CPV Maryland LLC applied Dec. 20 at the Maryland Public Service Commission for a change in the Certificate of Public Convenience and Necessity issued in 2008 for its nearly-operational combined-cycle project that would allow a 25-MW increase in the project’s 725 MW of nominal capacity.
The project is located in Charles County, in the Washington DC area, and is expected to commence commercial operations in January 2017. It is called the St. Charles Energy Center. The project is managed by Competitive Power Ventures.
The requested project changes would improve the plant’s heat rate, allowing the 25-MW bump in output. The changes include replacement of the existing General Electric dry low-NOx 2.6 combustors with GE dy low-NOx 2.6+ combustors, and an increase in the duct firing at the facility from 8,000 hours per year to 16,000 hours per year.
The project was first approved in 2008 at the 640-MW (nominal) sze level, with a 2012 change to the current 725 MW (nominal). As currently authorized, the project consists of two 213-MW GE 7FA.05 combustion turbines, two heat recovery steam generators with duct firing capabilities, and one 315-MW steam turbine.
The dry low-NOx 2.6+ combustors will provide increased electrical power output, CT efficiency, and operational flexibility. The company said the changes will increase the plant’s potential air emissions, but there are offsetting circumstances, including that Charles County has been redesignated from nonattainment to attainment for the 1997 particulate matter less than 2.5 microns (PM2.5) air quality standard.
The increase in the annual hours of operation of duct firing from 8,000 hr/yr for both CTs combined to 16,000 hr/yr for both CTs combined will result in an increase in potential annual air emissions.
A project contact is: Tom Favinger, Competitive Power Ventures, 8403 Colesville Road, Suite 915, Silver Spring, MD 20910, phone 240-723-2314, firstname.lastname@example.org.