General > General Technical Chat
EV-based road transportation is not viable
Marco:
--- Quote from: nctnico on February 20, 2023, 10:28:59 pm ---Again: hydrogen isn't transported in liquid form.
--- End quote ---
Dunno about trains, but a simple google search shows companies making truck trailers ... someone must be buying them.
https://www.chartindustries.com/Products/Cryogenic-Transport-Trailers
tggzzz:
--- Quote from: tautech on February 20, 2023, 11:31:35 pm ---
--- Quote from: tggzzz on February 20, 2023, 11:16:36 pm ---
--- Quote from: tom66 on February 20, 2023, 10:44:25 pm ---For a train, the biggest risk is a derailment. You could probably reduce the risk of a hazardous hydrogen leak by placing the tank towards the rear of the vehicle.
--- End quote ---
Or being rear-ended, or rear-ending.
--- End quote ---
The same concerns have been aired for decades about CNG powered vehicles.
History has shown us it's no more unsafe than liquid fueled vehicles.
--- End quote ---
Hydrogen 700 bar. LPG 25 bar. That's a significant difference.
See earlier post for refs.
tautech:
--- Quote from: tggzzz on February 21, 2023, 12:00:49 am ---
--- Quote from: tautech on February 20, 2023, 11:31:35 pm ---
--- Quote from: tggzzz on February 20, 2023, 11:16:36 pm ---
--- Quote from: tom66 on February 20, 2023, 10:44:25 pm ---For a train, the biggest risk is a derailment. You could probably reduce the risk of a hazardous hydrogen leak by placing the tank towards the rear of the vehicle.
--- End quote ---
Or being rear-ended, or rear-ending.
--- End quote ---
The same concerns have been aired for decades about CNG powered vehicles.
History has shown us it's no more unsafe than liquid fueled vehicles.
--- End quote ---
Hydrogen 700 bar. LPG 25 bar. That's a significant difference.
--- End quote ---
CNG is NOT LPG !
https://www.diffen.com/difference/CNG_vs_LPG
~200 bar (~3000 PSI) is CNG tank pressure for automotive use.
It's primary disadvantage was low BTU in an ICE which translates to limited range.
LPG is better in many respects in an ICE.
Still, we had CNG and LPG powered cars in NZ for decades after the 70's oil shock.
Ice-Tea:
Flamability range:
Activation energy:
Miyuki:
--- Quote from: tautech on February 21, 2023, 01:32:53 am ---
--- Quote from: tggzzz on February 21, 2023, 12:00:49 am ---
--- Quote from: tautech on February 20, 2023, 11:31:35 pm ---
--- Quote from: tggzzz on February 20, 2023, 11:16:36 pm ---
--- Quote from: tom66 on February 20, 2023, 10:44:25 pm ---For a train, the biggest risk is a derailment. You could probably reduce the risk of a hazardous hydrogen leak by placing the tank towards the rear of the vehicle.
--- End quote ---
Or being rear-ended, or rear-ending.
--- End quote ---
The same concerns have been aired for decades about CNG powered vehicles.
History has shown us it's no more unsafe than liquid fueled vehicles.
--- End quote ---
Hydrogen 700 bar. LPG 25 bar. That's a significant difference.
--- End quote ---
CNG is NOT LPG !
https://www.diffen.com/difference/CNG_vs_LPG
~200 bar (~3000 PSI) is CNG tank pressure for automotive use.
It's primary disadvantage was low BTU in an ICE which translates to limited range.
LPG is better in many respects in an ICE.
Still, we had CNG and LPG powered cars in NZ for decades after the 70's oil shock.
--- End quote ---
And modern CNG systems going to rise that pressure even further, with new vessels rated up to 450 bar
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version