METHOD AND SYSTEM FOR POWER PRODUCTION WITH IMPROVED EFFICIENCY

A method for heating a recirculating gas stream comprising:passing a heated exhaust gas stream through a recuperative heat exchanger to withdraw heat therefrom and form a cooled gas stream;separating the cooled gas stream into at least a first fraction and a second fraction;compressing the first fraction of the cooled gas stream to form a compressed first fraction gas stream;compressing the second fraction of the gas stream so as to add heat to the second fraction of the gas stream and form a compressed second fraction gas stream;combining the compressed first fraction gas stream and the compressed second fraction gas stream to form a combined recirculating gas stream; andpumping the combined recirculating gas stream to a pressure that is greater than a pressure of the compressed first fraction gas stream and greater than a pressure of the compressed second fraction gas stream;wherein the combined recirculating gas stream is heated using the heat withdrawn from the heated exhaust gas stream and the heat added to the second fraction of the gas stream.