POST-CHF HEAT-TRANSFER WITH WATER AND REFRIGERANTS

Heat transfer experiments were performed in the post-CHF two-phase flo w regime in a vertical tube. The tube inside diameter was 7.75 mm, and the boiling fluid was R-113. The experiments were performed at steady stale by means of liquid heating of the test tube. Wall superheats we re maintained below 70 degrees C for heat exchanger/steam generator ap plication. The mass flux range of the data was 379-816 kg m(-2) s(-1). The use of R-113 significantly extended the property range of the exi sting low wall-superheat data base. Experimental data are presented in tabular as well as graphical form, and the results were used with low wall-superheat data from other fluids to add generality to a predicti ve heat transfer correlation.