Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by petertodd on Saturday April 19, 2025 @10:01AM
(#43736487)
That's just a minor problem, not a fatal flaw. Obviously you can fix that with a small heater for negligible energy cost.
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by Filligree on Saturday April 19, 2025 @10:21AM
(#43736608)
Now you have a heater in immediate proximity to hydrogen gas.
It’s not impossible, but I think you’re underestimating the complexity of doing that safely.
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by rad_gruchalski on Saturday April 19, 2025 @10:26AM
(#43736643)
Hydrogen ignition temperature is 535°C.
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by anotherhue on Saturday April 19, 2025 @11:33AM
(#43737102)
Did you never do the science experiment? One small spark...
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by rad_gruchalski on Saturday April 19, 2025 @12:29PM
(#43737449)
Don’t smoke while fuelling your car. Unless it’s a diesel that is…
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by praseodym on Saturday April 19, 2025 @02:10PM
(#43738218)
Commercially available solutions seem to use a flow of nitrogen to purge condensation from the nozzle, which is quite a bit more complicated: https://www.weh.com/en_us/general-news/preventing-the-fuelin...
Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch...
by petertodd on Sunday April 20, 2025 @05:22AM
(#43742637)
Yes, to comply with paranoid hydrogen safety regulations cheaply. Also, note how the nitrogen is also being used to purge the entire line. Not just keep condensation away.
With more engineering work an intrinsically safe PTC heater could be certified and used just fine.
Unless the hydrogen fueling nozzle freezes to the car, which is apparently quite common in high humidity weather and/or when multiple cars are fueled consecutively. See e.g. https://www.sciencedirect.com/science/article/pii/S036031992...