Cooperative Energy in Mississippi was close to going over its allowed CO2 output. The source? One 107EA combined cycle gas turbine. While underfiring just to be in compliance, Cooperative Energy sought lower-NOx solutions and added megawattage for summer demands.
GE’s advanced secondary fuel nozzle (ASFN ) was installed in less than 48 hours—and with its new configuration that premixes air and fuel in DLN1/1+ systems, Cooperative energy saw lower emissions, more MWs, and renewed reliability.
degrees while maintaining a NOx of just 9 ppm
hours of install time for ASFN
additional MWs of turndown capability
Lower NOx, allowing an overfire of 65°
GE certainly gave us a jump in availability before summer starts taxing us. Our 107EA turbines aren’t just better, they’re helping us meet emissions best practices, which is the sustainability example Cooperative Energy wants to set as one of the major generation and transmission cooperatives in Mississippi.
Jacob Staples
Site CPM Service Manager
We’re happy to be GE’s launch customer. The new 7E fuel nozzle is the icing on the cake of this project. Plant managers appreciate the small things, like the advanced secondary fuel nozzle (AFSN), to make a big difference down the line. Our ability to overfire when needed tacks on 5% output for the hundreds of thousands of homes and facilities we serve, and that adds up for everyone.
Christian East
On-site Point Manager
Cooperative Energy is a generation and transmission cooperative, powering approximately 437,000 homes and businesses across Mississippi. One of its turbines gave off CO2 at the ceiling of what was permitted. The unit was underfired and derated for compliance, but permanent measures were needed—not only to lower NOx, but to boost availability in the face of upcoming summer heat.
GE upgraded the 107EA combined cycle gas turbine, raising its DLN to 2.6+. But for long-lasting emission curbing, GE installed its newly configured advanced secondary fuel nozzle (AFSN), dropping Cooperative Energy’s NOx by a marked 37%. Now, the upgraded unit can overfire at +55° with NOx emissions at only 9 ppm.
Bothersome to start and stop overnight, a second 107EA turbine was addressed, and tuned for maximum turndown, it showed 45% load while meeting emissions compliance. Seeing the additional 15 MW of turndown and knowing this would support future renewables, Cooperative Energy asked that the first unit be tuned the same way.
With every upgrade done in four months, and far more cost-effective than an advanced gas path solution, GE’s 3D-printed fuel nozzle also helped add 4 MW to Cooperative Energy’s power profile. With that, it became GE’s ASFN launch customer, having since signed on for a multi-year maintenance program and a continued partnership.
GE’s advanced secondary fuel nozzle (ASFN) was installed in less than 48
hours—and with its new configuration that premixes air and fuel in DLN1/1+
systems, Cooperative energy saw lower emissions, more MWs, and renewed
reliability.
