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either the base collector (selective metal-glass) or nonselective polymer collector. 4. Planned FY 2005 Activities • Continue field monitoring, out to at least one year for each system installed. • Implement manufacturing process design and begin commercialization of two low-cost SDHW systems for mild climates. • Transfer Test Protocol for ICS to SRCC. • Develop RFP for cold-climate SDHW cost reduction. 5. Major FY 2004 Publications J. Burch, J. Salasovich, C. Christensen, and J. Thornton, “Geographical V ariation in Performance of an Unglazed Solar System Meeting Water Heating and Space Conditioning Loads,” 2004 ASES Conf. Proc., ASES, Boulder, CO. J. Burch, T. Hillman, and J. Salasovich, “Cold Climate Solar Domestic Hot Water Systems: Cost/Benefit Analysis and Opportunities for Improvement,” NREL TP-550-37012, September 2004. First Cost & Cost of Savings for Glycol $3,500 14 $3,000 12 $2,500 10 $2,000 8 $1,500 6 $1,000 4 BOS Variations Collector Variations 1st Cost COSE w/O&M Fig. 4. First cost and cost of saved energy for the glycol cold-climate SDHW system. BOS variations are first, each remaining in place once done. The last four points on the curve are subsequent collector variations, from the glass- metal selective collector used in the base case. 6. University and Industry Partners The following organizations partnered in the Project’s research activities during FY 2004. Organization/ Location/e-mail Description/Title of Research FY 2004 Cost Principal Investigator Activity ($K) Share Davis Energy Group/SunEarth Dick Bourne Davis, CA dbourne@davisenergy.com ICS Development and Manufacturing. Initiated field- testing of SDHW, addressed issues from testing, including excessive leaks. 250a) 50 FAFCO, Inc. Josh Eaton Chico, CA jeaton@fafco.com Warm Climate SDHW Development and Testing. Complete new SDHW design, build and test prototypes, and refine manufacturing processes. 200a) 50 University of Minnesota Jane Davidson Minneapolis-St. Paul, MN jhd@me.umn.edu Polymer Heat Exchangers (hx) and SDHW Systems. Research on promotion of stratification, hx materials durability, and hx scaling. 250 100 a) Contract awarded in FY2003, continuation on FY 2004 funds. First Cost COSE [c/kWh] Base case One pump Polymer tank + hx Integrated piping Valve package Non-selective mtl-gls Polymer selective Polymer non-selective Polymer unglazedPDF Image | FY 2004 ANNUAL REPORT DOE Solar
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