The Learning Demonstration project was the largest single fuel cell vehicle and hydiogen infrastructure demonstration in the world to date, and the first time such comprehensive data were collected by an independent third party and consolidated and analyzed for public dissemination NREL has published 99 CDPs to communicate the technical results to a broad audience of stakeholders. Through seven years of real-world validation the project deployed 183 vehicles travelling 3.5 million miles through 500,000 trips, resulting in 154,000 hours of second-by-second data delivered to NREL. The project also deployed 25 hydrogen fueling stations that produced or dispensed 151,000 kg of hydrogen through over 33,000 fueling events. Both of DOE's key technical targets for 2009 were exceeded, demonstrating >250 mile range and >2,000 hour fuel cell stack durability. The third major objective of evaluatmg 3/gge hydrogen cost was met outside of this project through results from an independent panel of experts. After two project participants concluded their participation as planned in 2009, an additional two years of data was gathered from two OEMs and seven fueling stations. From this new data we found that the real world distance driven between fueling events was increasing and has reached a median distance of 98 miles. Fuel cell stack durability continues to be tracked, but projections were artificially limited to twice the demonstrated hours to minimize excessive extrapolation. Hydrogen compressors continue to be the component requiring the most maintenance at the stations, while it appears that station reliability is improving in most of the stations during the last 20% of their operation Infrastructure utilization has improved in the last two years but is still in a mode focused on geographic coverage rather than capacity utilization. Hydrogen fueling rates have dropped slightly in the last two years as some of the higher throughput stations were decommissioned and some of the latest technology stations (700 bar) were gradually brought up to full speed. For further detail on all of the results you can refer to the final report, which is available on the NREL website [11]. NREL will continue to receive hydrogen infrastructure data from California beyond this project, and we are in discussions with stakeholders about how to best continue to assess FCEV progress in the coming years.


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    Title :

    Final Results from U.S. FCEV Learning Demonstration


    Contributors:

    Published in:

    Publication date :

    2012


    Size :

    11 Seiten, 8 Bilder, 1 Tabelle, 12 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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