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US 9,869,245 B2Granted
System and method for high efficiency power generation using a carbon dioxide circulating working fluid
Assignee8 Rivers Capital, LLC
InventorsRodney John Allam, Miles R. Palmer, Glenn William Brown, Jr.
Life of this patent
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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.
Claims13
A power generation system comprising:
- a combustor configured for receiving a fuel, O2, and a CO2 stream, and having at least one combustion stage that combusts the fuel in presence of the CO2 stream and provides a combustion product stream comprising CO2 at a pressure of at least about 8 MPa and a temperature of at least about 800° C.;
- a first power production turbine and a second power production turbine in series downstream from the combustor and configured for output of a turbine discharge stream comprising CO2;
- a heat exchanger configured for receiving the turbine discharge stream from the second power production turbine and transferring heat therefrom to the CO2 stream;
- and
- one or more separation devices downstream from the heat exchanger and configured to remove one or more components from the turbine discharge stream and output the CO2 stream;
- at least one compressor configured for pressurizing the CO2 stream;
- and
- at least one heat transfer component in addition to the heat exchanger, the at least one heat transfer component configured for transferring heat from a source other than the turbine discharge stream to the CO2 stream upstream from the combustor and downstream from the at least one compressor.
5 more elements
A power generation system comprising:
- a first combustor;
- a first turbine;
- a second combustor;
- a second turbine;
- a compressor;
- a heat exchanger configured for transferring neat from a discharge stream exiting the second turbine to a CO2 stream exiting the compressor, the heat exchanger having:
- a first inlet in a working arrangement with an outlet of the second turbine;
- a first outlet in a working arrangement with an inlet of the compressor;
- a second inlet in a working arrangement with an outlet of the compressor;
- and
- a second outlet in a working arrangement with an inlet of the first combustor;
- and
- at least one heat transfer component in addition to the heat exchanger, the at least one heat transfer component configured for transferring heat from a source other than the discharge stream exiting the second turbine to the CO2, stream upstream from the first combustor and downstream from the compressor.
10 more elements
A method of power generation comprising:
- expanding a CO2-containing stream that has a pressure of at least about 12 MPa and a temperature of at least about 750° C. across a series of a first turbine and a last turbine so as to output from the last turbine a last turbine discharge stream comprising CO2;
- passing the last turbine discharge stream though a recuperator heat exchanger to withdraw heat therefrom as a first heat source and form a cooled turbine discharge stream;
- isolating at least a portion of the CO2 from the cooled turbine discharge stream to form a recycle CO2 stream;
- compressing the recycle CO2 stream to a pressure of at least about 12 MPa to form a compressed recycle CO2 stream;
- heating at least a portion of the compressed recycle CO2 stream with the first heat source that is the heat withdrawn from the last turbine discharge stream, said heating with the first heat source being done by passing the compressed recycle CO2 stream through the recuperator heat exchanger, and heating at least a portion of the compressed recycle CO2 stream with heat from a second heat source that is a source other than the heat withdrawn from the last turbine discharge stream such that a heated, compressed recycle CO2 stream that has been heated with the first heat source and the second heat source is output from the recuperator heat exchanger;
- passing the heated, compressed recycle CO2 stream from the recuperator heat exchanger to a combustor wherein a fuel is combusted to further heat the heated, compressed recycle CO2 stream so as to form the CO2-containing stream;
- and
- passing the CO2-containing stream to the first turbine in the series.
5 more elements
Dependencies are inferred from the claim text.