The Pennsylvania Department of Environmental Protection is close to issuing an air permit to Moxie Patriot LLC of Vienna, Va., for a natural gas-fired combined-cycle power plant to produce 944 MW or less of electricity in Clinton Township, Lycoming County, Pa.
The project consists of two identical 1×1 power blocks, and each block includes a combustion gas turbine and a steam turbine, said a DEP notice of intent to issue the air permit published in the Sept. 29 Pennsylvania Bulletin. Each combined-cycle process involves the combustion turbine and a heat recovery steam generator with duct burner firing capabilities.
Each combined-cycle process will be rated at 472 MW or less. The heat input rating of each combustion gas turbine is 2,890 MMBtu/hr (HHV) or less, and the heat input rating of each supplemental duct burner is equal to 387 MMBtu/hr (HHV) or less.
Moxie Patriot will only be able to build and operate this facility under one of two permitted options.
- The first option consists of constructing two Mitsubishi M501GAC lean premix DLN natural-gas-fired combustion turbines (CT) and steam turbines (ST), where each CT and ST train are configured in a single shaft alignment and drive one common electric generator. Each unit will be equipped with natural-gas-fired duct burners (DB) and heat recovery steam generators (HRSG). Each Mitsubishi train will be capable of producing about 472 MW and is incorporated into this plan approval as Source IDs P101 and P102. The maximum heat input rating of each CT associated with Source IDs P101 and P102 shall be no greater than 2,905 MMBtu/hr (high heating value, HHV). Each DB associated with Source IDs P101 and P102 shall not have a maximum heat input rating above 387 MMBtu/hr (HHV).
- The second option consists of two Siemens SGT6-8000H lean premix DLN natural-gas-fired CTs with STs, where each CT and ST train are configured in a single shaft alignment and drive one common electric generator. Each unit will be equipped with natural-gas-fired DBs and HRSGs. Each Siemens train will be capable of producing about 458 MW of electricity and incorporated into this plan approval as Source IDs P103 and P104. The maximum heat input rating of each CT associated with Source IDs P103 and P104 shall be no greater than 3,007 MMBtu/hr (HHV). Each DB associated with Source ID P103 and P104 shall not have a maximum heat input rating above 164 MMBtu/hr (HHV).
This is second of two Moxie Energy gas plants in Pennsylvania
Also, Moxie Liberty LLC of Vienna, Va., has been working on DEP approval for air permitting for a 936-MW gas-fired combined-cycle power plant, with the plant to be located in Asylum Township, Bradford County, Pa.
The DEP said in a notice in the July 28 Pennsylvania Bulletin that the project consists of two identical 1×1 power blocks, with each block including a combustion gas turbine and a steam turbine. Each combined-cycle process will also include a heat recovery steam generator and supplemental duct burners. Bradford County is in the northeast part of the state, just south of the New York state line.
The website of Moxie Energy LLC said the company plans to build the power plant in Asylum Township, Pa., to take advantage of the abundant natural gas resources in the area and the skilled workforce that has developed around the domestic gas production.
‘Once completed in mid 2015, the $800-plus million investment will provide a significant and steady tax base to the area, 25 to 35 high paying technical and operations jobs, and an ongoing source of community programs,” according to the website.
The website said that Moxie Energy, under Moxie Patriot, is also planning a similar gas-fired power project in Lycoming County, Pa.