Enhancing performance-based parts of hydrogen code
One of Sandia's next objectives is to work with all parties to look closer at the underutilized performance-based parts of the NFPA 2 code, rather than the prescriptive-based elements that focus on rigid distance requirements.
"While the prescriptive sections of the code are typically implemented, there are also sections of the code that allow for the use of more risk analysis to optimize the fueling facility," San Marchi said. If station developers and others take a more performance-based approach, he said, more existing fueling facilities will be able to integrate hydrogen systems and support the developing fuel-cell electric vehicle market.
Sandia is also in the process of developing a risk-informed approach for shortening the separation distances for liquid hydrogen storage at fueling stations, as current efforts only examined separation distances for gaseous hydrogen. Liquid hydrogen is attractive because it takes up less space than gaseous hydrogen and allows fueling stations to accommodate larger numbers of fuel-cell electric vehicles. However, there are additional issues associated with the low temperatures required for liquid systems installed on small properties.
"We need to do more experimental and modeling work to understand and evaluate the science and physics of liquid hydrogen," said San Marchi. "By evaluating the risks quantitatively, we believe we can shorten the separation distances required in the code for liquid hydrogen just as we did with gaseous hydrogen. That could then lead to even more fueling stations that can accept hydrogen and support the continued growth of the fuel-cell electric vehicle market."'/>"/>
|Contact: Mike Janes|
DOE/Sandia National Laboratories