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Table 12: Levelized Cost per kWh (US$/kWh) vs. Capacity Factor MSD HFO Steam Turbine HFO Steam Turbine Coal Combustion T GO Combustion T FO#4 Small hydro Large hydro Geothermal 0% 20% 0.25 0.31 0.29 0.24 0.19 0.26 0.18 0.20 40% 0.17 0.21 0.17 0.21 0.16 0.13 0.09 0.10 60% 0.14 0.17 0.13 0.20 0.15 0.09 0.06 0.07 80% 0.12 0.15 0.11 0.19 0.14 0.06 100% 0.12 0.14 0.10 0.19 0.14 0.05 Figure 10: Screening Curves: Levelized Cost 0.35 0.3 0.25 0.2 0.15 0.1 h 0.05 0 $ p e r MSD HFO Steam Turbine HFO Steam Turbine Coal Combustion T GO Combustion T FO#4 Small hydro Large hydro Geothermal k W 0% 20% 40% 60% 80% 100% Capacity Factor 35. Dealing with the variability of geothermal costs. The preceding analyses show that geothermal is competitive for a nominal investment cost of $2500/kW. However, in the case of this resource, the actual cost may be much higher (Table 13). Given the variability of geothermal costs, the question is therefore: how high can the investment cost of geothermal become before it ceases to be competitive? This can be accomplished by comparing geothermal with similar base- load plants, such as steam turbines on HFO or coal, medium-speed diesels on HFO, and– eventually–certain hydro plants. 36. Comparing geothermal against steam turbines based on HFO or coal using the investment and fuel figures of Tables 1 and 2 yields breakeven costs of $7,000 per kW for the HFO steam turbine and $5,900 per kW for the coal-powered steam turbine. This indicates that investments costs for geothermal could be as high as $5,900 per kW and remain competitive against the coal- 18PDF Image | Drilling Down on Geothermal Potential Central America
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