Ocean thermal energy conversion system and method for operation

Power plants – Utilizing natural heat – Geothermal

Patent

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Details

60646, 60686, 60689, F03G 704

Patent

active

041899245

ABSTRACT:
A power generation system and method of operation for generating electricity by utilizing temperature differences inherently present in the ocean between water near the surface and water from the ocean's depths. A pump provides relatively warm, surface ocean water to a flash evaporator where a portion of the water is flashed into steam. The steam is expanded through a subatmospheric pressure range turbine which exhausts into a condensing enclosure. The steam exhausting into the enclosure is condensed by relatively cold ocean water pumped thereinto. The turbine drives a generator and thus produces the electricity. The turbine speed and generator output are controlled by selectively introducing atmospheric air and relatively warm water into the exhausted motive steam flow. Such selective introduction into the exhausted steam flow of air and/or relatively warm water increases the absolute pressure at the turbine's exhaust end and thus reduces steam flow through the turbine. Adjusting regulating valves for the air and warm water flows in response to changes in turbine speed and/or generator load provides means for regulating the speed of the turbine and generating load.

REFERENCES:
patent: 879121 (1908-02-01), Robinson
patent: 1584758 (1926-05-01), Ehrhart
patent: 2409024 (1946-10-01), Dornbrook
patent: 2997283 (1961-08-01), Seglem
patent: 3750395 (1973-08-01), Tapper et al.
patent: 4080790 (1978-03-01), Oberle
patent: 4087975 (1978-05-01), Owens

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