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The goal is to achieve an HSL system with a lifetime of 20 years with reliable performance and self-correcting alignment capabilities under harsh environmental conditions. Tracking system costs will be reduced from $8,000 to $3,000, and installation costs will be reduced from $12,000 to $3,000. In addition, a less expensive plastic optical fiber bundle with improved optical performance is critical to the success of the HSL project. Currently, the HSL technology distributes sunlight via a 30-foot plastic optical fiber bundle. Significantly increasing the length of the bundle results in undesirable reductions in delivered light and can result in noticeable changes to the lighting color. In addition, the cost of this 30-foot bundle is currently $3,500. To reduce the overall cost of the HSL system, a bundle target cost of $1,000 should be achievable through improvements to the bundle fabrication process and use of an improved PMMA purification technique. The improved bundle fabrication process and PMMA purification techniques result in lower optical absorption by the optical fibers, allowing for greater bundle lengths that better maintain the intensity and color of the delivered sunlight. To address the above technical issues and to conduct our market assessment, a budget of $750 K is requested for FY 2006. FY 2006 Milestones: • Third-party market assessment of hybrid solar lighting. • Deploy two beta-test units in Texas and California. • Deploy two beta-test units at ORNL for R&D and continued test and evaluation. • Develop real-time monitoring hardware for Sunlight Inside Initiative beta sites. • Report on benefits associated with 2005 Sunlight Inside Initiative describing energy savings and user feedback. • Conduct R&D on enlarged, segmented, plastic mirror design with study of mirror wind loading and evaluation of low-cost aluminum-on- acrylic mirror coating technique. • Conduct R&D to develop, test, and implement self-calibrating tracker controller algorithm. 5. Major FY 2005 Publications Technical Seminars on HSL given at: • LightFair 2005, New York, April 2005 • 2005 Solar World Congress, Florida, August 2005. Press Coverage: • Solar Reception, Satellite Technology, September 2005. • BioReactor applications featured in Scientific American, September 2005. • HSL featured in the Popular Science What's New Section, June 2005. • Discovery Channel Canada story, April 2005. • MSNBC article on Hybrid Solar Lighting: “Bringing a Little Sunshine into Our Lives,” March 2005. Report: C. Maxey (ORNL), T. Fisher, (Agri-Grow Technologies, Inc.), and R. Anderson (University of Kentucky), “Final report for lighting design support of novel Agri-Grow fruit production facilities.” February 2005. 6. University and Industry Partners The following organizations partnered in the project’s research activities during FY 2005 (no cost share). Organization/ Principal Investigator University of Tennessee Rao V. Arimilli Protomet Corp. Jeff Bohanon Milan Machining Mark Pecharich Bennett Mirrors Alastair Bennett Location/e-mail Knoxville, TN arimilli@utk.edu Oak Ridge, TN jb@protomet.com Cicero, IL rfqmilans@milansmaching.com T auranga, New Zealand alastair@bennettmirror.com 145 Description/Title of Research Activity Research was conducted by a graduate student and professor on a segmented acrylic mirror design. Redesigned and produced solar collectors. Produced mold for parabolic acrylic mirror. Produced acrylic mirrors. FY 2005 ($K) 50 114 15 15 Solar Thermal R&D Solar Heating and LightingPDF Image | DOE Solar Energy Technologies Program
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