Exelon Generation (NYSE: EXC) is planning to build two combined-cycle gas turbine (CCGT) units in Texas utilizing a new General Electric (NYSE: GE) technology, making the projects among the cleanest, most efficient CCGTs in the nation.
The new units, which will be cooled with air instead of water, are being built on existing Exelon sites: one at the 498-MW Colorado Bend Generating Station, a natural gas plant in Wharton County; and the other at the 704-MW Wolf Hollow natural gas plant in Granbury. Each new unit will add nearly 1,000-MW of capacity.
Alstom Power (NYSE: AOMFF) will provide the Heat Recovery Steam Generators (HRSGs).
"These combined cycle plants will use our air-cooled 7HA.02 gas turbines, which provide the most output, highest efficiency and best operational flexibility for 60-Hz applications," said Victor Abate, president and CEO, Power Generation Products at GE Power and Water. "They are designed to start fast, ramp up more quickly and turndown more efficiently than any other H-class turbine on the market today. This translates into enabling Exelon to deliver power quickly when it is needed and to ramp down when it is not."
The turbines can withstand high temperatures, more than over 2600 degrees F, increasing efficiency and reducing ongoing maintenance costs.
Construction of the units is expected to begin in 2015 with commercial operation targeted for 2017.