Natural gas-fired, combined-cycle power plant
CPV Valley Energy Center is a proposed 630MW natural gas-fuelled, combined-cycle power plant (CCPP) to be located in the town of Wawayanda, 65 miles (105km) north-west of New York City. The power plant will cover an area of 21.25 acres on a 122-acre greenfield site.
The project is being developed by Competitive Power Ventures (CPV) in collaboration with Diamond Generating Corporation, a subsidiary of Mitsubishi Corporation. Siemens has agreed to supply the turbine and generator equipments and provide long-term services and financing for the plant.
The project was first proposed in 2008, all major approvals required for the construction were granted by June 2014, construction is scheduled to start in 2015 and the new plant is expected to be commissioned in late 2017.
Plains End is the world’s largest natural gas-fired peaking power plant.
The total investment for the development of the project is estimated to be $900m. Siemens Financial Services (SFS), in partnership with Siemens’ Power and Gas and Power Generation Services Divisions is providing an $80m term-loan for the construction. MUFG Union Bank, and Crédit Agricole Corporate and Investment Bank are the coordinating lead arrangers.
The power generated by the plant will be sufficient to meet the needs of approximately 600,000 homes. The project will further generate more than $30m in additional revenue for the region, 895 construction jobs and 23 full-time jobs, besides reducing CO² emissions significantly, compared to coal-fired power plants.
The main equipment will include two SGT6-5000F gas turbines, an SST-5000 steam turbine, and three SGen-1000A generators. The gas turbines will generate 365MW, whereas the steam turbine will generate 265MW.
The exhaust heat from the gas turbines will be conveyed to heat recovery steam generators (HSRGs) that integrate natural gas-fired duct burners to produce steam, which will further be used to drive the steam turbine generator for producing the additional power. The power plant will use ultra-low sulphur distillate oil as its back-up fuel.
The buildings at the site will be approximately 130ft-high and the combustion turbine stacks will be approximately 275ft-high. The required process water for the power plant will be supplied from the City of Middletown sewage treatment plant.
Storage facilities at the site will comprise a 965,000gal fuel oil storage tank, a 15,000gal aqueous ammonia storage tank and a 400,000gal demineralised water tank.
The output from the power plant will be conveyed to New York Power Authority’s (NYPA) 345kV Marcy South transmission line in Middletown. An underground transmission line and a 345kV gas insulated switchgear (GIS) will be constructed to facilitate the interconnection.
Approximately 130,000 dekatherms a day (Dth/day) of natural gas for the plant will be supplied via an eight-mile(13km) long lateral pipeline, connecting with Millennium Pipeline Company’s mainline.
The power plant will employ dry cooling technology to minimise the use of water and control cooling tower effluents.
It will use selective catalytic reduction (SCR) technology, an advanced, dry, low-nitrogen oxides (NOx) combustion system for the turbines and water injection to control NOx emissions, whereas an oxidation catalyst will be used to control carbon monoxide (CO) and volatile organic compound (VOC) emissions.
The construction contract for the power plant, worth approximately Skr2.1bn ($255m approximately), was awarded to the joint venture (JV) of Skanska, Burns & McDonnell and Ecco Enterprises, in July 2015.
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