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Home Archives Thermal Letter Officers Future meetings Assembly for International Heat Transfer Conferences

ISBN : 0-89116-299-2

International Heat Transfer Conference 7
1982, 6-10 September, Munich, Germany

PRESSURE DROP FOR CONDENSATION OF A PURE VAPOUR IN DOWN FLOW IN A VERTICAL TUBE

DOI: 10.1615/IHTC7.510
pages 139-145

Abstract

Experimental data for the pressure drop of a pure condensing vapour in a vertical tube are compared with the predictions of an annular flow model. The comparisons are made using data obtained by the authors and using further data obtained from other sources. The data span a mass flux range from 0 to 1000 kg/m2s and a tube diameter range from 7.5 to 25.4 mm. The experimental data are for the condensation of steam, methanol, refrigerant 113, refrigerant 11, refrigerant 21 and refrigerant 114. It is found that the predictions of the annular flow model are sensitive to the form of the interfacial roughness correlation employed in the model. Of two interfacial roughness correlations tested, neither was able to predict accurately all the data.