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IDENTIFYING ENVIRONMENTALLY PREFERABLE USES FOR BIOMASS

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IDENTIFYING ENVIRONMENTALLY PREFERABLE USES FOR BIOMASS ( identifying-environmentally-preferable-uses-for-biomass )

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BC Bugwood Envirochem Services Inc. feedstock. Only 50% of the annual heat produced is used for space heating; the remainder is rejected through air heat exchangers. A diesel generator will be retained for peaking power needs, but strongly reduced in output (or replaced by a smaller unit). Table 4.3.2 Annual Cost Overview for a 2 MWe Entropic CHP Plant (165 m3/day @ 95% utilization “on-grid”) Cdn$ per year Comments Capital cost $ 4,250,000 Total of all equipment Salaries $ 120,000 Based on Annual Salaries table Maintenance $ 212,500 5% of annual capital cost Feedstock harvesting $ 1,545,031 Harvesting cost only (@ $68.55/bd tonne) Feedstock transport (100km) $ 530,254 Truck transport ($4/m3 + $4.5/100km) Annualized Cost $ 2,407,785 Electrical Power Sales $ 998,640 16,644 MW-hr @ $60 /MWe 'on-grid' Heat Sales (50% utilization) $ 2,250,000 3,750,000 litres @$.6/ litre heating oil Incentives $ 166,440 RPPI ($10/MWh) Carbon Credits $ 245,958 0.24 t/MWh + 86.1 t/TJ @ $15/tonne Annualized Revenue $ 3,661,038 Profit $ 1,253,253 ROI 26.73% IRR over 10 years Profit ($40/m3) $ 409,177 ROI ($40/m3) -0.68% Table 4.3.3 Annual Cost Overview for a 2 MWe Entropic CHP Plant (165 m3/day @ 95% utilization “off-grid”) Cdn$ per year Comments Capital cost $ 4,250,000 Total of all equipment Salaries $ 120,000 Based on Annual Salaries table Maintenance $ 212,500 5% of annual capital cost Feedstock harvesting $ 1,545,031 Harvesting cost only (@ $68.55/bd tonne) Feedstock transport (50km) $ 383,752 Truck transport ($4/m3 + $4.5/100km) Annualized Cost $ 2,261,283 Electrical Power Sales $ 2,995,920 16,644 MW-hr @ $180 /MWe 'off-grid' Heat Sales (50% utilization) $ 2,250,000 3,750,000 litres @$.6/ litre heating oil Incentives $ 166,440 RPPI ($10/MWh) Carbon Credits $ 313,366 0.51 t/MWh + 86.1 t/TJ @ $15/tonne Annualized Revenue $ 5,725,726 Profit $ 3,464,443 ROI 81.30% IRR over 10 years Profit ($40/m3) $ 2,620,367 ROI ($40/m3) 61.13% These examples indicate the effects of size on the CHP economics. On a direct comparison it appears that the 2 MWe CHP system would be favoured over the 250 kWe CHP system. However, as was noted above, the economic justification is often different for small users. For instance, the 250 kWe system would be best suited for smaller communities. For such a community that is “off-grid” with power supplied by diesel generation, the cost of power is high (if unsubsidized). At $180 / MWe for diesel electricity, the simple ROI for the 250 kWe system is about 38% of capital investment whereas the larger plant provides over 80% return. Page 46

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