Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1977-12-09
1979-04-17
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60641, 60649, F01K 2506, F03G 700
Patent
active
041493850
ABSTRACT:
The flow from geothermal wells is stimulated by injecting a liquid at selected levels in the well with the liquid having a boiling point below the temperature of the geothermal fluid at the levels of injection at the operating pressure at the levels of injection. The geothermal fluid and vaporized injected fluid from the well are applied to a system for extracting the heat energy as well as for cleaning sand and other well depositions that may accumulate in the geothermal well. The system may include a direct contact heat exchanger having either a vertical chamber or a horizontal chamber. The contactor has a plurality of zones including a boiler zone, one or more separation zones, and at least one heat exchange zone. The contactor may also include a wash zone and a flash zone.
In the wash zone there is advantageously included recirculation trays vertically spaced for washing the vapor to remove entrained substances, such as minerals dissolved in the fluid from the geothermal wells. The recirculation trays include a manway for ease of access and service. The vaporized fluids from the contactor are passed through a power extracting gas expansion device, with the composition of the vapor being controlled to maximize the power extractable by the gas expansion device.
REFERENCES:
patent: 3722211 (1973-03-01), Conner et al.
patent: 3841099 (1974-10-01), Somekh
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