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More California gas stations can provide H2 than previously thought, Sandia study says
Date:7/8/2014

be quantified," Dedrick added. "We now know that we can build more hydrogen fueling stations if we examine the safety issues within a sound, technical framework that focuses on the real behaviors of hydrogen."

Sandia's hydrogen safety, codes and standards program is a diverse portfolio of activities funded by the Department of Energy's Fuel Cell Technologies Office to provide the technical basis for developing and revising safety codes and standards for hydrogen infrastructure, including the NFPA 2 code.

The study focuses on California, which has more hydrogen-fueling stations than any other state. A key factor in the codes that Sandia examined was the separation distances required for fueling infrastructure, including fuel dispensers, air intakes and tanks and storage equipment. The code defines required distances between such components and public streets, parking, on-site convenience stores and perimeter lines around the site.

All fueling facilities are susceptible to fire due to the presence of flammable liquids and gases, said Dedrick. According to the NFPA, more than 5,000 fires and explosions a year occurred at conventional gasoline stations from 2004-2008. "Whether you are filling your car with gasoline, compressed natural gas or hydrogen fuel, the fueling facility first of all must be designed and operated with safety in mind," he said.

"If you have a hydrogen leak at a fueling station, for example, and in the event that the hydrogen ignites, we need to understand how that flame is going to behave in order to maintain and control it within a typical fueling station," explained Chris San Marchi, manager of Sandia's hydrogen and metallurgy science group. A scientific understanding of how such flames and other potential hazards behave is necessary to properly determine and mitigate safety risks, he said.

"We're comfortable with the risks of natural gas in our homes and under our streets," San Marchi pointed out. "We
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Contact: Mike Janes
mejanes@sandia.gov
925-294-2447
DOE/Sandia National Laboratories
Source:Eurekalert  

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