US 12,338,765 B2
Power generation and storage
Chloe J Palmer, Derby (GB); and Peter Swann, Derby (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Appl. No. 18/715,858
Filed by ROLLS-ROYCE plc, London (GB)
PCT Filed Nov. 16, 2022, PCT No. PCT/EP2022/082055
§ 371(c)(1), (2) Date Jun. 3, 2024,
PCT Pub. No. WO2023/104451, PCT Pub. Date Jun. 15, 2023.
Claims priority of application No. 2117755 (GB), filed on Dec. 9, 2021.
Prior Publication US 2025/0043715 A1, Feb. 6, 2025
Int. Cl. F02B 63/04 (2006.01); F01N 3/02 (2006.01); F01N 3/08 (2006.01); F02B 29/04 (2006.01)
CPC F02B 63/042 (2013.01) [F01N 3/0205 (2013.01); F01N 3/08 (2013.01); F02B 29/045 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A combined cycle power generation and storage system comprising:
a liquid air energy storage system configured to use power to liquefy air and store it in a liquid state;
a combustion engine configured to produce power by combustion of a carbon-based fuel along with an exhaust stream containing carbon dioxide;
a heat recovery system configured to exchange heat from the exhaust stream to air from the liquid air storage system, and thereby produce a cooled exhaust stream and heated air;
an air expansion machine configured to recover power by expansion of heated air from the heat recovery system; and
a separation system configured to separate carbon dioxide from ambient air prior to liquefaction during operation of the liquid air energy storage system, and to separate carbon dioxide from the cooled exhaust stream during operation of the combustion engine prior to emission of the cooled exhaust stream to atmosphere, wherein the separation system comprises:
a reverse Brayton cycle cooler configured to further cool the cooled exhaust stream or ambient air to liquefy carbon dioxide therein, and to thereby produce a further-cooled gas stream; and
a separation unit configured to separate carbon dioxide entrained in the further-cooled gas stream, and thereby produce an output gas stream having a reduced concentration of carbon dioxide.