CONCEPTUAL DESIGN AND ECONOMICS OF A NOMINAL 500 MWe SECOND-GENERATION PFB COMBUSTION PLANT

Technical Report · Mon Sep 01 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/883189· OSTI ID:883189

Robertson, A ^[1]; Goldstein, H; Horazak, D; Newby, R

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1. Foster Wheeler Development Corporation

Research has been conducted under United States Department of Energy Contract DE-AC21-86MC21023 to develop a new type of coal-fired plant for electric power generation. This new type of plant, called a Second Generation Pressurized Fluidized Bed Combustion Plant (2nd Gen PFB), offers the promise of efficiencies greater than 48 percent, with both emissions and a cost of electricity that are significantly lower than those of conventional pulverized coal-fired (PC) plants with wet flue gas desulfurization. The 2nd Gen PFB plant incorporates the partial gasification of coal in a carbonizer, the combustion of carbonizer char in a pressurized circulating fluidized bed boiler, and the combustion of carbonizer syngas in a gas turbine combustor to achieve gas turbine inlet temperatures of 2300 F and higher. A conceptual design and an economic analysis was previously prepared for this plant. When operating with a Siemens Westinghouse W501F gas turbine, a 2400psig/1000 F/1000 F/2-1/2 in. Hg. steam turbine, and projected carbonizer, PCFB, and topping combustor performance data, the plant generated 496 MWe of power with an efficiency of 44.9 percent (coal higher heating value basis) and a cost of electricity 22 percent less than a comparable PC plant. The key components of this new type of plant have been successfully tested at the pilot plant stage and their performance has been found to be better than previously assumed. As a result, the referenced conceptual design has been updated herein to reflect more accurate performance predictions together with the use of the more advanced Siemens Westinghouse W501G gas turbine. The use of this advanced gas turbine, together with a conventional 2400 psig/1050 F/1050 F/2-1/2 in. Hg. steam turbine increases the plant efficiency to 48.2 percent and yields a total plant cost of $1,079/KW (January 2002 dollars). The cost of electricity is 40.7 mills/kWh, a value 12 percent less than a comparable PC plant.

• Research Organization: Foster Wheeler Development Corporation
• Sponsoring Organization: USDOE
• DOE Contract Number: AC21-86MC21023
• OSTI ID: 883189
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
CIRCULATING SYSTEMS
COAL
COMBUSTION
COMBUSTORS
DESIGN
DESULFURIZATION
ECONOMIC ANALYSIS
ECONOMICS
ELECTRIC POWER
ELECTRICITY
FLUE GAS
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
GAS TURBINES
GASIFICATION
HEATING
PILOT PLANTS
STEAM TURBINES