Biomass Based Small Scale Combined Heat and Power Tech

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Figure 3.9 Annual operation hours progress for the Gussing plant, [42] Economic Evaluation An economic evaluation of the Gussing plant was done with the method explained in Chapter 1.3. The total investment of 10 M€ was taken from Hofbauer [39] and adjusted with CPI for 2007 resulting in 10.4 M€. The other plant data that was used in the economic calculations is displayed in Table 3.2, [38]. Table 3.2 Investment data for the Gussing CHP plant Data Pel [kW] 2000 Pth [kW] 4500 Pfuel [kW] 8000 nmarg Total investment Interest rate Economic lifetime Technical lifetime Annuity factor (a) Additional cost per fuel unit (b) O&M factor (c) Fuel cost (Cfuel) Annual operation hours [h] [%] 81 [M€] 10.4 [%] 6 [years] 20 [years] 20 [%] 8.7 [€/MWhfuel] 2.2 [%] 2 [€/MWh] 15 [hours] 7000 The electric generation cost is calculated in Appendix F and amounts to 93 €/MWhel. This COE seems high compared to the other engine based plants presented in this chapter, however this might be explained by that Gussing is a demonstration plant, thus resulting in high costs for development and optimization. According to Hofbauer [39] a reduction of 25% on the 44

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