PSEG Fossil permits repowering of Sewaren peaking plant

The New Jersey Department of Environmental Protection will start taking public comment on July 12 on a draft approval for air permits to allow PSEG Fossil LLC to build 625-MW of new gas-fired capacity at its Sewaren Generating Station.

The public hearing will be held on Aug. 15 at the Woodbridge Township Municipal Building near the plant site. The written comment deadline is Sept. 3. PSEG Fossil is a unit of Public Service Enterprise Group (NYSE:PEG).

PSEG Fossil submitted applications in December 2011 and January 2012 for a federal Prevention of Significant Deterioration of Air Quality (PSD) permit, a Significant Modification to the Title V State Operating Permit, a modification to the Acid Rain permit, and a modification to the Clean Air Interstate Rule (CAIR) permit.

This permitting would allow PSEG to construct and operate a nominal 625-MW project at the Sewaren Generating Station in Sewaren, N.J. Construction of the project is estimated to be completed within 30 months after receiving permit approval, the DEP noted.

“The Project would replace five existing grandfathered High Energy Demand Day (HEDD) units at Sewaren Generating Station,” said a DEP fact sheet. “Four of the five HEDD units are Unit Nos. 1, 2, 3, and 4, (Title V Emission Units U1, U2, U3 and U4) which are natural gas and #6 oil fired boilers, and the fifth unit is Unit No. 6 (Title V Emission Unit U7) which consists of eight simple cycle FT4 turbines combusting oil. In addition to the above 5 units, PSEG would be retiring two House Heating boilers each less than 50 MMBtu/hr (Title V Emission Units U5 and U6) and a small emergency diesel fire pump (Title V Emission Unit U8). All of the eight units would be retired within three months of commencement of operation of any new turbine of the Project (Unit No. 7, Title V Emission Unit 13).”

The project would consist of Unit No. 7, comprising: two combined cycle combustion turbine generators (CTGs), two heat recovery steam generators (HRSG) equipped with duct burners, one steam turbine electric generator (STG); one 300 horsepower emergency diesel fire pump; and a three-cell mechanical cooling tower. The proposed Unit No. 7 would also be equipped with an air cooled condenser having 30 cells with each fan driven by an electric motor of about 250 horsepower.

PSEG has proposed to install either General Electric (GE) GE7FA turbines or Siemens Energy SGT6-5000F(5) combined cycle combustion turbine generators. The CTGs and duct burners would use only natural gas as fuel. Combined cycle electric output and fuel use would vary with ambient temperature, relative humidity and certain other operating conditions.

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.