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Method of and apparatus for generating power from geothermal fluid containing a relatively high concentration of non-condensable gases
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5582011 METHOD OF AND APPARATUS FOR GENERATING POWER FROM GEOTHERMAL FLUID CONTAINING A RELATIVELY HIGH CONCENTRATION OF NON-CONDENSABLE GASES Bronicki Lucien Y; Batsha Dan assigned to Ormat Industries Ltd
Yavne, ISRAEL
A power plant operating on geothermal steam containing more than about 5% non-condensable gases includes a topping steam turbine for expanding the steam to produce power and from which exhaust steam is extracted at a pressure above atmospheric pressure, and an indirect contact heat exchanger containing clean water for condensing the exhaust steam at a pressure above atmospheric pressure to produce geothermal steam condensate, and for consequently vaporizing the clean water to produce clean steam. The non-condensable gases contained in the geothermal steam are extracted from the heat exchanger and, being at a pressure above atmospheric pressure, can be injected, without being further pressurized, directly into the ground. The clean steam produced by the heat exchanger is applied to a bottoming steam turbine which expands the clean steam to produce power and from which clean exhaust steam is extracted. A condenser operating at sub-atmospheric pressure condenses the clean steam to produce clean condensate which is returned to the heat exchanger by a cycle pump.
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exiting the turbine inditectly 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.
5623986 ADVANCED IN-GROUND/IN-WATER HEAT EXCHANGE UNIT Wiggs B Ryland FrankIin, TN, UNITED STATES
5598706 METHOD OF AND MEANS FOR PRODIjCING POWER FROM GEOTHERMAL FLUID Bronicki Lucien Y; Grassiani Moshe; Amir Nadav Yavne, ISRAEL assigned to Ormat Industries Ltd Power is produced from geothermal fluid containing non-condensable gases whose main constituent is carbon-dioxide. The geodnz4 fluid is separated into steam and geothamal liquid. the steam being applied to a steam turbine which produces power. The steam
A geothermal heat exchange unit, which can be placed in ground or in water, having a hollow sleeve about which a helical winding of thermally conductive tubing is wound and a return length of thermally conductive tubing along the central axis of the sleeve separated from the hmer wag of the sleeve by thermal insulating material. The heat exchange unit may be housed within a thermally conductive case with a thermally conductive material filling the gap between theimrerwailofthecaseandthethermallyco&uctive tubing surroumhng the sleeve of the heat exchange unit. The thermaUy conductive case may have at least one set of helical fins which act as threads for ground insertion assistance. The heat exchange units may be combined to form greater lengths and be combined in series or parallel connection for greater efficiency.
5582011 METHOD OF AND APPARATUS FOR GENERATING POWER FROM GEOTHERMAL FLUID CONTAINING A RELATIVELY HIGH CONCENTRATION OF NON-CONDENSABLE GASES Bronicki Lucien Y; Batsha Dan assigned to Ormat Industries Ltd
Yavne, ISRAEL
A power plant operating on geothermal steam containing more than about 5% non-condensable gases includes a topping steam turbine for expanding the steam to produce power and from which exhaust steam is extracted at a pressure above atmospheric pressure, and an indirect contact heat exchanger containing clean water for condensing the exhaust steam at a pressure above atmospheric pressure to produce geothermal steam condensate, and for consequently vaporizing the clean water to produce clean steam. The non-condensable gases contained in the geothermal steam are extracted from the heat exchanger and, being at a pressure above atmospheric pressure, can be injected, without being further pressurized, directly into the ground. The clean steam produced by the heat exchanger is applied to a bottoming steam turbine which expands the clean steam to produce power and from which clean exhaust steam is extracted. A condenser operating at sub-atmospheric pressure condenses the clean steam to produce clean condensate which is returned to the heat exchanger by a cycle pump.
725
exiting the turbine inditectly 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.
5623986 ADVANCED IN-GROUND/IN-WATER HEAT EXCHANGE UNIT Wiggs B Ryland FrankIin, TN, UNITED STATES
5598706 METHOD OF AND MEANS FOR PRODIjCING POWER FROM GEOTHERMAL FLUID Bronicki Lucien Y; Grassiani Moshe; Amir Nadav Yavne, ISRAEL assigned to Ormat Industries Ltd Power is produced from geothermal fluid containing non-condensable gases whose main constituent is carbon-dioxide. The geodnz4 fluid is separated into steam and geothamal liquid. the steam being applied to a steam turbine which produces power. The steam
A geothermal heat exchange unit, which can be placed in ground or in water, having a hollow sleeve about which a helical winding of thermally conductive tubing is wound and a return length of thermally conductive tubing along the central axis of the sleeve separated from the hmer wag of the sleeve by thermal insulating material. The heat exchange unit may be housed within a thermally conductive case with a thermally conductive material filling the gap between theimrerwailofthecaseandthethermallyco&uctive tubing surroumhng the sleeve of the heat exchange unit. The thermaUy conductive case may have at least one set of helical fins which act as threads for ground insertion assistance. The heat exchange units may be combined to form greater lengths and be combined in series or parallel connection for greater efficiency.