The latest in GE heavy duty gas turbine combustion technology is now available on Frame 7E/EA and 9E machines. Late Fuel Staging (LFS) delivers innovative flexibility, providing value to customers in turndown, efficiency, emissions, and operability. Until now, these machines were characterized by a compliant load range from ∼60% to 100%. Late Fuel Staging delivers additional turndown to ∼35% through physics-based understanding, advanced modeling, and state-of-the-art testing.
In the 1990s, GE’s Dry Low NOx (DLN) technology helped E-class industrial gas turbines with the DLN1 combustor achieve single-digit NOx emissions. Today more than 730 DLN1 systems are installed worldwide. Recent advances in the technology achieve ultra-low single-digit NOx emissions well below 5 ppm. This paper summarizes the development history of DLN1, the operating experience of DLN1 and the recent technical advancements made to enable DLN1+ to achieve low single digit NOx emissions on 7E and 6B engines. Field validation performance results of the systems in commercial operation will be shared as well as a summary of fuel-flexibility results for the DLN1 and DLN1+ systems.
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