United States Department of Transportation
i
Localized Fire Protection Assessment for Vehicle Compressed Hydrogen Containers
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2010-03-01
[PDF-903.80 KB]
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Edition:Final Report
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Abstract:Industry has identified localized flame impingement on high pressure composite storage cylinders as an area requiring research due to several catastrophic failures in recent years involving compressed natural gas (CNG) vehicles. Current standards and regulations for CNG cylinders require an engulfing bonfire test to assess the performance of the temperature activated pressure relief device (TPRD). In the case of real world fires which are often localized at a point distant from the TPRD, the structural integrity of the cylinder can be compromised to the point that rupture occurs before the TPRD activates. This failure mode has become an area of concern for standards developing organizations (SDO's) drafting requirements for high pressure hydrogen storage systems. They have called for research to develop a localized fire test based on real world fire conditions, and assessment of mitigation technologies, which are documented in this report.
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