System for reheat steam temperature turndown control in heat recovery steam generators
AssigneeGE Vernova Infrastructure Technology LLC
InventorRaub Warfield SMITH
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Abstract
A steam supply system for a power generation system is disclosed. The steam supply system includes a heat recovery steam generator and a fired reheater. The heat recovery steam generator includes a high-temperature section including a high-pressure superheater and a reheater arranged in series with respect to exhaust gas flowing through the heat recovery steam generator; and, an evaporator downstream from the high-temperature section. The evaporator extracts heat from exhaust gases exiting the high-temperature section. The fired reheater contributes at least a portion of energy necessary to increase a temperature of cold reheat steam to a target temperature.
Claims24
A steam supply system for a power generation system, the steam supply system comprising:
- a heat recovery steam generator comprising:
- a high-temperature section including a high-pressure superheater and a first reheater arranged in series with respect to exhaust gas flowing through the heat recovery steam generator;
- and,
- an evaporator downstream from the high-temperature section, wherein the evaporator extracts heat from exhaust gases exiting the high-temperature section;
- and,
- a second reheater to contribute at least a portion of energy necessary to increase a temperature of cold reheat steam to a target temperature.
A combined cycle power generation system comprising:
- a gas turbine to generate power;
- a heat recovery steam generator having a gas inlet in communication with a gas turbine exhaust stream, the heat recovery steam generator comprising:
- a high-temperature section including a high-pressure superheater and a first reheater arranged in series with respect to exhaust gas flowing through the heat recovery steam generator;
- and,
- an evaporator downstream from the high-temperature section, wherein the evaporator extracts heat from exhaust gases exiting the high-temperature section;
- a second reheater to contribute at least a portion of the energy necessary to increase a temperature of cold reheat steam to a target temperature;
- and,
- at least one of an intermediate pressure steam turbine and a non-condensing steam turbine configured to receive reheated steam from at least one of the second reheater and the first reheater of the heat recovery steam generator.
Dependencies are inferred from the claim text.