Repowering the Greenidge Station with APFBC
Conference
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OSTI ID:20013450
Advanced circulating pressurized fluidized bed combustion combined cycle (APFBC) is a coal-fired technology now under test in large scale demonstrations, that will be ready for commercial repowering installations around year 2005. It is prudent to begin evaluating APFBC configurations that might be developed based on a variety of gas turbine equipment. This paper describes a conceptual design evaluation effort that is underway to assesses the merits of APFBC repowering one of the units at the New York State Electric and Gas Company's (NYSEG) Greenidge station. Unit 4 at the station is a 108,000 KWe reheat unit that is located near Dresden, New York, and sits on Seneca Lake. Earlier APFBC repowering concept evaluations show that APFBC has some important advantages for the power generating company owner. For example, using APFBC to repower the 206 MWe output Carolina Power and Light Company's L.V. Sutton steam station Unit 2, or the Duke Energy Dan River Station Unit 3 showed that APFBC repowering would boost output, improve energy efficiency, and improve environmental performance. In those two studies a single APFBC-modified Siemens Westinghouse W501F combustion turbine was used. Similar improvements are anticipated for NYSEG's Unit 4, as the first of several APFBC concept options for the station are explored. This study differs from the others. Here, instead of a large frame gas turbine, a modified aeroderivative gas turbine, the Rolls Royce Industrial Trent is evaluated. This machine has a significantly higher overall pressure ratio compared to the frame type machines evaluated in the previous studies. The concept evaluation here considers a 2 x Trent configuration for the repowering of Greenidge Unit 4. Even with significant steam turbine back-end flow limitations, with APFBC repowering the first configuration evaluated boosts output from 106,310 kW to 206,300 kW, and the unit with this integration scheme is expected to operate at 39.8% HHV energy efficiency. Different APFBC integration options are expected to overcome the steam turbine limitations, and produce even higher energy efficiency.
- Research Organization:
- Parsons Infrastructure and Technology Group, Inc., Reading, PA (US)
- Sponsoring Organization:
- US Department of Energy
- DOE Contract Number:
- AC01-94FE62747
- OSTI ID:
- 20013450
- Country of Publication:
- United States
- Language:
- English
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