Heat Transfer Through Falling Film Evaporation and Boiling on Horizontal Tubes Academic Article uri icon


  • Evaporation and boiling heat transfer coefficients are presented for thin, distilled water films flowing over the outside of horizontal, electrically heated brass tubes. Tests were conducted with a thin-slot water distribution system for 2.54- and 5.08-cm-dia smooth tubes. Both local and average heat transfer data were obtained for nonboiling and boiling conditions corresponding to feedwater temperatures ranging from 49 to 127°C and heat-flux values ranging from 30 to 80 kW/m2. Feed-water flow rates ranged from 0.135 to 0.366 kg/s per meter length per side of the tube. Both nonboiling and boiling correlations of the average heat transfer coefficients were developed and compared.

author list (cited authors)

  • Parken, W. H., Fletcher, L. S., Sernas, V., & Han, J. C.

publication date

  • January 1, 1990 11:11 AM