The design and operation of a geothermal plant are heavily impacted by the phase behavior of the fluids extracted from the subsurface. The phase behavior of the aqueous fluid is a function of its composition and pressure & temperature conditions. Deep geothermal fluids are often highly saline (>6 M) and contain dissolved gases (e.g., CO2, CH4, N2). Any change in pressure and temperature across the geothermal loop will disturb the existing equilibrium conditions, triggering mineral precipitation and gas exsolution until a new equilibrium is achieved. Thus, while at the high pressures within the subsurface the geothermal fluid may be found in a single (liquid) phase, once the fluid is brought to the lower pressures at or near the surface, it may eventually split into two phases (gas/liquid, liquid/solid) or even three phases (solid/liquid/gas). This may also take place in the wellbore. For some geothermal power plants, this is part of the working principle when the geothermal fluid has a sufficiently high temperature, such as the single flash plant, double flash plant . For other types of plants that do not utilize flashing of the geothermal brine, e.g., the binary plant , any flashing is undesired.