3 ms·

Solar is completely sufficient for 99% of applications.

• iso1631 4y ago
  How do you power a moon base with solar? 14 days of battery? Fine. How do you power a Europa base with Solar? A Neptune probe?
  • rini17 4y ago
    Since we're talking in present tense that's the remaining 1%. Moon base can be fine with power beamed from a satellite or plain mirrors in orbit, no atmosphere in the way. Might end up being still cheaper than hauling nuclear reactor there plus all the infra to reliably dump waste heat from it.
    • iso1631 4y ago
      "Solar and wind power are not sufficient for spacecraft" I guess you're right that solar is useful for 99% of spacecraft -- in that they use it currently. Not a very useful observation "and many other applications" Power in polar regions. How well does Solar work in Antarctica? Or Alaska for that matter?
      • moloch-hai 4y ago
        It works super-great, collected in the tropics and shipped in chemical form. Before you object to depending on imported liquid fuel, consider that most of the world does already. The main difference is that literally anybody can make it, not just "oil exporting countries" and "fuel refiners". And, will. And export excess production when local tankage is full.
        • iso1631 4y ago
          Last I looked, round-tripping solar via liquid fuel and back to electricity was under 2% before transport costs
          • moloch-hai 4y ago
            Maybe look again without assuming hydrocarbon. Ammonia is a good transport medium, liquid at room temperature under low compression.
  • rbanffy 4y ago
    > How do you power a moon base with solar? 14 days of battery? Either that or a place near one of the poles where you get water and lots of sunshine. A small fission reactor is a handy thing to have, however. > Fine. How do you power a Europa base with Solar? A lot more solar panels, or wire loops harnessing Jupiter's magnetic field and Europa's momentum, etc. Fission is still cool for that. > A Neptune probe? Now we enter the nuclear fission territory. Maybe fusion, some day.
  • moloch-hai 4y ago
    Laser beams from solar concentrators are likely until aneutronic fusion pans out, if ever. Maybe after that, too.
  • floxy 4y ago
    >How do you power a moon base For those interested in near term answer: https://www.nasa.gov/mission_pages/tdm/fission-surface-power/index.html https://www.nasa.gov/mission_pages/tdm/fission-surface-power...
• courgette 4y ago
  Honest question, because I want that to be true at scale. Do we know how to store it properly yet? How does solar pan out in case of surge ( eg : very cold winter night )
  • rini17 4y ago
    I think parent was talking about space applications. Anyway unlike fusion, seasonal thermal storage is viable and available now, and will be scaled up in immediate future. Also, with electrical vehicles inducing massive investment into the grid, there will be both pressure and resources to solve the rest.