US 12,270,320 B2
CO2 power cycle with adiabatic compression
Rodney John Allam, Chippenham (GB)
Assigned to 8 Rivers Capital, LLC, Durham, NC (US)
Appl. No. 18/710,723
Filed by 8 Rivers Capital, LLC, Durham, NC (US)
PCT Filed Nov. 17, 2022, PCT No. PCT/IB2022/061111
§ 371(c)(1), (2) Date May 16, 2024,
PCT Pub. No. WO2023/089540, PCT Pub. Date May 25, 2023.
Claims priority of provisional application 63/280,790, filed on Nov. 18, 2021.
Prior Publication US 2025/0052177 A1, Feb. 13, 2025
Int. Cl. F01K 25/10 (2006.01); F01K 11/02 (2006.01); F01K 25/14 (2006.01)
CPC F01K 25/103 (2013.01) [F01K 11/02 (2013.01); F01K 25/14 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A power production cycle comprising:
combusting a hydrocarbon fuel stream with an oxygen stream to produce combustion products;
combining the combustion products with a preheated circulating pressurized CO2 stream to form a mixture; and
feeding the mixture to a power turbine to create a discharge, the discharge then being fed into a recuperative heat exchanger to preheat the circulating pressurized CO2 stream,
wherein an adiabatic compression system is used to compress the circulating pressurized CO2 stream and oxygen from a turbine discharge pressure region to a turbine inlet pressure region,
wherein the circulating pressurized CO2 stream and oxygen leaving the adiabatic compression system enter the recuperative heat exchanger where they are heated against a cooling turbine exhaust flow,
wherein turbine exhaust leaving the recuperative heat exchanger enters a second heat exchanger that heats one or more fluid streams supplied from external sources; and
further comprising preheating the hydrocarbon fuel stream in the second heat exchanger and then heating the hydrocarbon fuel stream in the recuperative heat exchanger before combusting the hydrocarbon fuel stream.