Combustion
H.F. Lee Unit 2 CHIPPS Repowering
FBC Repower APFBC AES Greenidge APFBC Dan River FBC, APFBC Four Corners CHIPPS H.F. Lee
Products Summary Sheldon Summary APFBC Sheldon GFBCC Sheldon APFBC L.V. Sutton
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Contents:
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Summary
This would be the sixth plant evaluated for its potential for repowering with a Combustion Technologies product. The Carolina Power & Light Company's H.F. Lee Unit 2 would be repowered using a hybrid combustion-based high performance power systems (CHIPPS).
This concept assessment evaluated a new way to get more electricity from an existing electric plant. The method would evaluate how the Carolina Power & Light Company (CP&L) might add new equipment to H.F. Lee Unit 2. The efficient new equipment continues the use of coal there, but lowers electricity costs. The method significantly reduces the amount of wasted energy, so more electricity is produced from each ton of coal, with much less pollution. DOE emphasizes that this is only a feasibility study, and no actual construction is planned at the Goldsboro, North Carolina site.
The new way of getting more electricity from an existing generating station is a hybrid variation of combustion-based high performance power system technology (CHIPPS). This is a completely coal-fired plant upgrade, to make the repowered unit operate with very attractively low production costs. This concept uses a pressurized circulating fluidized-bed (PCFB) partial gasifier to produce moderate temperature syngas. The syngas is filtered through sintered metal filters to protect the gas turbine from dust. That syngas is burned in the gas turbine, adding electric output from the site.
The PCFB partial gasifier uses only part of the coal's energy. The remaining char is dropped in pressure and cooled, then blown to the existing furnace to produce steam for the existing steam turbine.
Additional heat is recovered from the gas turbine exhaust and from the PCFB partial gasifier. This raises steam for a new auxiliary condensing steam turbine/generator, adding output and increasing the energy efficiency of the unit.
CHIPPS is under development by industry and the DOE. A CHIPPS repowering project like this uses developed components, so it should be ready for commercial orders soon. A number of electric companies are looking at the technology to see whether CHIPPS repowering makes sense for them. The CHIPPS equipment would come from Foster Wheeler, the sintered metal filters from Siemens Westinghouse Power Corporation, and the gas turbine from General Electric. Parsons Corporation is providing the study’s engineering for the DOE.
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Existing Unit 2
This Progress Energy coal-fired power plant has the following characteristics:
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80 MW output non-reheat pulverized coal unit
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Built in 1951
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Coal-fired on bituminous coal
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Located near Goldsboro, North Carolina
This unit shares this site with two other coal-fired units, and four oil-fired gas turbine units.
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GE 6F Gas Turbine Considered
The gas turbine has not yet been selected; at this preliminary evaluation phase of the project the starting point would be a GE 6FA gas turbine.
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Plant Layout
There appears to be adequate site space available for the CHIPPS equipment to the south of existing Unit 3. This location is open and flat, but has the disadvantage of long piping distances and solids handling distances for the char transport.
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Performance
Too early in the project -- this effort not underway yet
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Environmental Characteristics
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Cost
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