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EPA Combined Heat and Power Partnership Biomass CHP Catalog by a number of manufacturers. Fluidized bed boilers are a more recent technology, but are also commercially available through a number of manufacturers. Until recently, however, fluidized bed boiler use has been more widespread in Europe than the United States, and many of the suppliers are European- based. As shown in Table 5-6, when evaluated within the context of an integrated plant on a unit cost basis, O&M costs are higher for a smaller circulating fluidized bed processing 100 tons/day, but lower than the stoker boiler for the two larger sizes evaluated in this study. Overall Cost and Performance Characteristics A summary of the cost and performance of typical biomass steam systems is shown in Table 5-7. Table 5-7. Summary of Biomass Combustion Boiler System Cost and Performance System Biomass Fuel Characteristics Energy content (dry) (Btu/lb) Moisture content (%) Energy content (as received) (Btu/lb) 8,500 50 4,250 8,500 30 5,950 8,500 30 5,950 250,000 77 71 446.3 318.0 95 $23,250,000 $30,360,000 $121 $0.73 260,000 80 75 446.3 332.5 95 $32,250,000 $39,360,000 $151 $0.74 100 600 Stoker Boiler Integrated Steam Plant Steam output (lb/hr) Boiler efficiency (zero moisture) (%) Boiler efficiency (moisture adjusted) (%) Heat input to boiler (MMBtu/hr) Heat input to steam (MMBtu/hr) Capacity factor (%) Cost Factors Total installed boiler costs Total installed steam system costs Unit capital cost ($/lb steam) $232 Non-fuel O&M cost ($/1,000 lb steam) $3.55 Fluidized Bed Integrated Steam Plant Steam output (lb/hr) 20,000 Boiler efficiency (zero moisture) (%) 80 Boiler efficiency (moisture adjusted) (%) 67 Heat input to boiler (MMBtu/hr) 35.4 Heat input to steam (MMBtu/hr) 23.6 Capacity factor (%) 95 Cost Factors Total installed boiler costs $6,970,000 Total installed steam system costs $9,610,000 Unit capital cost ($/lb steam) $480 Non-fuel O&M cost ($/1,000 lb steam) $4.19 Source: NREL, 2003. 20,000 165,000 77 77 63 71 35.4 297.5 22.5 212.0 95 95 $1,990,000 $18,000,000 $4,630,000 $23,430,000 $142 $1.09 175,000 80 75 297.5 221.7 95 $24,510,000 $29,940,000 $171 $1.09 5. Biomass Conversion Technologies 41 Biomass Fuel Feed (tons/day) 900PDF Image | Biomass Combined Heat and Power Catalog of Technologies
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