Water vapour.The output that can be seen coming from the coach nearest the camera
Water vapour!Impressive, but what a noisy beast!
I know basically nothing about this scheme, but it is certainly interesting. The output that can be seen coming from the coach nearest the camera, what is that? I'm not sure what the by-product from using hydrogen is, it sure looks harmless but I'm just wondering what it is.
Water vapour.
As for the noise, it's certainly no worse than any existing diesel.
Water vapour!
Given the hydrogen is reacted with oxygen...
It's a little more fun to think of it as steamThanks both, it's been a few too many years since I last looked at chemistry! I was strongly of the impression it was water vapour, but I could not get the tired brain to remember for sure. Obviously, now you mention it, it's super obvious Too many long days, short nights and nowhere near enough sleep!
As for the noise, I guess so. I think I was expecting something quieter!
Strange that it's so noisy. Fuel cells are basically silent in operation, so aside from traction motor noises and compressors I can't think of what the loud fans are for?
Just playing devil's advocate here. What would happen if an accident ruptured the hydrogen tank in a tunnel?
It also moved last week but under battery power - the air compressors seemed to be the items making the most noise (I was standing next to it as it moved by). When it moved yesterday I was more aware of the track noise as it crossed pointwork etc. than any sound from the auxiliary equipment though was not quite as close.The fuel cell itself is near silent, but there's a bunch of equipment supporting it such as cooling fans, compressors and driers that will make noise.
The gas would escape upwards. I can't remember the exact details but I have seen convincing evidence that it will be no worse than any other combustible fuel source. Yes, we all know about Hindenburg but it's very different. As I say, though, I can't remember how it all works. The experts gave a very technical talk, I am a non-expert!Just playing devil's advocate here. What would happen if an accident ruptured the hydrogen tank in a tunnel?
The gas would escape upwards. I can't remember the exact details but I have seen convincing evidence that it will be no worse than any other combustible fuel source. Yes, we all know about Hindenburg but it's very different. As I say, though, I can't remember how it all works. The experts gave a very technical talk, I am a non-expert!
And very quickly, too.The gas would escape upwards.
I'm no expert, but a fire from rupture in a pipe would be different to a bag of gas made of flammable material, surely? I'm not saying it would be without risk, but we drive round in cars with tanks full of highly flammable petrol.
And very quickly, too.
The 614 isn't covered in a highly inflammable waterproof coating. It is that, not the gas (which rapidly dispersed) that did the damage in the Hindenberg.. How is the Hindenburg different. Same gas, same risk, and in the conditions I said, also a confined space.
A tunnel isn't an enclosed space, it (obviously) has portals at either end. It's different to the Hindenburg in that way, which in any event actually burned due to a coating on the skin, not as a result of the hydrogen it contained (that's not how hydrogen combusts) which rapidly dispersed.Upwards in a tunnel doesn't really exist. How is the Hindenburg different. Same gas, same risk, and in the conditions I said, also a confined space. If they're that sure, let's have a nuclear fuel type destructive test.
I knew we shouldn't have scrapped 45015Are there any spare Peaks that can be driven into a full fuel tank in a tunnel?
Good to see this progress. Is there any capability of Hydrogen trains having multiple power sources. Will this unit demonstrate that?
Loads and loads, in automotive applications. Search for Toyota Mirai Hydrogen crash test. They shot it with a bullet even, and the gas just hissed away. Not to say it couldn't ignite.I don't doubt this could be the future, but I'm genuinely concerned as to the fuel. Have any tests been done to show what happens to the tanks in an accident? If the gas simply rises away, then let us see that. That would settle the matter once and for alall.
The problem with hydrogen is still making it.Loads and loads, in automotive applications. Search for Toyota Mirai Hydrogen crash test. They shot it with a bullet even, and the gas just hissed away. Not to say it couldn't ignite.
Hydrogen tanks are a well established at many scales. Companies like Linde have been storing liquid hydrogen at 875 bar for industry for decades, it being a critical chemical reagent for chemicals and refining.
Indeed - that was in my mind with my comment above re inefficiency and heat losses. As others have said, hydrogen often looks to be a rather inefficient way to carry energy around...The problem with hydrogen is still making it.
That petrol isn't pressurised.
And when it hits the roof of a tunnel, where does it go?
I don't doubt this could be the future, but I'm genuinely concerned as to the fuel. Have any tests been done to show what happens to the tanks in an accident? If the gas simply rises away, then let us see that. That would settle the matter once and for all.