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combined cycle · HRSG · power generation

Combined-cycle steam turbo alternator circuit

This steam circuit turbo alternator diagram explains the steam side of a combined-cycle power plant. Natural gas powers a gas turbine generator, whose hot exhaust feeds a triple-pressure heat recovery steam generator. The HRSG produces main steam at 100 bar and 565 C for an HP-IP-LP steam turbine connected to its own alternator and grid transformer.

Tipo Diagrama de flujoNorma Sugiyama layered DAG + orthogonal routingMotor schematex-flowchartActualizado 22/9/2026
Combined-cycle steam path
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La solicitud

“Create a steam circuit turbo alternator diagram for a combined-cycle power plant: natural gas to a gas turbine generator and grid transformer, gas-turbine exhaust to a triple-pressure HRSG, 100 bar 565 C main steam to an HP-IP-LP steam turbine and alternator, plus a condenser, hotwell, pumps, HRSG economizer, and feedwater return.”

Entonces pruebaAdd a steam bypass to the condenserAdd duct firing at the HRSG
Qué hay en este dibujo

Lee las decisiones que hay detrás.

01Heat recovery

Gas-turbine exhaust raises steam in a triple-pressure HRSG.

02Steam expansion

HP, IP, and LP stages extract work before condensation.

03Separate generators

Both turbine trains connect to the grid through their own transformers.

04Feedwater return

Recovered condensate re-enters the HRSG through the economizer.

Use this for a high-level combined-cycle plant overview where the heat-recovery steam cycle and both electrical trains need to be clear. It is suitable for training or plant documentation.

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Preguntas frecuentes

Preguntas habituales

What is an HRSG?

A heat recovery steam generator uses gas-turbine exhaust heat to generate steam.

Why are there two alternators?

The gas turbine and steam turbine each drive their own electrical generator.

What does triple-pressure mean?

The HRSG has multiple pressure levels to recover exhaust heat more efficiently.