System and method for high efficiency power generation using a carbon dioxide circulating working fluid

摘要

The present invention provides methods and system for power generation using a high efficiency combustor (220) in combination with a CO 2 circulating fluid (236). The methods and systems advantageously can make use of a low pressure ratio power turbine (320) and an economizer heat exchanger (420) and additional low grade heat from an external source (Q) can be used to provide part of an amount of heat needed for heating the recycle CO 2 circulating fluid. Fuel derived CO 2 can be captured and delivered at pipeline pressure while other impurities can be captured.