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US 12,584,424 B2Granted
Start-up and control of liquid salt energy storage combined cycle systems
AssigneePintail Power LLC
InventorWilliam M. Conlon
Life of this patent
Estimating the term…
Abstract
The invention relates generally to methods and apparatus for start-up and control of liquid salt energy storage combined cycle systems.
Claims20
A combined cycle electric power plant comprising:
- a combustion turbine generator that combusts fuel to generate electricity and produce hot exhaust gases;
- a second heat source, different from the combustion turbine generator;
- 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 generator;
- a feedwater preheater configured to heat feedwater from the feedwater reservoir with heat exclusively from the combustion turbine generator exhaust gases;
- a boiler configured to boil feedwater from the feedwater preheater with heat exclusively from the thermal energy storage system to generate steam;
- a superheater configured to heat steam from the boiler exclusively with heat from the combustion turbine generator exhaust gases to generate the superheated steam;
- a third heat source, different from the combustion turbine generator;
- and
- a startup feedwater heater arranged in parallel with the feedwater preheater between the feedwater reservoir and the boiler and configured to use heat from the third heat source to heat feedwater from the feedwater reservoir to a temperature greater than a freezing point of a heat transfer fluid used to transfer the heat from the thermal energy storage system to the boiler.
8 more elements
A combined cycle electric power plant comprising:
- a combustion turbine generator that combusts fuel to generate electricity and produce hot exhaust gases;
- a second heat source, different from the combustion turbine generator;
- 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 generator;
- a feedwater preheater configured to heat feedwater from the feedwater reservoir with heat exclusively from the combustion turbine generator exhaust gases;
- a boiler configured to boil feedwater from the feedwater preheater with heat exclusively from the thermal energy storage system to generate steam;
- a superheater configured to heat steam from the boiler exclusively with heat from the combustion turbine generator exhaust gases to generate the superheated steam;
- a third heat source, different from the combustion turbine;
- a startup feedwater heater configured to use heat from the third heat source to heat feedwater from the feedwater reservoir to a temperature greater than a freezing point of a heat transfer fluid used to transfer the heat from the thermal energy storage system to the boiler;
- and
- a startup superheater connected in parallel with the superheater between the boiler and the steam turbine generator and configured to heat steam from the boiler using heat exclusively from the thermal energy storage system.
9 more elements
Dependencies are inferred from the claim text.