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Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts

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Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts ( assessment-parabolic-trough-and-power-tower-solar-technology )

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5-46 SL-5641 Final Table 5-31 — Solar 100 to Solar 200 Cost Reduction Comparison Heliostat Cost Improvements Plant Size – Electrical, MWe Plant Size – Thermal, MWt Heliostat Size, m2 Field Area, m2 Number of Heliostats Capital Cost, $M Cost per m2 B. Economy of Scale Electric Power Block Cost Improvements Solar 100 SunLab 100 700 148 1,311,000 8,858 $141.2 $107 57% Solar 100 SunLab SunLab S&L Solar 200 SunLab 1,400 148 S&L Basis 2,600,000 17,608 $249.6 $96 0% 2,667,099 18,021 $330.0 $124 200 A. Technology 35% 5% The annual heliostat efficiency went from 56.3% to 56.1%. Major design improvements include the enhanced azimuth drive, elevation drive, and communication equipment C.1 Production Volume 8% 95% Production volume is the largest contributor to the cost reduction. As the volume increases the cost per unit decreases by three factors: fixed cost decrease proportionally to the number of units produced, volume purchasing discounts, and learning curve from repetitive assembly improvements. Solar 200 There is no economy of scale since Solar 200 is based on the same size heliostat as Solar 100 (148 m2). Basis The annual efficiency went from 42.3% to 42.8%. The turbine generator design is based on proven standard industry technology. The economy of scale is the major cost improvement. Plant Size – Electrical, 100 200 MWe Plant Size – Thermal, MWt 700 Capital Cost, $M $40 $64 Cost per installed kWe $400 $320 A. Technology 1% B. Economy of Scale 99% 1,400 $46.2 $231 1% 99%

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