The New York Department of Environmental Conservation will be taking comment until Feb. 26 on a draft air permit allowing Sithe/Independence Power Partners LP to install upgraded components in the Independence Station’s combustion turbines that will improve their efficiency and increase the station’s actual nominal ISO conditions output (net) by as much as 92 MW.
The upgrades include:
- Upgrade to General Electric‘s 2.6e combustion system. This involves replacement of combustion components in the engine and the turbine’s fuel supply train.
- Install Advanced Gas Path (AGP). This involves replacement of the compressor to increase the compression ratio and to adjust extraction/cooling flows. The upgrades will also involve replacement of the turbines’ hot gas path components such as buckets, nozzles, and shrouds.
- Upgrade controls support. GE will install Mark IV software controls to support these upgrades.
The plant is located in the town of Scriba in Oswego County. It is a cogeneration plant consisting of: four gas turbines/HRSG units with duct burners fueled by natural gas only; two auxiliary boilers fueled by natural gas or distillate oil; and an emergency diesel generator and a firepump engine firing distillate oil. The facility provides thermal energy to a host(s) facility. A dry low NOx combustor is used at each gas turbine in conjunction with the application of selective catalytic reduction (SCR) to control NOx.
The four turbines are the GE MS 7001 FA model with dry low NOx burners, heat recovery steam generators (HRSG) and duct burners. Each of the four gas units exhausts through its own separate stack. Each HRSG includes an SCR system.