Flash steam plants are the most common type of geothermal power generation plants in operation today. Fluid at temperatures greater than 360¡F (182¡C) is pumped under high pressure into a tank at the surface held at a much lower pressure, causing some of the fluid to rapidly vaporize, or "flash." The vapor then drives a turbine, which drives a generator. If any liquid remains in the tank, it can be flashed again in a second tank to extract even more energy.
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