US 12,221,903 B2
Hydrogen fueled electric power plant with thermal energy storage
William M. Conlon, Palo Alto, CA (US)
Assigned to PINTAIL POWER LLC, Palo Alto, CA (US)
Filed by PINTAIL POWER LLC, Palo Alto, CA (US)
Filed on Aug. 7, 2023, as Appl. No. 18/230,914.
Application 18/230,914 is a continuation in part of application No. PCT/US2022/015417, filed on Feb. 7, 2022.
Claims priority of provisional application 63/147,044, filed on Feb. 8, 2021.
Prior Publication US 2024/0159166 A1, May 16, 2024
Int. Cl. F01K 1/10 (2006.01); F01K 3/18 (2006.01); F01K 15/00 (2006.01)
CPC F01K 1/10 (2013.01) [F01K 3/186 (2013.01); F01K 15/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A combined cycle power plant comprising:
a combustion turbine generator that combusts a fuel comprising hydrogen gas to generate electricity and produce hot exhaust gases;
a second heat source, different from the combustion turbine;
a thermal energy storage system that stores heat from the second heat source;
a steam turbine generator that expands superheated steam across a steam turbine to generate electricity;
a feedwater reservoir that stores feedwater condensed from steam exhausted from the steam turbine;
a feedwater preheater configured to heat feedwater from the feedwater reservoir with heat exclusively from the combustion turbine exhaust gases;
a boiler configured to boil feedwater from the feedwater preheater with heat exclusively from the thermal energy storage system to produce steam;
a superheater configured to heat steam produced in the boiler exclusively with heat from the combustion turbine exhaust gases to produce the superheated steam; and
an electrically powered electrolyzer configured to electrolyze steam produced in the boiler to produce the hydrogen gas;
wherein the electrolyzer is fluidly coupled to the steam turbine and configured to electrolyze steam produced in the boiler, superheated in the superheater, and extracted partially expanded from the steam turbine generator to produce the hydrogen gas.