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Chapter 5 Economic analysis • GT GAS REG PRES (1 MWel): 2500 €/kWel • GT GAS REG PRES (5 MWel): 2000 €/kWel However it is important to note that these values are referred to the power output of the mere ORC unit, therefore they must be converted into the corresponding values referred to the whole plant power output by means of a weighted average. Power output of the topping power plants must then be considered: • ICE GAS ORC: 1175 kWel • GT GAS REG PRES (1 MWel): 5100 kWel • GT GAS REG PRES (5 MWel): 5020 kWel The share of ORC generated power with respect to the overall output, always depending on the CHP or electric configuration, is then: • ICEGASORC:5÷6% • GT GAS REG PRES (1 MWel): 11 ÷ 14% • GT GAS REG PRES (5 MWel): 11 ÷ 14% Therefore, for simplicity reasons considering an average value for the last parameter, the incidence of the ORC unit on the installation cost of the whole plant is about: • ICE GAS ORC: 130 €/kWel • GT GAS REG PRES (1 MWel): 310 €/kWel • GT GAS REG PRES (5 MWel): 250 €/kWel As mentioned before, these values must finally be added to the topping plants costs (2000 €/kWel for ICE GAS ORC, 3340 €/kWel and 2440 €/kWel for GT GAS REG PRES respectively at 1 MWel and 5 MWel), thus giving the costs reported in Table 5.1. Concluding, in [4.4] a cost of about 2100 €/kWel is proposed for the hybrid biomass/natural gas solution (GT HYB) at the 100 kWel scale. In the present work a slightly more conservative value has been chosen instead, i.e. 2500 €/kWel, as shown in the table. This value is equal to two times the mere gas turbine cost: an analogous rule has then been adopted for the two larger scales (from 1000 €/kWel to 2000 €/kWel for 1 MWel, from 750 €/kWel to 1500 €/kWel for 5 MWel). An evaluation of the single components costs could show that this assumption is correct. Finally, given the specific costs reported above, it is sufficient to multiply them by 100, 1000 or 5000 to calculate the overall investment costs: results (in k€) are shown in Table 5.3 [TF] [1.8] [1.25] [2.2]. 175PDF Image | SMALL-SCALE BIOMASS POWER GENERATION
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