cross-posted from: https://lemmy.world/post/49581602
You must log in or register to comment.
- Noobnarski@lemmy.worldEnglish5 days
So useless, just use overhead lines or batteries.
Hydrogen is just so much less efficient that it doesn’t make sense except for industrial processes where there is no alternative.
The train line close to us already switched to battery trains and most other lines are overhead powered. And then the battery train just charges when it gets to parts of the tracks where there is overhead lines, no extra infrastructure needed.
- boonhet@sopuli.xyzEnglish5 days
Yeah… It makes a modicum of sense for cars where overhead lines are impractical and batteries heavy…
But TRAINS? Didn’t we figure out electrification of trains via overhead power lines idk… nearly 150 years ago apparently? Quite literally the easiest mode of transport to electrify…
- fruitycoder@sh.itjust.worksEnglish4 days
I genuinely wonder what the costs comparison looks like for these options.
I could see the use case for hydrogen as a battery, in rural areas where transporting power over wire would be cost prohibitive. The added benifits being that if you used most of the fuel in between electrified lines you lose the weight of the fuel unlike batteries.
- CheeseNoodle@lemmy.worldEnglish5 days
Eh its still a win, a large scale test cast for a still fairly unproven technology is bound to provide some useful information.
- bitteroldcoot@piefed.socialEnglish7 days
And where do they get the hydrogen???
Fossil fuel… But you really have to dig to find where they admit it.
Last time this came up it was buried in the documentation about how wind and solar don’t provide enough.- Dr. Moose@lemmy.worldEnglish6 days
In all fairness hydrogen is good battery store for green energy too.
- SaveTheTuaHawk@lemmy.caEnglish5 days
it’s awful. WTF. Takes huge energy to keep it cryogenically stored.
- Dr. Moose@lemmy.worldEnglish5 days
Where are you getting that it needs to be “cryogenically stored”? It’s mostly stored as compressed gas.
The main problem with hydrogen is stores only 40% but with green energy surplus and 40% is better than 0% and hydrogen store systems are quite cheap and mature/simple so still relevant in highly developing areas like those of India.
It’s still a good battery for these specific niches so I wouldn’t discount this as some big oil propaganda
- Log in | Sign up@lemmy.worldEnglish5 days
No. No it isn’t. That’s not how it’s made and not how it’s used. Its overwhelmingly made by the fossil fuel industry and calling it green in any sense is just greenwashing mostly the worst environmental problem generators the world knows.
7 daysNo specialist or anything, but I imagine most of the kaboom potential is puncture-based. I don’t expect much to make it to the heart of a train as trains generally win in collisions.
Pressure vessel fatigue is possible too, but generally rated and tested well above pressure relief valves.
- frongt@lemmy.zipEnglish7 days
Depends on how you define “win”. It only takes one small hydrogen leak for a catastrophe. A train will wreck any car or truck for sure, hit or miss with another train, but even a simple derailment of tanker cars often results in a significant mess.
There are nuclear rail transport containers that have been tested in collisions, and they’ve never leaked, but they’re very big and heavy for not a whole lot of volume. And they’re sealed, while a fuel tank needs holes to let fuel in and out.
Luckily hydrogen floats upwards pretty quickly. So paradoxically, storage tanks are safer the less protection they have around them. Or at least, above them.
- Log in | Sign up@lemmy.worldEnglish5 days
Just as well trains and other vehicles don’t have roofs then.
Fun fact: Unlike natural gas, which needs enough oxygen and enough gas to explode, hydrogen is explosive at almost any concentration of hydrogen and oxygen!
Boom! Woohoo!
