The Florida Department of Environmental Protection on Sept. 10 issued a final air construction permit that will allow Florida Power & Light to partially repower its Fort Myers plant in Lee County.
At Fort Myers, gas turbine (GT) Units 1 through 12 began operation in May 1974. Each of the 12 GTs has a nominal gross capacity of 63 MW. In addition to units GT1 through GT12, the Fort Myers plant consists of six combined-cycle generating units (Units 2A through 2F) which began operation between 2000 and 2001, and two modern simple cycle combustion turbines (Units 3A and 3B) which began operation in 2003.
Each combined-cycle unit (2A through 2F) consists of one combustion turbine (CT) which exhausts through a separate heat recovery steam generator (HRSG). Each HRSG converts the heat from the CT exhaust into steam. The steam produced from the HRSG drives a steam turbine electrical generator. Each combined-cycle unit has a net summer continuous capability of 250 MW, which includes 170 MW from the CT generator and 80 MW from the associated steam turbine generator.
The two existing simple cycle CTs (3A and 3B) are 170-MW General Electric MS7241FA peaking units, with dry low-NOX combustors.
Under the final permit issued Sept. 10, the generation capacity of 10 of the 12 existing peaking GTs will be replaced with two nominal 200-MW CTs to provide equivalent peaking resources to reduce emissions while providing far superior emission profiles and efficiency. The new CTs will be designated Units 3C and 3D. Two of the 12 existing GTs will be retained for the purposes of black start capability and generation. This project also adds circuit breakers associated with these changes in generation.
The CT model proposed for this new project is the General Electric 7F.05. Each of these CTs will utilize inlet air cooling and wet compression.
FPL has an active slate of partial repowerings and brand new plants
This is one of four gas-fired projects that Florida Power & Light outlined in a Ten Year Power Plant Site Plan filed April 1 at the Florida Public Service Commission. Those new gas-fired additions are:
- The Fort Myers plant additions would be two CTs, of 211 MW (summer net, plus 20 MW peaking capacity) apiece, to be commercial in 2016. The existing plant consists of one natural gas-fired combined cycle (CC) unit, two natural gas- and oil-fired CT units, and one bank of 12 oil-fired GTs (peaking facilities) that have a combined capacity of 2,403 summer MW. Presently, the bank of 12 first generation GTs provide power during periods of peak demand and black start capability in the event of a power outage. FPL plans to add the two new CTs and retire ten of the existing GTs by the end of 2016. The two new CTs will be more efficient with cleaner air emissions than the existing GTs. In addition, the two existing CTs will be upgraded to produce additional generation capacity.
- At the Lauderdale plant, the plan is for five new CTs of the same capacity as those at Fort Myers, also to be commercially operating in 2016. The Lauderdale Plant currently includes two combined cycle units and two banks of 12 first generation simple cycle GTs that began operation in the early 1970s. These GTs are used to serve peak and emergency demands in a quick-start manner. Each bank of GTs has a net capacity of 420 MW and they are authorized to operate on natural gas and distillate oil. This removal of 22 of the GTs (the other two would be retained for black start usage) with CT replacement is assumed to occur by the end of 2016. The Florida DEP issued a final air construction permit for this project on Aug. 25.
- Due for commercial operation in 2019 would be the brand-new Okeechobee Clean Energy Center, which is a gas-fired, combined-cycle project of 1,622 MW (net summer) in size. FPL owns 2,800 acres of land in Northeast Okeechobee County. A CC unit at this site has been determined to be FPL’s best self-build option for meeting its capacity needs beginning in 2019. In March 2015, FPL issued a request for proposals (RFP) to solicit proposals from outside parties for meeting this capacity need. Natural gas-fired CC generation at the site is possible due to the proximity to existing and planned natural gas pipelines. FPL applied Sept. 3 at the Florida Public Service Commission for an affirmative determination of need covering this project.
- There is also a gas-fired project called the “Unsited 3×1 CC,” which would go commercial in 2023 and be 1,317 MW (summer net) in size.