HRSG Basic details, How HRSG works, Gas turbine power plant

A HRSG starts at the exhaust of the gas turbine and ends at the exit of a stack that releases exhaust gas to the atmosphere.
Components:
Ductwork and Casing (Enclosure): Contains the economizers, evaporators, steam drums, superheaters, and reheaters.
Economizers: Heat water to near saturation.
Evaporators and Steam Drums: Convert water from the economizers into steam and separate the steam from water.
Superheaters and Reheaters: Heat steam beyond saturation.
Stack: Exhausts the gases to the atmosphere.
Functionality:
The HRSG section comprises gas-gas heat exchangers, heaters, evaporators, and superheaters that recover the perceptible heat of the hot gas from the gas turbine and generate water vapor.
It preheats boiler feedwater, reheats medium steam water, generates high-pressure steam, and superheats high-pressure steam.
The HRSG can produce steam at higher pressure and superheat it to further increase its energy content.
The HRSG is a crucial component that enhances thermal efficiency and reduces CO2 emissions by recovering heat from the exhaust gases of a gas turbine, converting it into steam to power a steam turbine.
Here are the key points about the HRSG based on the description:
High Thermal Efficiency: The HRSG contributes to the high thermal efficiency of combined cycle power plants.
Minimal CO2 Emissions: It helps in reducing CO2 emissions.
Heat Exchanger: The HRSG acts as a heat exchanger, recovering heat from exhaust gases.
Finned Tubes: These tubes are used in the HRSG for their excellent heat-transfer performance.
Compact Design: The design minimizes the installation footprint.
Selective Catalyst Reduction (SCR): SCR equipment within the HRSG reduces nitrogen oxides in the exhaust gases.

[@hasan5658]

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[@Ankit_Tarpara]

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[@rameshwarlalgupta6503]

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[@osabu9949]

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[@osabu9949]

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[@rameshwarlalgupta6503]

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