Power plants – Utilizing natural heat – Geothermal
Patent
1980-03-21
1982-11-09
Ostrager, Allen M.
Power plants
Utilizing natural heat
Geothermal
606413, F03G 700
Patent
active
043578020
ABSTRACT:
Process for recovery of energy from geothermal fluids such as geothermal brine in a geothermal formation by injecting a water immiscible working fluid, preferably organic, typically a hydrocarbon, e.g. isobutane, into the geothermal formation containing a geothermal fluid such as hot brine, wherein the hydrocarbon working fluid is heated by direct heat exchange contact with the hot geothermal fluid in the formation, and employing the hot working fluid to drive a heat engine or turbine to produce work or electrical energy or to provide heat energy to a chemical process (e.g., alcohol manufacture). The cooled working fluid discharged from the turbine is reinjected into the geothermal formation. The working fluid preferably has a density which changes substantially with temperature to provide a substantial pressure difference for causing flow of heated working fluid up the production well. The density difference can be due to phase transfer from liquid to gas.
REFERENCES:
patent: 3827243 (1974-08-01), Paull et al.
patent: 3864917 (1975-02-01), Jacoby
patent: 4060988 (1977-12-01), Arnold
patent: 4079590 (1978-03-01), Sheinbaum
Boucher Frederic B.
Wahl, III Edward F.
Bisson Barry
Geldin Max
Husar Stephen F.
Occidental Petroleum Corporation
Ostrager Allen M.
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