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Concentrating Solar Power

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Concentrating Solar Power ( concentrating-solar-power )

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3.2.4 CSP Approach The CSP Subprogram’s approach involves improving the performance of systems, reducing the cost of systems and supporting pre-commercial and commercial deployment through targeted R&D and problem solving. The performance and cost issues are captured in the LCOE metric discussed throughout this document. Each of the three focus areas is described briefly below. 1. Performance Improvement: This area of activity focuses R&D on improving the technical performance of systems through developing new system concepts, components, operational strategies, materials, and more. 2. Cost Reduction: Cost reduction, both for the systems and for individual system components, is not independent of focus area 1, but may drive the selection of new components and/or systems and materials. 3. Deployment Support: This focus area addresses the immediate needs of CSP industry partners who are in the process of fielding pre-commercial and commercial systems. These needs include issues associated with the manufacture, installation, design, and/or operation of systems and how they can best be addressed to make the deployment successful. The integration of these three focus areas is managed using the Stage Gate processes outlined in Sec. 2.4. The activities in each area are prioritized and weighted in terms of their relative importance in meeting goals and subject to the Solar Program’s annual budget cycle. At set intervals, we review the progress made on each activity and compare the progress to strategic goals and performance targets. Programmatic decisions are made based on needed R&D activities and subject to available funding levels. 3.2.5 CSP Reference System Descriptions The reference system descriptions for parabolic trough and dish systems are presented here. These reference systems are used in the systems-driven approach to define the status of current systems and to predict and measure our progress toward our 5-year and long-term targets. The solar field of a parabolic trough plant consists of long parallel rows of trough-like reflectors—typically, glass mirrors (see Figs. 3.2.5-1 and 3.2.5-2). As the sun moves from east to west, the troughs follow the trajectory of the sun by rotating along their axes. Each trough focuses the Fig. 3.2.5-1 Solar Electric Generating Stations (SEGS) in Boron, CA. National Solar Thermal Test Facility, Sandia National Laboratories, Albuquerque, NM The National Solar Thermal Test Facility (NSTTF), located in Albuquerque, NM, is operated by Sandia National Laboratories for the U.S. Department of Energy. The test facility is devoted to developing and testing next-generation systems for concentrating solar power. The facilities and staff of the NSTTF are available for use by U.S. industry, universities, other laboratories, state and local governments, and the general scientific community. The NSTTF was built in the late 1970s on 115 acres and comprises an 8-acre heliostat field and power tower, a molten-salt test loop, a rotating platform for solar-thermal testing of trough concentrators, a solar furnace, facilities for dish/engine testing, an engine test facility, and numerous buildings and specialized test equipment. Some of the tests performed at the NSTTF include: Solar-Thermal Testing • Thermal receiver for Solar 1 • Heliostat evaluation • Molten-salt receiver for Solar 2 • Molten-salt components • Trough system testing • Trough thermal/optical testing • Dish/engine systems • Dish concentrators • Flux gage testing/calibration User-Facility Testing • Air-to-ground target • Low-light laser • Radar and sensor evaluation • Thermal radiation effects • Space technology systems • Astronomy 63

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