatic Two-Phase Flow Pattern Map

Author:

Kattan N.1,Thome J. R.1,Favrat D.1

Affiliation:

1. Laboratory for Industrial Energy Systems, Department of Mechanical Engineering, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland

Abstract

An improved two-phase flow pattern map is proposed for evaporation in horizontal tubes. The new map was developed based on flow pattern data for five different refrigerants covering a wide range of mass velocities and vapor qualities. The new map is valid for both adiabatic and diabatic (evaporating) flows and accurately identifies about 96 percent of the 702 data points. In addition, the new flow pattern map includes the prediction of the onset of dryout at the top of the tube during evaporation inside horizontal tubes as a function of heat flux and flow parameters.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference15 articles.

1. Auracher, H., Drescher, G., Hein, D., Katsaounis, A., Kefer, V., Ko¨hler, W., and Ulrych, G., 1993, “Critical Boiling States in Flowing Liquids,” VDI-Wa¨rmeatlas (VDI Heat Atlas), Verein Deutscher Ingenieure, VDI-Gessellschaft Verfahrenstechnik und Chemieingenieurwesen (GCV), Du¨sseldorf, Germany, (J. W. Fullarton, translator).

2. Collier, J. G., and Thome, J. R., 1994, Connective Boiling and Condensation, 3rd Edition, Oxford University Press, Oxford.

3. Gungor K. E. , and WintertonR. H. S., 1986, “A General Correlation for Flow Boiling in Tubes and Annuli,” Int. J. Heat Mass Transfer, Vol. 29, No. 3, pp. 351–358.

4. Gungor K. E. , and WintertonR. H. S., 1987, “Simplified General Correlation for Saturated Flow Boiling and Comparison of Correlations to Data,” Chem. Eng. Res. Des, Vol. 65, pp. 148–156.

5. Hashizume K. , 1983, “Flow Pattern and Void Fraction of Refrigerant Two-Phase Flow in a Horizontal Pipe,” Bulletin of JSME, Vol. 26, No. 219, pp. 1597–1602.

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