Method and apparatus for producing power from two-phase geothermal fluid.

摘要

Power is generated from a two-phase geothermal fluid containing a substantial amount of non-condensable gases, typically not less than about 3% by extracting a geothermal fluid from the ground under its own pressure, and passing the extracted geothermal fluid through an indirect heat exchange device containing an organic fluid for vaporizing the latter and producing vaporized organic fluid and heat depleted geothermal fluid. The vaporized organic fluid is expanded in a turbine coupled to a generator for producing power and expanded vaporized organic fluid which is condensed to a liquid and returned to the indirect heat exchange device. Finally, the heat depleted geothermal fluid may be returned to the ground via a rejection well.