Keywords: Geothermal Hot Water System.svg en Diagram showing how electricity is generated from a hot-water hydrothermal system The part of the hydrothermal water that flashes to steam is separated and used to drive a turbine generator Wastewater from separator and condenser is injected back into the subsurface to help extend the useful life of the hydrothermal system <br /> Key 1 Wellheads 2 Ground surface 3 Generator 4 Turbine 5 Condenser 6 Separator 2004 http //pubs usgs gov/circ/2004/c1249/ USGS Circular 1249 2004 p11 Wendell A Duffield John H Sass PD-USGov Uploaded with UploadWizard United States Geological Survey Geothermal power plant schemas |