The typical design life of HRSG pressure parts is 25 to 30 years. Operating the HRSG outside of the original specification—and especially cycling gas turbine operation—can result in accelerated lifetime consumption, which typically leads to an increased risk of forced outage and increased Operation & Maintenance costs.
Attemperators (Desuperheaters) are often a pain point for HRSG users.
If your older HRSG is equipped with the “standard” HRSG superheater drain system and you are now considering a shift towards a more cycling operating regime, you may not be completely removing condensate from tubes and lower headers / manifolds during start-up and shut down.
GE’s engineers can suggest an upgrade of your original HRSG front end drain system to increase its capacity. Features of such an upgrade would be:
If you’ve upgraded your HRSG, your tube restraint system may be exposed to gas temperatures higher than anticipated at the time your HRSG unit was designed. These higher temperatures can lead to failure of tube restraint components.
To improve reliability of your tube restraint system, GE has developed a range of tube restraint upgrade options that involve a combination of stabilizing and replacing the existing restraint system.
Our HRSG tube restraint system upgrades can be installed during a scheduled major GT outage.
GE’s HRSG upgraded liner / insulation system involves repairing and/or replacing existing materials to improve reliability. The available improvements are based on the latest specifications for new HRSGs, which continue to evolve as we gain more experience with challenging exhaust gas profiles.
Our liner system upgrade can be installed during a scheduled major GT Inspection.
Our Quick Entry Access Doors for HRSGs provide a larger opening that allows personnel to access the boiler more quickly, easily and safely.
Features of the upgraded GE HRSG doors:
GE’s HRSG remote monitoring & diagnostics service uses real-time data to detect anomalies during operation. This service can be offered on any HRSG behind a GE gas turbine.
How it works
HRSGs endure significant cyclic and long-term high temperature operation, resulting in accelerated fatigue and creep damage to critical pressure part components. GE’s HRSG Life Monitor (LM) is an online hardware/software solution that helps quantify lifetime consumption so you can make informed decisions about your critical components’ overall life expectancy and plan major outages and upgrades.
Fast, efficient, reliable starts can be an essential factor to a combined-cycle plant’s profitability. Traditional HRSG attemperation control methods are slow to respond to transient conditions, creating potential financial concerns associated with missed dispatch commitments and/or extended operation in unprofitable conditions.
GE’s OpFlex Advanced Attemperator solution uses Model-Based Control (MBC) technology to improve the overall combined cycle start-up and transient loading process. MBC provides better control of the high pressure and reheat interstage attemperators, resulting in reduced upset events, shortened start times, and improved overall dispatch response.