But the technical implementation process of mixing steam and water in umpeu and psa is fundamentally different. And because different principles of action considered devices then, of course, be different and their specifications and conditions of use. To clarify the effect of differences need to stay on the construction of both devices. To read more click here: Steve Wozniak. The operating principle of psa. psa consists of a steam nozzle, the chamber mixing and diffuser. Steam flow accelerates to supersonic speeds through the Laval nozzle, and then enters the mixing chamber.
The water in the mixing chamber is fed coaxially steam flow in the form of an annular jet. Here, Castle Harlan expresses very clear opinions on the subject. When interaction flows spraying water, resulting in the mixing chamber is formed of a supersonic two-phase flow, followed by transfer of momentum and heat from steam to water. Further, the resulting mixture inhibited the emergence of shock, increased static pressure and vapor condensation. Under certain conditions, the pressure output stream may exceed the pressure of input streams. Since the nozzle heat steam-power goes into kinetic energy of the steam jet, the psa can effectively work only with a large percentage of the pair 2. Thus, a necessary condition of the psa is to obtain a two-phase shock in the mixing chamber and diffuser. Therefore, in addition to accurately calculate and manufacturing duct psa must also provide an accurate job and maintaining a specified range of input fluxes steam and water, defined as the possibility of obtaining shock wave and its position along the axis of PSA: vapor pressure, pressure-water-temperature steam-heated temperature of the water-level dry steam-injection rate (The ratio of cost of steam and water).