Zero Emission Bay Area (ZEBA) Fuel Cell Bus Demonstration : Second Results Report
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Zero Emission Bay Area (ZEBA) Fuel Cell Bus Demonstration : Second Results Report

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      This report presents results of a demonstration of 12 new fuel cell electric buses (FCEB) operating in Oakland, California. The FCEBs have a fuel cell dominant hybrid electric propulsion system in a series configuration. The bus manufacturer—Van Hool— fully integrated the hybrid design, using a Siemens ELFA 2 hybrid system; UTC Power’s newest-design fuel cell power system; and an advanced lithium-based energy storage system by EnerDel. The first results report was published in August 2011, describing operation of these new FCEBs from September 2010 through May 2011. New results in this report provide an update through April 2012. The 12 FCEBs operate as a part of the Zero Emission Bay Area (ZEBA) Demonstration, which also includes two new hydrogen fueling stations. This effort is the largest FCEB demonstrationin the United States and involves five participating transit agencies. The ZEBA partners are collaborating with the U.S. Department of Energy (DOE) and DOE’s National Renewable Energy Laboratory (NREL) to evaluate the buses in revenue service. NREL has been evaluating FCEBs under funding from DOE and the U.S. Department of Transportation’s Federal Transit Administration (FTA). NREL uses a standard data-collection and analysis protocol originally developed for DOE heavy-duty vehicle evaluations. Since the last report, there have been multiple accomplishments. The last three of the 12 FCEBs were delivered and began full revenue operation • One of the two new hydrogen fuel stations opened (at Emeryville Division). AC Transit and its transit agency and manufacturer partners have been ramping up.service of the new FCEBs, including troubleshooting, maintenance, and training for.all involved (as shown in the report with increasing availability and miles.accumulated). The FCEBs have operated 272,968 miles and 29,039 hours on the fuel cell power systems, with an average speed of 9.4 mph, as well as use of 38,168 kg of hydrogen. More than one million passengers have used the buses. Three of the fuel cell power systems (from UTC Power) have accumulated significant hours of service without fuel cell stack maintenance or significant power degradation (more than 12,000 hours, 10,000 hours, and 7,500 hours). This second results report provides data analysis summaries of FCEB operations beginning in September 2011, when the buses were moved to Emeryville Division, through April 2012. This data period focuses on operation from that Division and use of the new hydrogen fueling station which was designed by Linde LLC and Jacob engineering, and constructed by a local Bay Area contractor. Linde supplied the hydrogen equipment and Proton Onsite supplied the electrolyzer.
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