Pressure oscillation and a new method to calculate the heat transfer coefficient for steam jet condensation

The pressure oscillation and heat transfer are two important aspects for direct contact condensation. Both of them have been investigated within the steam mass flux 441-865 kg/(m2 s) and water temperature 293-343 K in this paper. The frequency of pressure oscillation decreases with the increasing steam mass flux and water temperature. While, the frequency first increases then subsequently decreases with the decreasing pressure ratio of the nozzle. The heat transfer coefficient has the same variation regularities with the frequency of pressure oscillation. Two dimensionless quantity of frequency of pressure oscillation and heat transfer coefficient have been obtained, the dimensionless heat transfer coefficient is proportional to the dimensionless frequency of pressure oscillation. A new simpler method to calculate the heat transfer coefficient for steam jet condensation has been given. The errors between the predicted values and experimental data are within −30% to 25%.