PSM’s Sequential Fuel Injection (SFI) system is engineered for gas turbines that need deeper turndown capability for flexible dispatch. Designed as an enhancement for turbines equipped with LEC III, LEC NextGen, and DLN-1 combustion systems using inlet bleed heat (IBH), SFI extends turndown to 35% load while maintaining NOx and CO emissions within permit limits. That represents a 15% improvement over IBH-only operation. SFI is applicable to B/E-class gas turbines and is installed as an add-on to the existing combustion system during a standard outage.
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Dual Combustors. Smarter Performance.
SFI is built around a series arrangement of two combustors. A smaller second combustor is placed downstream of the primary liner and injects fuel directly into the aft end of the combustion zone. This design enables extended turndown while keeping NOx and CO emissions within permit limits—without sacrificing heat rate or efficiency.
The Ideal Partner for Hydrogen and Flexible Fuels
SFI works seamlessly with additional PSM technologies like ExB (Exhaust Bleed) and AutoTune, expanding the operability window and enabling reliable performance in hydrogen blends and alternate fuels. It helps plant operators meet future fuel flexibility demands today.
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Sequential Fuel Injection Flyer
