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Comment by warmwaffles | Hacker News Reader

They will not be carrying the hydrogen in a compressed form. Most solutions are to carry the water and split the hydrogen and oxygen on demand. This reduces risk of explosion.

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That makes no sense, it's takes much more power to split hydrogen from water than you get out of it. Where does the power come from to split the water?

https://www.cummins.com/fuel-cells

https://www.youtube.com/watch?v=ECNO_FFk7Hw

https://www.youtube.com/watch?v=fP_1Fe6sET4

Uses hydrogen (H2) not water (H2O), again H2 has to be split from O with energy somehow.

I edited and added some videos on HHO systems. It's a demonstration of splitting the H2O on the move rather than carrying a gigantic tank of liquid hydrogen.

You're describing an 'infinite energy' device. The Cummins link does not support your claim, no credible firm or engineer will claim to be able to do this.

The maximum amount of energy you can get out of combining hydrogen and oxygen is exactly the minimum energy required to split water into it's components.

its components.

This is physically impossible perpetual motion.

If you somehow have access (on a vehicle? On the move, even?) to the _massive_ amount of energy required to split water into Hydrogen and Oxygen, just skip the hydrogen fuel cell and use the energy to move the vehicle.

There are more ways than electricity to split water: https://www.wired.com/2011/05/bio-engineering-algae-to-make-...

How efficient are algae at making hydrogen vs a solar cell splitting water with electrolysis?

How efficient is that vs just charging a battery with the solar cell?

Do you have any links I can read about solutions like this? My understanding is that producing hydrogen through electrolysis takes more energy than it produces. How would you power this in mobile applications?

https://timecube.2enp.com/

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