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First Order Draft Contribution to Special Report Renewable Energy Sources (SRREN) 1 Table 4.7. Breakdown of current capital costs for typical turnkey (installed) geothermal-electric 2 projects (2005 US$) Component Concept (a) Exploration & confirmation (b) Drilling (wells to 1.5-3 km depth) 1275 38 1275 44 1008 40 800 28 750-1500 20-40 750-1700 20-40 3350 (c) Surface (d) Power facilities & plant infrastructure Total Type* 1 2 3 4 5 6 5 Hance, 2005). 6 2) Expansion project, 40-MWe single flash power plant, 200°C, wells to 7 Hance, 2005). 8 3) Expansion project, 4 x 25 MWe single flash power plant (100 MWe), 9 (From actual project installed in 2003). 10 4) Expansion project, 25-MWe single flash power plant, wells at 1.8 km US$/kWe 475 % capex 14 US$/kWe 30 % capex 1 US$/kWe 25 % capex 1 US$/kWe 24 % capex 1 US$/kWe 205-560 % capex 10-15 US$/kWe 275-425 % capex 8-12 US$/kWe 530 350 1225 3325 11 37 100 350 1225 2880 12 43 100 300 1175 2508 12 47 100 274 1782 2880 10 61 100 205-750 1215-2240 2025-3750 10-20 40-60 100 425-850 1500-2600 3400-4300 7 3 *Type: 10-20 40-60 1350 4720 100 9950 100 % capex 5 4 1) Greenfield project, 40-MWe single flash power plant, 200°C, wells to 34 14 47 11 from actual project currently in construction). 12 5) Greenfield project, 10-50 MWe condensing power plants (with data from Williamson et al. [TSU: 13 “et al.” added], 2001; Hance, 2005; Petty, 2005; Kagel, 2006; and Chevron, 2009). 14 6) Greenfield project, 10-20 MWe binary cycle power plants (estimations with data from Hance, 15 2005; Petty, 2005; Kagel, 2006; and Chevron, 2009). 16 7) Greenfield project, ~4MWe, binary cycle power plant, low temperature, wells to 2750 m depth 17 (estimations with data from GEOFAR, 2009). 18 19 Labour and material costs are estimated to account for 40% each of total project construction costs. 20 Labour costs can increase by 10% when a resource is remotely located. In addition to raw materials 21 and labour, choice of power plant size is a key factor in determining the ultimate cost of a plant. For 22 example using a single 50-MWe plant instead of multiple 10-MWe plants can decrease power plant 23 costs per kilowatt by roughly 30-35% for binary systems. The installed cost per kilowatt for a 100- 24 MWe flash steam plant can be 15-20% less than that of a 50-MWe plant (Dickson and Fanelli, 25 2003; Entingh and Mines, 2006). 26 4.7.2 Levelized cost of geothermal electricity 27 The levelized cost of geothermal power corresponds to the sum of two major components: levelized 28 cost of capital investment and operation and maintenance costs. The levelized cost of capital Do Not Cite or Quote 30 of 47 Chapter 4 SRREN_Draft1_Ch04_Version03 22-Dec-09 2 km depth (data from 2 km depth. (data from wells to 2.2 km depth depth in average (dataPDF Image | Chapter 4 Geothermal Energy
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