Systems and methods for power production using nested CO2 cycles

Patent metadata

Field	Value
Publication number	US-10422252-B2
Application number	US-201615252798-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Sep 1, 2015
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

The present disclosure relates to systems and methods useful for power production. In particular, a power production cycle utilizing CO2 as a working fluid may be combined with a second cycle wherein a compressed CO2 stream from the power production cycle can be heated and expanded to produce additional power and to provide additional heating to the power production cycle.

First claim

The invention claimed is:

1. A power production method comprising:
operating a first power production cycle wherein a recycled CO 2 stream is subjected to repeated compression, heating, combustion, expansion for power production, and cooling; and
operating a second power production cycle wherein compressed recycled CO 2 from the first power production cycle is heated with a heat source that is independent of the first power production cycle, expanded for power production, and recombined with the recycled CO 2 stream in the first power production cycle.

2. The power production method of claim 1 , wherein the heating in the first power production cycle includes receiving heat provided to the recycled CO 2 in the second power production cycle.

3. The power production method of claim 1 , wherein the heat source in the second power production cycle is one or more of a combustion heat source, a solar heat source, a nuclear heat source, a geothermal heat source, and an industrial waste heat source.

Assignees

• 8 Rivers Capital Llc

Inventors

• Allam Rodney John
• Forrest Brock Alan

Classifications

• F02C1/08

  Semi-closed cycles · CPC title

• F02C3/34

  with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle · CPC title

• F01K25/103 Primary

  Carbon dioxide (F01K25/065 takes precedence) · CPC title

• F25J3/04018

  of main feed air · CPC title

• F01K7/16

  the engines being only of turbine type (the engines using steam of critical or overcritical pressure F01K7/32; the engines being of extraction or non-condensing type F01K7/34) · CPC title