Posted on 03/04/2023 7:28:39 AM PST by volunbeer
Just a few thoughts on this.
Hydrogen as a fuel has a low BTU per pound value.
Hydrogen as a fuel must be carried in a pressure vessel.
The pressure vessel fuel container weighs much more than a petroleum based aircraft fuel container.
I don’t have any figures to quote but I would guess that the combination of a hydrogen fuel cell and the electric motor used to drive the propeller of this aircraft would weigh more than a typical aircraft engine.
When it come to aircraft extra weight equals slower airspeed and less range.
I don’t see hydrogen as a practical fuel for aircraft.
Those elves have to eat, you know. It’s a little-known fact that a workshop full of elves produces as much methane as a whole herd of cows.
Hydrogen must be separated from water using electrolysis. That requires energy. Where did the energy come from?
Much less how much more energy was required for the electrolysis than was able to gained from the Hydrogen.
Lol... details.
If the antinuke unscientific idiots of the seventies hadn’t prevailed in halting development we would be much better off. “Party of science” /s
It is deliberate that they are not willing to accept any viable alternatives. It’s not a war on “pollution”..... it’s a means of controlling and suppressing human activity.
There are some reasons for optimism.... look at France. The only nation that is meeting their “climate goals” and they are doing it through nuclear power. It will be interesting to see if Germany follows in their footsteps because the German economy requires cheap and plentiful electricity.
I wish that Trump would announce a nuclear renaissance for the United States if he were elected with a focus on new and improved nuclear power plants. He could even “sell” it by talking about how “clean” it is in comparison to other sources.
No carbon is emitted during the manufacture of any components of the craft? And just the travel creating man mad air currents could cause an outbreak of more severe hurricanes and stuff. Anyone remember the Hindenburg?
Good info. But the bottom line is that there is no free hydrogen. The byproduct of burning it is harmless water vapor, but hydrogen itself is a byproduct of other processes that are not exactly “green”.
Chem Engineering 101: virtually none of our hydrogen is made buy electrolysis. Over half is produced by steam reformation of methane, I.e. a wonderful use of our abundant natural game. Coal and biomass gassification and partial oxidation as well.
This kind dof application makes sense as the H2 plant can be located at airports, the only places where the planes refuel
Where did the energy come from?
Holes in the wall. They are everywhere!
Yes, I would have no problem with a country running on nuclear power. I might even be willing to buy an electric car (or bike). But I know the greenies won’t like it for political reasons. They use their global warming scare to sell socialism. They even admit it sometimes.
My dad witnessed that in person.
Uninformed FReepers who buy into the false assumption about electrolysis would never accept a similarly false claim about say, vaccines or climate change...
Point taken, but hydrogen production still requires other energy sources. It doesn’t just occur freely, like oil or nuclear.
Good points and I think you are right - it is the same with LIB’s (lithium ion batteries) in that weight is a big problem.
I am not a proponent of the tech one way or another outside of my belief that hydrogen as a “transportation fuel” would benefit from nuclear power.
I am a BIG proponent of nuclear power and our Navy demonstrates quite well that it can be viable and safe at scale for power generation.
It is interesting that Toyota is committing a lot of resources into hydrogen vehicles as part of their “all of the above” approach (a much better business model).
Natural Gas!
All the other sources require more BTUs of energy to isolate the hydrogen than the hydrogen itself can produce!
Agreed
Yeah - are they sure it was the first?
Fermintation also gives off carbon dioxide. There have been articles about how beer is causing global warming.
Still requires an energy input (steam). Hydrogen is not an energy source, it is an energy storage mechanism.
Gaseous hydrogen requires a lot of volume. Liquid hydrogen requires cryogenics and still takes up a lot of volume.
And hydrogen leaks, causes embrittlement and is generally one of the more unfriendly substances to store.
Even though hydrogen is academically better as a rocket fuel, the one rocket company absolutely dominating the market uses kerosene and methane because they are far easier to use.
Ultimately, hydrogen as a fuel is a scam in all but niche uses.
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