New Jersey agency seeks comment on permits for 633-MW Middlesex project

The New Jersey Department of Environmental Protection is taking comment until July 14 on draft Prevention of Significant Deterioration and Pre-Construction permits allowing Middlesex Energy Center LLC to construct and operate a 633 MW (gross) project which consists of a 1-on-1 (one combustion turbine and one steam turbine) combined-cycle facility.

The electric output of the combined-cycle combustion turbine (CCCT) at ISO conditions will be approximately 380 MW and the approximate output of the steam turbine at these conditions and with 100% supplemental heat input will be 253 MW. The project will consist of one General Electric (GE) 7HA.02 CCCT nominally rated at 380 MW at ISO conditions without duct firing with a maximum heat input rate of:

  • 3,462 MMBtu/hr(HHV) at (0) degrees F, 100% load combusting natural gas, and
  • 3,613 MMBtu/hr(HHV) at (0) degrees F, 100% load combusting ULSD.

The CCCT will be equipped with a heat recovery steam generator (HRSG) with a natural gas-fired duct burner (maximum heat input of 599 MMBtu/hr (HHV)) for supplemental firing. The primary fuel for the CCCT will be natural gas. Ultra-low sulfur diesel (ULSD) will be used as a backup fuel for up to the equivalent of 30 days per year.

Combustion pollutant controls utilized by the CCCT include a dry low NOx combustion system (used during natural gas combustion only) and a water injection system (used during ULSD combustion only), to control emissions of nitrogen oxides (NOx). Post-combustion pollutant controls for the turbine include a Selective Catalytic Reduction (SCR) system for further reduction of NOx and an oxidation catalyst for control of carbon monoxide (CO) and volatile organic compounds (VOC).

The project also includes:

  • One 97.5 MMBtu/hr(HHV) natural gas fired auxiliary boiler, equipped with low NOx burners and flue gas recirculation for control of NOx emissions;
  • One 2.25 MMBtu/hr(HHV), 327 brake horsepower, ULSD fired emergency fire pump;
  • One 14.4 MMBtu/hr(HHV), approximately 1,500 kW ULSD fired emergency generator; and
  • One 8-cell, 124,800 gallon per minute (gpm) mechanical induced draft cooling tower.

The Middlesex Energy Center would be located at 562 Jernee Mill Rd. in Sayreville Township, Middlesex County, New Jersey.

The DEP lists a project contact as: David Himelman, Manager, Middlesex Energy Center, c/o Stonegate Power LLC, 190 Rt 18 – Ste 205, East Brunswick, NJ 08816.

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.