System and method for high efficiency power generation using a carbon dioxide circulating working fluid
Assignee8 Rivers Capital, LLC
InventorsRodney John Allam, Glenn William Brown, Jr., Miles R. Palmer
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Abstract
The present invention provides methods and system for power generation using a high efficiency combustor in combination with a CO2 circulating fluid. The methods and systems advantageously can make use of a low pressure ratio power turbine and an economizer heat exchanger in specific embodiments. Additional low grade heat from an external source can be used to provide part of an amount of heat needed for heating the recycle CO2 circulating fluid. Fuel derived CO2 can be captured and delivered at pipeline pressure. Other impurities can be captured.
Claims11
A power generation system comprising:
- a combustor configured for receiving a fuel, O2, and a CO2 stream, and for combusting the fuel to provide a combustion product stream comprising CO2 at a pressure of at least 8 MPa and a temperature of at least 800° C.;
- a turbine configured to receive the combustion product stream from the combustor, expand the combustion product stream, and provide a turbine discharge stream comprising CO2;
- a recuperator heat exchanger configured to receive and withdraw heat from the turbine discharge stream and to transfer at least a portion of the withdrawn heat to the CO2 stream;
- a first compressor upstream from the combustor configured to pressurize the CO2 stream to a pressure of at least 8 MPa;
- one or more heat transfer components configured to transfer heat from a further heat source to the pressurized CO2 stream upstream from the combustor and downstream from the first compressor, wherein the heat from the further heat source is not derived directly from the turbine discharge stream;
- a secondary heat exchange unit located between and in fluid communication with the turbine and the recuperator heat exchanger;
- and
- a boiler in fluid communication with the secondary heat exchange unit via at least one steam stream.
Dependencies are inferred from the claim text.