Liquid hydrogen vehicle’s development
Toyota has finally unveiled a GR Corolla fueled by liquid hydrogen.
GR Corollas competing in previous Super Taikyu events were fueled by gaseous hydrogen, this official test featured a GR Corolla using liquid fuel.
The car ran three sessions on the day. This test simulated real race conditions, including sharing the track with other cars and refueling within designated times.
Driver Masahiro Sasaki explains the challenge. “We’re fighting to create a future for the internal combustion engine by tackling a technology deemed unfeasible for cars, in the uncharted territory of -253°C.”
“While various hurdles still remain, as with gaseous hydrogen we hope that our agile development on the racetrack will feed back into everyday cars,” says a determined Sasaki.
With development ongoing, the team is aiming to compete in the 2023 Super Taikyu season that kicks off this month. Doing so will accelerate efforts to expand fuel options in pursuit of a carbon-neutral society. Until last year, the hydrogen-powered Corollas had been fueled by gaseous hydrogen. In general, the ability to run on a liquid fuel boosts the energy density per unit volume and increases driving range.
For gaseous hydrogen, tanks are filled at high pressure and must therefore be cylindrical. When the fuel is in a liquid state, however, there is no need for tanks to be pressurized. In the future, fuel tanks could be shaped conveniently for under-floor mounting, offering the potential to improve packaging efficiency.
Switching the fuel from gas to liquid also allows for more compact mobile hydrogen stations.
Liquefaction reduces the required size of transport trucks and eliminates the need for facilities that boost pressure up to 70MPa. This shrinks the footprint of a station to about one-quarter of that needed for gaseous hydrogen. As with gasoline vehicles, refueling could also be done in the pit area.
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