Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

STUDY ON DRY-OUT HEAT FLUX OF TWO-PHASE NATURAL CIRCULATION

Get access (open in a dialog) DOI: 10.1615/IHTC10.1330
pages 485-490

Résumé

Boiling heat transfer experiments were conducted to examine dry-out phenomena in a two-phase natural circulation system of R—113. This work followed closed two-phase thermosiphon experiments and was performed with the same heating sections. The dry-out heat fluxes were much higher than those of the closed thermosiphons. The results showed that the dry-out heat flux rose as the circulation flow rate increased, and was little affected by the heating surface configuration. The dry-out was observed near the exit end of the heating section under an annular flow state. Relation between the dry-out heat flux and the liquid film flow rate is analyzed and a correlation to predict the dry-out heat flux is proposed based upon the present results and the data for forced upflow boiling.