Systems And Methods To Extend Gas Turbine Hot Gas Path Parts With Supercharged Air Flow Bypass

摘要

A system and method for supercharging a combined cycle system includes a forced draft fan providing a variable air flow. At least a first portion of the air flow is directed to a compressor and a second portion of the airflow is diverted to a heat recovery steam generator. A control system controls the airflows provided to the compressor and the heat recovery steam generator. The system allows a combined cycle system to be operated at a desired operating state, balancing cycle efficiency and component life, by controlling the flow of air from the forced draft fan to the compressor and the heat recovery steam generator.

主权项

1. A method for extending hot gas path parts life in a turbine system, the method comprising:
determining a desired load; determining a nominal firing temperature for the desired load; determining a supercharged firing temperature for the desired load; determining a first mass flow quantity of air to be provided to a compressor in the turbine system to achieve the supercharged firing temperature for the desired load; providing an air flow; and conveying the first mass flow quantity of air into the compressor.