General Electric (NYSE: GE) is deploying gas turbines at power plants in the U.S. and Saudi Arabia, and is also introducing new equipment that can be used to retrofit existing plants, driving up capacity and efficiency at those existing facilities.
GE unveiled the technologies in a Dec. 9 session with the media at PennWell’s annual Power Generation Week conference in Orlando.
In the U.S., GE will supply two of its highly efficient and flexible 7F.05 gas turbines to Calpine Corp. for the York 2 Energy Center, a nominal 760-MW, dual-fuel combined cycle plant near York, Pa. That project is adjacent to Calpine’s existing York Energy Center. The turbines are to be delivered to the site in December 2015.
These turbines will use GE’s Dry Lower NOx 2.6+ dual-fuel combustion system, which reduces NOx emissions to as low past 9 parts per million during gas-fired operations without using water injection technology. The turbines will also be able to operate on low-sulfur diesel fuel.
In Saudi Arabia, the first four of GE’s 7F.05 gas turbines at Saudi Electric Co.’s Power Plant 12 have reached commercial operation, with another four to follow. All eight units at PP12 should be operating commercially in combined-cycle mode by early 2015, delivering nearly 2,000 MW.
PP12 is part of Saudi Arabia’s plan to add 33 GW of power capacity by 2020. The eight units at PP12 are the first of 20 GE 7F.05 turbines to be delivered, with another 12 turbines for PP13 and PP14 to be delivered in late 2014 and early 2015.
Two new breakthrough technologies that GE announced for its 7F turbines - which can be built as part of new installations and retrofit on older ones – are the Dry Low NOx (DLN) 2.6+ Combustion and Advanced Compressor upgrades. These are the latest additions to GE’s Power FlexEfficiency portfolio of upgrade solutions.
Said Paul McElhinney, GE’s president and CEO of Power Generation Services: “These solutions will provide our customers with the operational flexibility to quickly respond as their needs evolve over time.”
The DLN 2.6+ solution adds fuel flexibility, allowing burns of up to 25 percent ethane or propane from shale gas, along with regular natural gas. The system can also handle up to 20 percent hydrogen. The first order for this upgrade system has been placed with an unnamed Midwest power plant. The technology also allows reductions of NOx emissions to as low as 5 ppm. It can be combined with GE’s OpFlex software to further reduce emissions.
The Advanced Compressor can increase efficiency (by up to 2 percent), output (by up to 12 percent) and operational availability. This system is new to the retrofit market, but already being used on new 7F.05 gas turbines.