Power plants – Utilizing natural heat – Geothermal
Patent
1979-04-02
1980-07-29
Ostrager, Allen M.
Power plants
Utilizing natural heat
Geothermal
60398, F03G 700
Patent
active
042144493
ABSTRACT:
An ocean thermal energy conversion system includes a mass of expandites that change density in response to changes in temperature at a given pressure to thereby change buoyancy with respect to ocean water; a mass transport conduit circuit for introducing the expandites to ocean water at different combinations of temperature and pressure and transporting the expandites and ocean water in response to pressure differentials created by density changes and concomitant buoyancy changes of the expandites as the expandites are exposed to ocean water at different combinations of pressure and temperature; and a transducer such as a turbo-electric generator for converting the pressure of water transported by the circuit to electrical energy. Expandites are defined as separate objects that expand or contract when heated or cooled, thereby changing their density. The disclosed expandites includes substances encased in plastic bags, such as ammonia which expands upon undergoing a phase transformation upon going from a liquid to a gas, and nitro benzene which expands upon undergoing a phase transformation from a liquid to a solid.
REFERENCES:
patent: 3805515 (1974-04-01), Zener
patent: 3967449 (1976-07-01), Beck
patent: 3995160 (1976-11-01), Zener et al.
patent: 4087975 (1978-05-01), Owens
patent: 4104883 (1978-08-01), Naef
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