摘要: |
The Fire Technology Department of Southwest Research Institute (SwRI) performed a series of tests on compressed hydrogen cylinders in accordance with the Federal Motor Vehicle Safety Standard (FMVSS) 304, Compressed natural gas fuel container integrity. The main objectives concerned evaluation of the standard's validity for hydrogen cylinder testing and recommendations for improvements. Testing also referenced the International Organization for Standardization's Draft International Standard (ISO/DIS) 15869, Gaseous Hydrogen and Hydrogen Blends - Land Vehicle Fuel Tanks. All six cylinders subjected to the bonfire test successfully released their contents less than 3 minutes after exposure had begun. This implies that the cylinder designs are reasonably safe from a fire safety standpoint. However, it is the author's opinion that the bonfire test outlined in the current test procedure is not sufficient to assess a cylinder's ability to withstand a fire exposure. The test evaluates only whether the test setup can engulf a pressure relief device in flame. It is recommended that a new formal test method be developed that better addresses indicated safety issues. Better testing methods may show a need for a level of fire-resistant thermal insulation material. |