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> Isn't cheaper turn the electricity into liquid hydrogen?! Creating hydrogen is about 80% efficient, so you do lose a fair bit in the process. > Hydrogen can
by dukeyukey 5y ago
> Isn't cheaper turn the electricity into liquid hydrogen?!
Creating hydrogen is about 80% efficient, so you do lose a fair bit in the process.
> Hydrogen can be stored for months, delivered by car, tubes, ships,
That's the thing about hydrogen, it's tricky to store for long periods of time. It leaks real easy. And liquid hydrogen isn't very dense, about 7% of that of water, so it's hard to ship it in bulk. And at the point you're piping it, well you may as well just pipe the electricity direct.
- BenjiWiebe 5y agoAnd if you do store it, it has a nasty tendency to weaken it's container.
- ncmncm 5y agoThat tendency is usually exaggerated. At LH2 temperature and atmospheric pressure, it is not a problem. You get such troubles storing H2 at high pressure and temperature.
- labawi 5y ago> isn't very dense, about 7% of that of water That's not a good metric. Hydrogen has about 2-3x energy density per mass vs carbon fuels. H₂ is about 120MJ/kg, while carbon fuels are about 35-55 MJ/kg, gasoline/diesel is 45 MJ/kg. Per volume, gasoline - 34 MJ/l, liquid methane 22 MJ/l, liquid hydrogen 8.5 MJ/l. Much smaller, but not laughable 7% (14x).