| Abstract: | The relation between the maximum heat transfer coefficient and the saturation temperature of vapor for water flash evaporation under low‐pressure conditions is theoretically analyzed. The optimum evaporation time is introduced by analytical consideration to reflect the experimental result of the linearity of the super heat flux and the unknown constant included in the optimum evaporation time is determined by the experiment. The analytical result is compared with experimental data and shows a good agreement. The analysis also gives information regarding the optimum spray condition among the spray flow rate, particle diameter, and the intermittent spray time to achieve the maximum heat transfer coefficient under low‐pressure conditions. © 1999 Scripta Technica, Heat Trans Asian Res, 29(1): 22–33, 2000 |
