Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

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

POST-DRYOUT HEAT TRANSFER FOR STEAM/WATER FLOWING IN VERTICAL TUBES AT HIGH PRESSURE

Get access (open in a dialog) DOI: 10.1615/IHTC7.1200
pages 351-356

Abstrakt

Post-dryout heat transfer measurements for steam/water flowing in a vertical uniformly heated tube with internal diameter 19mm have been obtained in tests carried out on the MEL Boiling Water Rig in a programme of work to study critical heat flux. Test conditions covered pressures 140 to 180 bars and mass flux 400 - 2250 kg/(m2 s). The ranges of heat flux and steam quality over which heat transfer data were obtained lay within the limits 0.2 to 0.7 MW/ m2 and 0.2 to 0.95 respectively. The data have been compared with widely used post-dry-out correlations available in the literature. The results show large differences between the various predictions and emphasise the dangers of using any of the correlations outside the range of data used in its derivation. Good agreement with the data was obtained over most conditions by use of the Groeneveld-Delorme correlation which is based on a correlation for thermal non-equilibrium in the steam.