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    Passenger jets using hydrogen as a fuel ?

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    papa_umau
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    Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Sun 26 Feb 2017, 11:53 am

    Why liquid hydrogen may make sense for airplanes, replacing jet fuel

    If you want to find a major source of transportation-related emissions, just look up.

    Aviation currently accounts for around 2 percent of global carbon emissions, and many analysts believe its share could triple by the middle of the century if projected growth in air travel occurs.

    But finding alternatives to fossil fuels has proven much more difficult for aircraft than it has with ground vehicles.

    Read the whole report from Green Car Reports HERE




    Sadly, they are not going to use this hydrogen as a fuel in fuel-cells, producing electricity, as in ground and water vehicles, as the weight-to-power ratio of fuel-cell conversion with electric engines powerful enough to fly a passenger jet seems impossible.

    Instead, they plan to burn the hydrogen explosively in some form of gas-turbine engine that will have the thrust to push heavy aircraft into safe flight.

    Mind you one battery expert feels that supersonic flight might be possible using Lithium-Ion batteries.
    Read about this idea HERE

    This might sound like science fiction just now, but wouldn't it be wonderful if these ideas could come to eventual fruition ?


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    Angie baby
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by Angie baby on Sun 26 Feb 2017, 12:23 pm

    You really do love the science-fiction solutions to modern-day problems, don't you Papa ?

    Looking at those two ideas, I cannot see how they could actually be safe.

    The idea that a new supersonic aircraft might have it's whole wing area turned in Lithium-Ion batteries fills me with dread.

    Maybe I just don't have the same amount of faith that you have in science fiction/fact ?


    Last edited by Angie baby on Sun 05 Mar 2017, 12:23 pm; edited 1 time in total
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Mon 27 Feb 2017, 2:55 pm

    Maybe not Angie.

    I have found that over my long life that science fiction often turns into science fact and this is regularly put into use after it has been tried and found to be true.


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    Re: Passenger jets using hydrogen as a fuel ?

    Post by Hell's Granny on Mon 27 Feb 2017, 6:07 pm

    Interesting. would be good if they can find a way to use the car-like fuel cells.
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Tue 28 Feb 2017, 12:44 pm

    I think the main problem with using hydrogen as an electricity-maker, and storing this electricity in large enough quantities, ( in the proposed all-battery wings ), is that the battery-wings plus the large fuel-cell banks needed, ( to actually make the electricity ), AND the storing of liquid hydrogen in enough of an amount to keep an electric-motor-powered-plane going, would make for more problems than it solved. ( weight being the first of these problems ).

    That said, because of the atmospheric emissions coming from the exhausts of modern jets, ( burning a kind of kerosene ), something is needing to be done about this.

    Actually burning hydrogen instead of kerosene would make for a cleaner exhaust, if they went down that path.

    As an environmentalist, nobody would be happier than I would be if they could make such revolutionary ideas work.


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    Re: Passenger jets using hydrogen as a fuel ?

    Post by zathrus on Thu 02 Mar 2017, 12:51 pm

    I just cannot see it as even although kerosene is explosive, hydrogen is much more so.

    And making all of the wings of a supersonic passenger aircraft into large batteries scares the hell out of me too.
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by Hell's Granny on Thu 02 Mar 2017, 1:54 pm

    I have just had another worrying thought about Hydrogen in aircraft; as Hydrogen is so explosive, what would happen in the case of a lightning strike in flight? I know that mainly aircraft are safe due to their being no earth contact, but would that remain so using Hydrogen?

    I don't like to drag up the Hindenburg; that was caused by the earthing of the mooring line as it approached the mooring mast, but it is a worrying thought.
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Fri 03 Mar 2017, 1:44 pm

    Yes, that is another thought, as lightning is dangerous for all aircraft. Mind you, the hydrogen gas would be stored as a liquid, which is much less explosive so long as it is sealed.

    I once heard the "explosive" argument used against cars that either burn it combustibly or that make electricity from it using a fuel-cell system. The fact is that hydrogen is no more explosive than petrol or propane is and they have been using both in road vehicles for many many years.


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    Re: Passenger jets using hydrogen as a fuel ?

    Post by Hell's Granny on Fri 03 Mar 2017, 1:55 pm

    Thank you for explaining that to me, Papa!
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Sat 04 Mar 2017, 12:44 pm

    My pleasure HG.


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    Re: Passenger jets using hydrogen as a fuel ?

    Post by Angie baby on Sun 05 Mar 2017, 12:34 pm

    I think we are just too difficult to persuade that revolutionary new ideas like this will work.

    It is only after they have tried and tested such new ideas that we might become ready to accept them.

    Frank Whittle, the supposed British inventor of the jet engine, was told that it would never work and that it would be too dangerous anyway.

    In fact it was first built and made to work by a German called Hans von Ohain, who worked for Ernst Heinkel, and who specializing in advanced engines. He developed the world's first jet plane, the experimental Heinkel He 178. It first flew on August 27, 1939.

    Aren't Google and Wikipedia great for finding such stuff ? Twisted Evil
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    Re: Passenger jets using hydrogen as a fuel ?

    Post by papa_umau on Mon 06 Mar 2017, 10:52 am

    Very interesting facts Angie.

    I too thought that it was Frank Whittle that invented the jet engine.


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