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US 11,674,436 B2Granted
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.
Claims20
A method comprising:
- compressing a stream comprising carbon dioxide to a pressure of at least about 8 MPa to form a stream of compressed carbon dioxide;
- delivering at least a portion of the compressed carbon dioxide to a combustor;
- delivering an oxidant to the combustor;
- delivering a fuel to the combustor;
- combusting the fuel in the combustor with the oxidant in the presence of the compressed carbon dioxide to form a combustion exhaust stream at a pressure of at least about 8 MPa;
- and
- expanding the combustion exhaust stream across a turbine to generate power and form an expanded combustion exhaust stream;
- wherein the compressed carbon dioxide, the oxidant, and the fuel are delivered to the combustor in ratios such that the combustion exhaust stream comprises an excess of oxygen.
5 more elements
Dependencies are inferred from the claim text.