5 ms·

Yeah, this doesn't make sense. Also the problem isn't getting hydrogen, its to burn the hydrogen for energy efficiently and safely, which we currently have not

• maxerickson 10y ago
  You can buy an H2 Toyota. https://ssl.toyota.com/mirai/fcv.html https://ssl.toyota.com/mirai/fcv.html There are also house scale fuel cells (that reform natural gas).
  • marcosdumay 10y ago
    Got any reference on the efficiency and longevity of their fuel cells? Hydrogen fuel cells have a sweat spot at around 30% efficiency lasting for several years, and another at around 50% efficiency lasting for a few months. I have never seen anybody get a different set of numbers.
    • maxerickson 10y ago
      No idea. 30% is competitive with an internal combustion engine though. (and for a heated house you'd get better effective efficiency because the waste heat can be utilized)
      • marcosdumay 9y ago
        They are competing with batteries, not combustion engines. That's because the hydrogen must be generated somehow (and stored). If you go and generate the hydrogen from natural gas (so you have a natgas powered car, not much gain) you'll have to multiply those by a 40% to 50% conversion efficiency. If you generate it from water and electricity, your equivalent battery will have that 30% efficiency multiplied by another ~30% efficiency of electrolysis.
    • greglindahl 10y ago
      The Toyota hydrogen fuel-cell car has a high price and not so great performance, so it's safe to say that the answer to your question is "not good enough for a car, yet".