A production well is drilled into a known geothermal reservoir. Typically, an injection well is also drilled to return used geothermal fluids to the geothermal reservoir. Hot, pressurized geothermal fluid, or a secondary working fluid, is allowed to expand rapidly and provide rotational or mechanical energy to turn the turbine blades on a shaft. Rotational energy from the turning turbine shaft is used directly to spin magnets inside a large coil and create electrical current. The turbine and generator are the primary pieces of equipment used to convert geothermal energy to electrical energy.
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