Method of and apparatus for retrofitting geothermal power plants
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United States of America Patent
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Mar 5, 1991
Grant Date -
N/A
app pub date -
Feb 12, 1990
filing date -
Feb 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An existing geothermal power plant, utilizing geothermal steam from a production well in a geothermal field to drive a multi-stage steam turbine when the available steam pressure from the production well for rated mass for steam through the turbine is less than the design pressure of the turbine, is retrofitted by increasing the mass flow of steam from the production well by an incremental amount. Substantially all of the incremental amount of steam is diverted to an organic fluid Rankine cycle power plant for converting heat in the diverted steam to power and producing waste fluid in the form of steam condensate and non-condensable gases. The waste fluid is injected into a reinjection well in the geothermal field. Preferably, the non-diverted portion of steam is applied to the steam turbine and an intermediate stage of the turbine where the design pressure of the stage matches the steam pressure of the applied steam.
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