System and method for preheating a heat recovery steam generator
AssigneeGeneral Electric Technology GmbH
InventorsRemo Richard Noonan, Wesley Paul Bauver, II
Life of this patent
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Abstract
A system for preheating a heat recovery steam generator is provided. The system includes a tank and a heat exchanger. The tank contains a transferring medium. The heat exchanger is disposed in a flow path of a flue gas produced by a combustion chamber, and is fluidly connected to the tank such that the transferring medium flows through the heat exchanger and is heated by the flue gas. The transferring medium preheats one or more components of the heat recovery steam generator.
Claims20
A system for preheating a heat recovery steam generator, the system comprising:
- a tank containing a transferring medium;
- a heat exchanger, disposed in a flow path of a flue gas produced by a combustion chamber, the heat exchanger being fluidly connected to the tank such that the transferring medium flows through the heat exchanger and is heated by the flue gas;
- and
- wherein, the transferring medium preheats one or more components of the heat recovery steam generator.
A method for preheating a heat recovery steam generator, the method comprising:
- containing a transferring medium in a tank disposed in the heat recovery steam generator;
- heating the transferring medium via a heat exchanger disposed in a flow path of a flue gas produced by a combustion chamber, the heat exchanger fluidly connected to the tank such that the transferring medium flows through the heat exchanger;
- and
- preheating one or more components of the heat recovery steam generator via the transferring medium.
A system for preheating a heat recovery steam generator of a combined cycle power generation plant, the system comprising:
- an evaporator drum, disposed in the heat recovery steam generator, containing drum water, the heat recovery steam generator configured to recover thermal energy from a flue gas produced by a primary generator of the combined cycle power generation plant when the combined cycle power generation plant is in a combined-cycle mode;
- a heat exchanger, disposed in a bypass stack of the combined cycle power generation plant, fluidly connected to the evaporator drum;
- and
- wherein when the combined cycle power generation plant is in a simple-cycle mode, the drum water flows through the heat exchanger, the bypass stack allows the flue gas to bypass the heat recovery steam generator and heat the drum water flowing through the heat exchanger, and one or more pressure parts of the heat recovery steam generator are preheated via the drum water before the one or more pressure parts are exposed to the flue gas when the combined cycle power generation plant is in the combined-cycle mode.
Dependencies are inferred from the claim text.