Power plants – Utilizing natural heat – Geothermal
Patent
1995-05-03
1996-12-10
Gromada, Denise L.
Power plants
Utilizing natural heat
Geothermal
60652, 60655, F03G 406
Patent
active
055820115
ABSTRACT:
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.
REFERENCES:
patent: 4417446 (1983-11-01), Nakamoto et al.
patent: 4542625 (1985-09-01), Bronicki
patent: 5038567 (1991-08-01), Moritz
Batsha Dan
Bronicki Lucien Y.
Basichas Alfred
Gromada Denise L.
Ormat Industries Ltd.
Sandler Donald M.
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