Comment on How to Produce Green Hydrogen for $1/kg

• JoBo@feddit.uk ⁨1⁩ ⁨year⁩ ago

  quick refueling only matters if your travel distance exceeds your battery’s range (which for 95% of driving is less than 100 miles)

  This is such a non-argument. I cannot have one car for short distances and another one for road trips.

  There are no electric cars that can get me to my Dad’s and back without recharging. He does at least have off-road parking but he doesn’t have a safe charging point. I don’t have off-road parking so charging at home is not possible. Yes, I can pay over the odds to charge while I do my supermarket shop, but I wouldn’t usually use my car for the supermarket shop and I don’t want to use my car for the supermarket shop. The only option for long journeys is to take an annoyingly long break.

  Hydrogen is very inefficient, for sure. But there’s no other way to get an electric plane that can replace existing passenger aircraft. Batteries are a non-starter for heavy transport because they’re too big and too heavy to be practical. That’s why we’ve been rolling out hydrogen buses for a couple of years now.](www.greencarfuture.com/…/how-hydrogen-buses-work)

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  • greengnu@slrpnk.net ⁨1⁩ ⁨year⁩ ago

    completely fair perspective, if you are required to travel large distances outside of cities then liquid fuels would be the superior option.

    But if cities are linked by high speed rail and effective bus coverage; there would be no need for a car to visit someone. #fuckcars

    I do agree that batteries are not a good solution for planes but I believe plane use should be only for special cases that are extremely time sensitive (like organ transplant transportation) and are of high social benefit (which could justify carbon fuel usage)

    One doesn’t need batteries or combustion in heavy transport as fixed lines can just use electric wires which saves on moving weight and would make such transport more efficient that any carried fuel source.

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    • JoBo@feddit.uk ⁨1⁩ ⁨year⁩ ago

      I go to my Dad’s by train as often as possible but prices have doubled since the pandemic and there are usually two of us. It’s become impossibly expensive, which is why we bought a car last year after ten years without one. It does not get used for short journeys because the bus and the tram still work well enough, as do our feet and our bikes.

      We cannot electrify our bus routes, unless we make them entirely useless for most people. Come on. I live where I do because it’s close to the tram station. But most people need a bus to get them to a tram station. And I usually need one when I get off the tram.

      And I agree that a lot of plane travel is entirely unnecessary. But I’m not about to tell people that they can’t move to another country without waving goodbye forever to everyone they left back home. It’s an obscene proposition.

      We have got to have solutions that actually work. Green hydrogen ticks a lot of vital boxes. We just need to be very clear that the only acceptable hydrogen is Green. I know a lot of the hatred for it comes from Big Carbon trying to hijack it. But the baby should not be thrown out with the bathwater,

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      • schroedingershat@lemmy.world ⁨1⁩ ⁨year⁩ ago

        Where is the supposed 12 hour non-stop bus route that can’t be served by a current-gen battery bus?

        Also how is $3-5million per 100km supposed to be trivial, but overhead wire on 5km per 100km route is impossible?

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      • greengnu@slrpnk.net ⁨1⁩ ⁨year⁩ ago

        You are right in regards to very rural bus routes not being viable for electric buses but inside suburbs, cities and rural regions where the electric grid is already connected and in place, it is very cost effective to convert to pure electric.

        But for rural bus routes away from a connected electrical grid, hydrogen is not a solution either as it is only 30% efficient (assuming only ideal conditions) and would be better served by liquid hydrocarbons. (I see no reason to deprive developing communities from the most efficient options)

        I am in no way suggesting one would need to leave their family but one needs to understand up until the invention of the airplane, such relocation had to mean saying good bye and corresponding via mail or very rare train rides to visit with the whole family.

        Green hydrogen outside of chemical processes (where it is actually useful) is a myth designed to keep the automotive industry alive past its expiration date.

        The function of green hydrogen as an energy storage medium is better serviced by more custom chemistries as we are taking external energy to produce it (literally it would be the same as us taking CO2 + H2O + energy to produce gasoline [which we could do at the cost of $3.75/gal (if one ignores the CO2 collection costs)] using the Fischer-Tropsch process)

        So skip the dream and accept the reality that if we are needing stored energy for transportation, it is more efficient to store it as liquid hydrocarbons. But if we need to store for transient demands, batteries and flywheels are better solutions.

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  • schroedingershat@lemmy.world ⁨1⁩ ⁨year⁩ ago

    You’re trying to argue that 10-15 minutes of reliable delay on a road trip over 500km trumps hours over the rest of the year filling (and also a probably 20 minutes of delay because hydrogen filling stations slow way down and only give half a tank during heavy use).

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