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> engineer huge carbon emitters like container shipping or aircraft to run on hydrogen + solar? Why hydrogen at all then? The source is solar so let's keep it

• ncmncm 6y ago
  Really? You think solar panels on the wings would provide enough power to fly? Aircraft need concentrated energy. Batteries are nowhere near enough for anything big. Liquid H2 is the best possible fuel for aircraft, once certain practicalities are worked out, and can be produced from solar and wind.
  • Aperocky 6y ago
    OK So this is just about conversion. H2 doesn't need solar, it needs power, it doesn't care where that power came from. It's essentially a disconnected system, to sell it as if H2 somehow means solar (which I get from earlier threads) is a little bit disingenuous.
    • ncmncm 6y ago
      Not even a little bit. Wind and solar are the cheapest source of power, with their usability reduced only by surge demands. Liquifying H2 would absorb peak production and be unaffected by temporary lulls. Unless you think it would be natural to use the more expensive power instead?
      • Aperocky 6y ago
        That makes much more sense, was not thinking in terms of surges.