For safe and fast refueling hydrogen to fuel cell vehicles
(FCVs) at hydrogen refueling stations (HRSs), a refueling protocol
is under discussion at SAE J2601 to be a global standard. In order
to realize such a standard, we have to estimate the relation
between gas temperature and pressure during a refueling and for an
accurate estimation we have to correctly understand the thermal
characteristics of hydrogen tank.
Fast refueling test data has been offered by BMW-Powertech, some
test cases have been analyzed by a simulation model developed by
Monde et al. It reveals that the hydrogen temperature at the end of
refueling does not exceed 85°C for these analyzed cases. The effect
of the pressure drop between storage bank and hydrogen tank was
negligible on the gas temperature at the end of refueling, although
the gas temperature shows different profile depending on the
pressure drop. The simulation results of the model in this study
were in good agreement with the gas temperature profile obtained by
BMW-Powertech test. Current analysis shows the total heat loss to
the wall becomes smaller than 10% of the total inlet enthalpy.
