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5-48 SL-5641 Final Table 5-32 — Solar 200 to Solar 220 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 A. Technology B. Economy of Scale Electric Power Block Cost Improvements Plant Size – Electrical, MWe Plant Size – Thermal, MWt Capital Cost, $M Cost per installed kWe A.1 Technology Solar 200 Solar 220 SunLab SunLab S&L 200 220 1,400 1,400 148 148 Basis 2,600,000 2,642,000 17,608 17,851 $249.6 $198.8 $96 $75 2,789,322 18,847 $263.0 $94 5% 72% 0% 0% Solar 200 Solar 220 SunLab SunLab S&L The annual heliostat efficiency went from 56.1% to 57%. Major design improvements are new advanced heliostat. There is no economy of scale since Solar 220 is based on the same size heliostat as Solar 200 (148 m2). Basis C. Production Volume 95% 28% Production volume is a 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. 200 1,400 $64 $83.6 $320 $380 220 1,400 $61.8 $281 1% 80% The annual efficiency went from 42.8% to 46.1%. The increase is due to turbine advances in technology. The cost reduction from the increase in efficiency is $6.2 million. The higher efficiency turbine is estimated to cost an additional 20%. The cost reduction from increase in efficiency of $6.2 million is offset by the higher cost ($83.6 M - $64 M = $19.6 M) and increased capacity.PDF Image | Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts
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