Screening analysis of solar thermochemical hydrogen concepts

by Albuquerque Sandia National Laboratories, NM

Technical Report, 2008


CSP Unique ID 190708678


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SAND Report: SAND2008-1900, March 2008.


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A screening analysis was performed to identify concentrating solar power (CSP) concepts that produce hydrogen with the highest efficiency. Several CSP concepts were identified that have the potential to be much more efficient than today’s low-temperature electrolysis technology. They
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combine a central receiver or dish with either a thermochemical cycle or high-temperature electrolyzer that operate at temperatures >600o C. The solar-to-hydrogen efficiencies of the best central receiver concepts exceed 20%, significantly better than the 14% value predicted for low-temperature electrolysis.
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