Evaluation of alternative steam generator designs for Atmospheric Fluidized-Bed Combustion plants: Final report. [AFBC]

Technical Report · Wed Jul 01 04:00:00 EDT 1987

OSTI ID:6342249

Dunlop, W

The Atmospheric Fluidized Bed Combustion development program at the 20 MW pilot plant at TVA's Shawnee Station is addressing several design issues related to the scale-up requirements for utility application. These include use of overbed vs. underbed feed systems for coal, limestone, and recycled solids, load following and control design for reliable operation, and economies of scale. After initial screening of several alternate configurations, conceptual designs of AFBC mechanical overbed and underbed feed power plants in 1 x 200 MW and 2 x 500 MW sizes were prepared. These designs were assessed for efficiency, performance, resource requirements, capital cost and levelized busbar costs and compared to conventional pulverized coal units of similar size. The findings are that relative to the AFBC underbed feed plants, the AFBC overbed feed plant is about $70/kW less expensive at the 200 MW size, and $20/kW more expensive at the 2 x 500 MW size. Also, the capital costs of AFBC units range from $20/kW to $130/kW less than conventional PCF units and the potential exists for further reductions in AFBC capital costs as AFBC technology improves. Levelized busbar costs are essentially the same for both types and sizes of the AFBC units and for the conventional PCF units. Only one coal, Illinois number6 - a high sulfur bituminous coal - was initially evaluated. Subsequently, five additional coals - bituminous, subbituminous and lignite - and plant locations were evaluated. Current testing of less expensive coals is expected to confirm the fuel flexibility of the AFBC units which may result in corresponding reductions in levelized busbar costs. Utility industry confidence in AFBC has recently been expressed by the planned design and construction of fluidized bed units in 100 MW to 160 MW sizes for Colorado Ute Electric Association, Northern States Power Co. and TVA. 5 refs., 38 figs., 54 tabs.

• Research Organization: Bechtel Group, Inc., San Francisco, CA (USA); Electric Power Research Inst., Palo Alto, CA (USA)
• OSTI ID: 6342249
• Report Number(s): EPRI-CS-5296; ON: TI87920511
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200101 -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
ASHES
BOILERS
CAPITALIZED COST
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
COMPARATIVE EVALUATIONS
CONTROL SYSTEMS
COST
DESIGN
ECONOMICS
ELECTRIC POWER
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
FUNCTIONAL MODELS
MATERIALS
MELTING POINTS
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PILOT PLANTS
POWER
POWER PLANTS
RESIDUES
RETENTION
STEAM GENERATORS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TENNESSEE VALLEY AUTHORITY
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
US ORGANIZATIONS
VAPOR GENERATORS