I remember watching a video about how many hydrogen tanks would be necessary to have the same autonomy as existing cars (I honk this was relates to Toyota's hydrogen engines). It required an entire trunk full of compressed gas.hopefully this will change things.

Could be. Too early to tell.

That sounds interesting, but I assume that sorta speed is the theoretical maximum for the engine, not what they're expecting from the plane itself? At mach 12 it must be very fucking harsh on both the frame and the surface of the plane

Hydrogen is clear or slightly blue in its liquid form. I'm sorry, but whoever is sold you green hydrogen ripped you off.

Other systems have to produce hydrogen at atmospheric pressure or close to it. It has to be pressurized later. This one can produce hydrogen already at a high pressure.

Crucially, the system can produce hydrogen at pressure, simplifying downstream compression and widening its industrial utility.

Are other electrolysers not able to generate hydrogen under pressure? From my rudimentary understanding of electrolysis, it is unclear to me how or why pressure would impact electrolysis.

Hydrogen still accounts for under 2% of Europe’s energy mix, and much of it is produced from natural gas

This is still baffling to me. There are many articles about how solar and wind farms have to cut off their electricity because they generate too much of it. The solution to me seems obvious: generate hydrogen, don't let it just go to waste. I have a few guesses why but would love to be able to speak to operators of those farms and hear it straight from them.

Ok, that wording was confusing. I assume that means it can now pump 900MW worth of generated hydrogen through the pipes.

HyMarnham produces hydrogen. It will send that hydrogen to those energy intensive industries.

The pipeline would increase HyMarnham Power’s production capacity to over 900MW, a 60-fold increase on existing capacity. Plans were unveiled at the East Midlands Hydrogen Summit.

I don't understand. Does HyMarnham produce hydrogen or consume hydrogen for energy production? The article days it'll connect energy intensive industries, so does that mean they will create hydrogen as a byproduct which will be sent to HyMarnham to produce energy? The article doesn't make it clear.

Right in time for the centenary

Next step, Uncarbonated Beer? I've been waiting for this my whole drinking career!

Hindenburg disagrees with you. But seriously, imagine a huge tank full of hydrogen catching fire. It'd be definitely brief and would leave a devastation all around. You can also imagine that small gas tanks used for home cooking...

No, it most probably isn't. And hydrogen is much more flammable.

It's not (just) about the cost, but the technology and safety of storing huge amounts.

What about the storage? If one is serious about hydrogen, a huge storage capacity would be required. Price, specially with growing solar panels like mushrooms and negative electric energy prices during sun days, isn't that important.

Fuel cells are totally underrated. I don’t know much about them for vehicles but they’re a way underutilized tech. I always loved to see them spring up when we built hospitals or banks, but they were mostly for alt systems and rare. Diesel generators were still the preferred.

Only issue I see here is with maintenance. Hydrogen vehicles have to be well maintained. It’s easier for commercial sector to guarantee that regular maintenance than for individuals.

You need to split the hydrogen first, its energy intensive, google it. Solar, wind etc we just charge a battery directly

The more steps in converting from and to energy is losses. If you have renewable energy a battery storage system that can be used directly by a motor, is more efficient than splitting hydrogen, then having to 'burn' it to produce electricity later.

It takes a lot of energy to extract hydrogen from other compounds. This means that more fossil fuels are needed to produce hydrogen fuel.

Hydrogen fuel cells are not as efficient as batteries and cannot store as much electricity.

You have to strip the hydrogen out of something which takes energy

AFAIK the Germans already have/make diesel/hydrogen hybrid submarines since >20 years.

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https://en.m.wikipedia.org/w/index.php?title=Type_212A_submarine&wprov=rarw1