A New Approach for the Modelization of Water and Steam Mixing at High Pressure Conditions

In the present paper a zero-dimensional thermodynamic model of liquid water and steam mixing is presented. The model provides the temperature distribution during the mixing process, as an exponential function of time. A comparison with experimental data is performed, showing an excellent agreement. In the experimental set up, steam from an adiabatic high pressure storage is mixed, in a mixing chamber, together with liquid water. Measures of the temperature both on the inner and outer surface of the mixing chamber are taken. A comparison between the experimental data and the thermodynamic model proposed shows that the heat transfer between the mixing chamber and the environment is negligible. Moreover, a discussion on the time dependency of the experimental pressure and of the theoretical internal energy of the steam is presented.