Performance of Hydrogen Storage Tanks of Type IV in a Fire: Effect of the State of Charge

The use of hydrogen storage tanks at 100% nominal working pressure (NWP) is expected only after refuelling. Driving between refuellings characterised by the state charge SoC <100%. There experimental evidence that Type IV tested in a fire initial pressures below 1/3 NWP, leaked without rupture. This paper aims understanding this phenomenon. numerical research has demonstrated heat transfer from through composite overwrap NWP/3 sufficient to melt polymer liner. melting initiates microleaks before it loses load-bearing ability. fire-resistance rating (FRR) defined as time rupture tank or with blocked thermally activated relief device. dependence FRR on for material properties and volumes range 36–244 L. A wall thickness variation shown cause safety issue reducing tank’s suggested be addressed manufacturers OEMs. effect burst ratio investigated. Thermal parameters wall, i.e., decomposition temperatures, are simulations failure play an important role its FRR.