Imagine if we somehow could run trains on electricity, that would be even better
this post was submitted on 17 Sep 2023
474 points (95.2% liked)
Technology
59217 readers
3414 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
They already do, they just have a diesel generator to make the electricity
Guessing that replacing that with a large battery that charges at night is unreasonable due to the torque needed? You'd probably need a battery larger than a train engine to be able to even do a few stops and starts. Which is why electric trains are wired all the time.
If someone knows for sure I'm super curious!
Is this whole thread a joke or have you people not heard of electrified rail
load more comments
(13 replies)
Trains are already pulling what 100 cars. It's easy enough to have a car that's a battery. But I think overhead lines are the way to go on the vast majority of lines.
The problem with battery trains is that locomotives hardly sit around long enough to charge unless it's some sort of switcher or in for maintenance. Really the only use case for battery locomotives outside of switchers is passenger service where it's fairly common for a train to sit for eight plus hours. Amtrak and Siemens are actually doing this with 15 of the new airo trainsets which will run on the empire line. The trainsets will specifically run on battery while within the new York city tunnels where diesel locomotives are only allowed to operate under emergency.
load more comments
(2 replies)
load more comments
(10 replies)
load more comments
(4 replies)
I don't know about Poland but I know about France (I would guess we're not so far appart on this point).
While 95% of railways are electrified, those last 5% are not very worth it to invest in, because really low traffic and hard to operate (eg. in mountains). I've already heard of compromises, like hybrid locomotives that can run on battery for more than half the line and rely on diesel for the remaining.
load more comments
(1 replies)
all trains, even the speed trains, in france run on electricity for who knows how many decades.
same trains go to great Britain, Belgium, Netherlands, Germany and maybe some other countries too.
source of the electricity is debatable though. France produces a great majority of its electricity from nuclear since the ww2 trauma.
load more comments
(4 replies)
load more comments
(9 replies)
While it may not be the best option, is it not good that somewhere is at least trying it?
As long as it’s not widespread adoption, it seems like a good idea to at least trial these sort of things on a small scale to properly determine the real world application, even if the conclusion is just “yeah, it shit”.
No! If it doesn't immediately solve the issue completely without any drawbacks it must be scrapped and no one should work to improve it!
Best regards,
Every conservative party (and their corporate sponsors).
Most of the supporters of hydrogen trains are the Oil & Gas lobby, a traditionally conservative group. It's another, "Technology will save us from climate change!" scheme, which will allow unabated oil extraction to continue so we can make hydrogen fuel.
If I may?
Hydrogen, green hydrogen, can be produced from water, using electricity produced from renewables, like solar amd wind.
My own country is in the process of converting a decomissioned refinery into a hydrogen plant.
It may not solve much in the short term but as an energy reserve, hydrogen can find use directly as a fuel or for running gas turbines to produce electricity in replacement of conventional gas.
Green Hydrogen from Electrolysis is extremely inefficient (<30%). Renewable energy isn't without cost or environmental impact, so we need to responsible with how we use it. Unless the grid you're pulling from is 100% renewable and has excess power that is just being wasted, that renewable energy could be used elsewhere in a more efficient manner.
load more comments
(3 replies)
load more comments
(4 replies)
load more comments
(1 replies)
load more comments
(1 replies)
This train is being trialed by an oil subsidiary so I think there is more than a little greenwashing going on here. The vast majority of hydrogen is "blue", i.e. it's manufactured from fossil fuels, so there is no environmental benefit to this. Even if it were "green", i.e. made from water and renewable energy, the same power used to make the hydrogen, store it, transport it, turn it back to power could charge 3 or 4 battery powered trains or tenders - a tender could mean a smaller locomotive hooks up to however many battery tenders it needs for its route or switches them out in the yard.
load more comments
(4 replies)
Hydrogen probably has some niche uses but there are some things that proponents like to gloss over.
- It's not green since most of it is produced from fossil fuels. It's also disgustingly expensive even compared to fossil fuels. I'd note that the company Orlen Koltrans which is funding this train is a subsidiary of an oil company PKN Orlen so yeah.
- Even if it were green (e.g. water electrolysis from renewables) it takes something like 3-4x the energy to produce, store, transport, and convert back to energy as just charging a battery.
- Regardless of how it's made hydrogen also contributes to global warming - if any hydrogen leaks or escapes during fueling or venting, it promotes the methane production in the atmosphere.
- It can and does go kaboom. e.g. this hydrogen powered bus has seen better days.
All said and done, I think it's crazy to even bother with the tech unless its so niche it cannot be done some other way. Japanese automakers & oil companies looking to do a bit of greenwashing have been the major proponents of hydrogen and that should say something. Also the fact that hydrogen has been a miserable failure in areas where it has been piloted.
In the case of trains it seems more sensible to manufacture biodiesel or synthetic fuels than this. It's certainly safer to transport and store. Perhaps existing trains can be converted relatively easily. Or electrify the train line or stretches of it. Batteries would be an option too - a train might simply hook up to a fresh battery tender and off it goes. Or some kind of hybrid solution that can source power from overhead lines and/or diesel and/or battery. Or even put solar on carriages to reduce fuel consumption during daylight operations. All these things seem more viable than hydrogen.
Biodiesels arent more efficent, a huge waste of land and destroying the local environment through monocultures, pesticides and fertilizers.
The most reasonable solution would be to fucking electrify the train tracks. It is a train god dammit. It runs on tracks and the track aint running anywhere else.
Biodiesels are still better than diesel and the stuff can be manufactured from seaweed, algae, any biomass really. It doesn't have to be a monoculture. It doesn't even have to be 100% biodiesel either - start blending it in. I agree electric motors and electrification are the ultimate outcome but the rail industry has a lot of lines and a lot of locomotives and and you want progression over time with options for battery, power lines or diesel, potentially all 3 on the same line in different parts. It might take decades to transition. It's certainly not hydrogen, that's for sure.
load more comments
(1 replies)
load more comments
(8 replies)
- Green hydrogen is being produced at scale.
- So what, renewables are infinite
- That’s overblown
- You think the toxic (deadly) lithium thermal runaways that can’t be stopped are somehow better? No. They are worse and a deadly underground carpark disaster waiting to happen.
- Not enough lithium in the world to supply the global suv market let alone compete with other markets and let’s not forget that the rest of the transport market…Lithium batteries are yet again another finite mined resource with the same problem as dinosaur juice.
- Rail lines won’t be electrified, they are barely being maintained as is!
load more comments
(5 replies)
The hydrogen propaganda machine is spamming lemmy. It's not green technology until fossil fuel companies don't benefit from it
load more comments
(9 replies)
Why, Poland, why? You have elecrified network, why?
German Lower Saxony recently halted developments of a hydrogen locomotive fleet, arguing that electric battery ones are cheaper to operate https://qz.com/the-dream-of-the-first-hydrogen-rail-network-has-died-a-1850712386
Nonetheless, Alstom and Siemens remain fixed on the production of hydrogen-fueled trains https://news.europawire.eu/siemens-mobility-successfully-tests-hydrogen-powered-mireo-plus-h-train-in-bavaria/eu-press-release/2023/09/16/15/35/04/121944/
Why the fuck?
Trains don't run on diesel directly. They use diesel generators to drive electric motors that actually move the train. How those motors are powered is relatively irrelevant. This just replaces the diesel generators with hydrogen fuel cells...I think. I don't read Polish well. Or at all.
But how about replacing the diesel with fucking electrified rail network?
Because now you have to build an electrified track infrastructure in instead of using an already built railway track.
cough overhead lines cough
Jeez if only smart people thought of that.
Real answer: it’s actually a lot of logistics and technical challenge to bring overhead lines to the whole of eve a small country like England. A lot of these tracks are in regions where there’s no power lines nearby. You still want the trains to go to and through these places.
load more comments
(2 replies)
load more comments
(6 replies)
load more comments
(13 replies)
load more comments
(1 replies)
load more comments
(1 replies)
view more: next ›