Power plants – Combustion products used as motive fluid – With exhaust treatment
Patent
1982-12-27
1985-02-12
Ostrager, Allen M.
Power plants
Combustion products used as motive fluid
With exhaust treatment
60 3904, 60 3917, 60647, F02N 2506
Patent
active
044982895
ABSTRACT:
An improved direct fired power system generating and employing a combustion gas which includes carbon dioxide or a working fluid including a combustion chamber (20) for burning a mixture which includes oxygen, carbonaceous fuel and recycled carbon dioxide working fluid at a first pressure of above 1100 PSI thereby providing a combustion gas which includes carbon dioxide and water at substantially the first pressure and above 31.degree. C. A first turbine (16) allows the gas to expand therethrough to generate power and reduce the combustion gas pressure to a second pressure below 1100 PSI while maintaining gas temperature above 31.degree. C. A second burner (20) heats the combustion gas to a higher temperature and a second turbine (21) allows the gas to expand therethrough to generate power and reduce the pressure to a third pressure while maintaining gas temperature above 31.degree. C. A heat exchanger (26) includes ducts (28), (30) in heat exchange relationship. Duct (30) conducts recycled carbon dioxide working fluid at substantially the first pressure therethrough and to the combustion chamber. Duct (28) conducts combustion gas from turbine (21) therethrough to transfer heat to the recycled carbon dioxide working fluid to condense at least a portion of the water in the combustion gas but maintain the carbon dioxide thereof in a gaseous phase. Condensed water is separated from the gas. A condensor (33) cools the gas to a first temperature above 31.degree. C. and a compressor (42) compresses the gas to a fourth pressure of at least 1100 psi but below the first pressure. A second condensor (44) cools the gas to a second temperature below the first temperature but above 31.degree. C. and a second compressor (24) compresses the gas to substantially the first pressure to provide recycled carbon dioxide working fluid which is delivered to heat exchanger (26).
REFERENCES:
patent: 3736745 (1973-06-01), Karig
patent: 4148185 (1979-04-01), Somers
Cohen Jerry
Oliverio M. Lawrence
Ostrager Allen M.
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