SMALL-SCALE BIOMASS POWER GENERATION

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SMALL-SCALE BIOMASS POWER GENERATION ( small-scale-biomass-power-generation )

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Chapter 5 Economic analysis 5.3.4 Conclusions The analysis has shown that the most interesting solutions for biomass power generation from an economic point of view are GT EXT CER at 100 kWel and ICE GAS at 1 MWel. At 5 MWel the two configurations provide similar results, even if the latter is the most performing one in case of no heat sale and thus should be preferred according to the logics of this work. Obviously, whatever stated is true from a mere numerical point of view: the actual choice of the plant configuration will then be based on various specific constraints varying from case to case. Results are extremely attractive as regards 1 MWel and 5 MWel, and they are absolutely good also at 100 kWel, especially if thermal energy recovery and sale is provided. The hybrid solution is interesting thanks to its low installation cost and plant simplicity, but generally only if heat is sold all over the year. Besides, the importance of the biomass or natural gas power input share regarding the economic performance has been demonstrated. Concerning this point, a more-in-depth analysis can finally be carried out. First of all, Figure 5.11 shows the electric energy sale price progress as a function of fuel input share, from 8 c€/kWhel in case of pure methane fuelling to 28, 26 or 21 c€/kWhel in case of biomass use only (depending on whether all-inclusive tariff or green certificates are applied). 35 30 25 20 15 10 5 GT HYB - Electricity sale price vs fuel input share 0 0 10 20 30 40 50 60 70 80 90 100 Percentage of biomass power on total fuel input [%] TO GC (K = 1.8) GC (K = 1.3) Figure 5.11 – Electric energy sale price as a function of fuel input share. 191 Electricity sale price [c€/kWhel]

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