Patent ID: 9611785
Date: 2017-04-04
CPC Classifications: F01D,F01K,F01N,F02C,F05D,H02K,Y02E

Claim:
1. A method for producing power, comprising: combusting a first fuel stream and a first air stream in a first combustor in the presence of a first recycle stream to produce a first combustion stream; expanding the first combustion stream in a first turbine to rotate the first turbine and produce power; directing at least a portion of a first discharge stream from the first turbine to a first heat exchanger; employing the portion of the first discharge stream to heat the first air stream and at least a portion of the first recycle stream that is produced from the first discharge stream with the first heat exchanger; combusting a second fuel stream and a second air stream in a second combustor in the presence of a second recycle stream that is produced from the first discharge stream to produce a second combustion stream; expanding the second combustion stream in a second turbine to rotate the second turbine to produce power; directing the second air stream and the second recycle stream to a second heat exchanger; heating the second air stream and the second recycle stream with the second heat exchanger; and wherein the first turbine is positioned upstream of the first heat exchanger and the first heat exchanger is positioned upstream of the second turbine in terms of a flow of the first discharge stream.