초록 ▼

Power is produced from geothermal fluid containing non-condensable gases whose main constituent is carbon-dioxide. The geothermal fluid is separated into steam and geothermal liquid, the steam being applied to a steam turbine which produces power. The steam exiting the turbine indirectly condensed b

Power is produced from geothermal fluid containing non-condensable gases whose main constituent is carbon-dioxide. The geothermal fluid is separated into steam and geothermal liquid, the steam being applied to a steam turbine which produces power. The steam exiting the turbine indirectly condensed by an organic fluid liquid which is vaporized and used to run at least one organic vapor turbine for producing power. Organic vapor exiting the organic vapor turbine is condensed and preheated by the steam condensate. Heat extracted from the geothermal liquid is used to run another organic vapor turbine producing power and cooled geothermal liquid which is combined with the cooled steam condensate to form a mixture to which the non-condensable gases are added to form an effluent that is injected into a re-injection well. Carbon dioxide in the non-condensable gases substantially dissolves in the geothermal liquid cooled by the cooled steam condensate reducing the pH of the effluent and thus reducing mineral scale precipitation.

대표청구항 ▼

A method for producing power from geothermal fluid containing non-condensable gases that include carbon dioxide, said method comprising: a) separating the geothermal fluid into geothermal steam and geothermal liquid; b) expanding said steam for producing power and lower pressure steam, condensing sa

A method for producing power from geothermal fluid containing non-condensable gases that include carbon dioxide, said method comprising: a) separating the geothermal fluid into geothermal steam and geothermal liquid; b) expanding said steam for producing power and lower pressure steam, condensing said lower pressure steam in a steam condenser using an organic fluid for producing steam condensate and vaporized organic fluid vapor; c) extracting non-condensable gases from said steam condenser and compressing said non-condensable gases; d) expanding said organic fluid vapor for producing power and lower pressure organic fluid vapor, condensing said lower pressure organic fluid vapor for producing organic fluid condensate, preheating said organic fluid condensate with said steam condensate for producing cooled steam condensate and preheated organic fluid, and supplying the preheated organic fluid to said steam condenser; e) supplying said geothermal liquid to a heat exchanger containing additional organic fluid for producing additional organic fluid vapor as well as cooled geothermal liquid; f) expanding said additional organic fluid vapor for producing power and lower pressure additional organic fluid vapor, condensing said lower pressure additional organic fluid vapor for producing additional organic fluid condensate, and supplying said additional organic fluid condensate to said heat exchanger; g) introducing the compressed non-condensable gases into said cooled geothermal liquid for forming geothermal liquid effluent; and h) disposing of said geothermal liquid effluent.