Carbon dioxide power cycle

Patent · Tue Feb 12 00:00:00 EST 1985

OSTI ID:5687015

Osgerby, I

An improved direct fired power system generating and employing a combustion gas which includes carbon dioxide or a working fluid including a combustion chamber 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/sup 0/ C. A first turbine 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/sup 0/ C. A second burner heats the combustion gas to a higher temperature and a second turbine allows the gas to expand therethrough to generate power and reduce the pressure to a third pressure while maintaining gas temperature above 31/sup 0/ C. A heat exchanger includes ducts in heat exchange relationship. Duct conducts recycled carbon dioxide working fluid at substantially the first pressure therethrough and to the combustion chamber. Duct conducts combustion gas from turbine 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 cools the gas to a first temperature above 31/sup 0/ C. and a compressor compresses the gas to a fourth pressure of at least 1100 psi but below the first pressure. A second condensor cools the gas to a second temperature below the first temperature but above 31/sup 0/ C. and a second compressor compresses the gas to substantially the first pressure to provide recycled carbon dioxide working fluid which is delivered to heat exchanger.

• Assignee: EDB-85-115207
• Patent Number(s): US 4498289
• OSTI ID: 5687015
• Resource Relation: Patent File Date: Filed date 27 Dec 1982; Other Information: PAT-APPL-453724
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
POWER SYSTEMS
THERMODYNAMIC CYCLES
CARBON DIOXIDE
COMBUSTION CHAMBERS
CONDENSERS
GAS COMPRESSORS
GAS TURBINES
HEAT EXCHANGERS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COMPRESSORS
ENERGY SYSTEMS
MACHINERY
OXIDES
OXYGEN COMPOUNDS
TURBINES
TURBOMACHINERY
425007* - Engineering- Power Cycles- Other- (1980-)