NRG nears permit for new Unit 5 at its Cedar Bayou plant in Texas

The Texas Commission on Environmental Quality said in a March 6 notice that it plans to approve a greenhouse gas permit that will allow NRG Texas Power LLC to construct Unit 5 at the Cedar Bayou Station located at Baytown in Chambers County, Texas.

This application, filed this past November, was processed in an expedited manner.

This permit authorizes two natural gas fired combustion turbines (CTGs) to operate in either simple or combined cycle mode under any of these options:

  • Two General Electric Model 7FA (GE7FA) CTGs each rated at nominal capability of 215 MW. Each CTG will be equipped with a heat recovery steam generator with associated duct burners each rated at 523 million British thermal units per hour.
  • Two General Electric Model 7HA (GE7HA) CTGs each rated at nominal capability of 359 MW. Each CTG will be equipped with a heat recovery steam generator with associated duct burners each rated at 301 million British thermal units per hour.
  • Two Siemens Model F5 (SF5) CTGs each rated at nominal capability of 225 MW. Each CTG will be equipped with a heat recovery steam generator and associated duct burners each rated at 688 million British thermal units per hour.
  • Two Mitsubishi Heavy Industries G Frame (MHI501G) CTGs each rated at a nominal electric output of 263 MW. Each CTG will be equipped with a heat recovery steam generator and associated duct burners each rated at 686 million British thermal units per hour.

The CTGs, duct burners, and auxiliary boiler shall be limited to the use of pipeline quality natural gas containing no more than 0.5 grains total sulfur per 100 dry standard cubic feet (gr/100 dscf).

TCEQ noted: “NRG Texas Power, LLC (NRG Texas) owns and operates the Cedar Bayou Electric Generating Station (Cedar Bayou Station). NRG Texas is proposing to construct an additional electric power generation block (Cedar Bayou 5) at the Cedar Bayou Station which will generate electric power for sale on the wholesale electric market. The Cedar Bayou 5 Power Project will include a new power block that can be operated in simple cycle or combined cycle modes. Ancillary equipment includes an auxiliary boiler and fugitives.”

NRG Energy (NYSE: NRG) said in a July 2014 filing at the Texas Public Utility Commission that it has been permitting about 1,400 MW of new capacity in the area around Houston: the Cedar Bayou Unit 5, 2×1 combined cycle gas turbine facility (about 700 MW net); and S.R. Bertron Unit 5, 2×1 combined cycle gas turbine facility (about 700 MW net).

Notable is that the TCEQ last fall took over greenhouse permitting in Texas from EPA Region 6, which had handled this type of permitting while the Texas commission formulated its own permitting program.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.