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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4-13 SL-5641 Final with regards to absorptivity and better protection of the glass-to-metal seal to increase in-service lifetime. The SunLab projected HCE deployment and costs are shown in Table 4-7. Table 4-7 — SunLab Projected HCE Deployment and Costs Project In Service Number of HCE Number of HCE Accumulative Cost, $/m2 field Cost, $/unit SEGS VI 1999 9,600 9,600 43 847 Trough 2010 2015 2020 Trough Trough 100 100 2004 2007 57,216 45,700 66,816 112,516 43 34 847 762 Trough Trough 150 200 400 65,072 86,101 172,201 177,588 263,688 435,889 28 22 18 635 508 400 A comparison of the S&L estimated HCE costs and the SunLab projected costs is shown below in Table 4-8. Table 4-8 — Comparison of HCE Costs SunLab Projected Year Cost, $/unit 2004 847 2007 762 2010 635 2015 508 2020 400 S&L Estimate, $/unit 847 762 675 625 600 The heat collection elements, which constitute a major portion of the direct capital cost, currently have only one supplier (Solel). Additional suppliers will promote competition and reduce costs. A major European and worldwide specialty glass parts supplier, Schott Rohrglas, has recently announced its intent to produce this component. An increase in the number of HCEs as projected by SunLab will reduce the cost based on the experience curve cost reduction, but not to the projected $400/unit. Advanced development of the HCE is required for the higher operating temperatures in the planned molten-salt heat transfer fluid (HTF) applications, as discussed in the thermal storage section of this report. Additional development is also required to address the excess failure rates that have occurred at the SEGS plants compared

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