• kronarbob@lemmy.world
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    10 hours ago

    Take Germany that has solar and wind combined production capacity between 4 and 5 time its needs in electricity. Yet, It can not cover its needs. If you cannot produce electricity to cover your needs, you are far from being able to store an excess of your production. The last solar farm Germany was building south of Berlin had an estimated efficiency of 10%… The capacity of the power grid isn’t a light issue, and it is far from being resolved.

    So before thinking about having a full working renewable power grid, you have to rely on a working mass production system. Germany choose coal and gas, which makes their emission of CO2 for producing electricity high during most of the year

    Now take France. It has a solid capacity of electricity based on nuclear. It is among the least CO2 emitter in the world to produce electricity. Now, if their energetic politics was a future oriented one, France would ramp up its renewable capacity while maintaining its nuclear capacity (so building new reactors to replace old ones) to not loose on stability.

    Nuclear isn’t the energy of the past, nor a nostalgic one. It is probably the most efficient mass production system for electricity we have to transitionning to renewable while not messing up the CO2 emissions.

    Not all countries have ideal solar exposition, nor constant wind… Not to mention that hydroelectricity requires land specifics advantages and geothermal energy isn’t an everywhere solution, as drilling can cause problems.

    There is no miracle solution, only partially satisfying ones.
    Most of the country that have a 100% or near 100% renewable power grid rely on hydroelectricity. Which is not achievable by all.

    It’s not a race between technologies, it is a race to find the most efficient way to produce low CO2 electricity… while maintaining the confort of people and factory productivity, because, you know… Shareholders are the most important thing in the world… Apparently…

    • AA5B@lemmy.world
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      13 hours ago

      Searching for Germany, I see many articles on grid storage - basically at its infancy but exploding in popularity. I also see huge expectations on pumped hydro storage

      Seems like you’re arguing that we should stop building out these proven, low cost solutions in favor of dumping tons more money into a problematic technology that will take decades and billions of dollarseach

      • kronarbob@lemmy.world
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        11 hours ago

        The hydro storage has the same problem than the battery storage. You have to build a reliable eletricity production that cover your needs before being able to store your excess.

        How much power can you store with hydro storage ? Do you have enough land/mountain to create the artifical lakes at different elevation ? Can you store enough energy to compensate the reduced production of solar power during winter ? For now, storage is either for short periode ,(days, maybe weeks, with batteries) or limited capacity (hydro pumping). If you are interested on storage technology you should look on the CO2 storage that Italy built lately.

        It is complicated to rely on yet to develop technologies to power an entire country. Some can, they should, other can’t, and have to rely on non renewable energy.

        I’ve written than Nuclear is probably the best way to produced decarbonated electricity while waiting for good solutions for the renewable energy. I’ve never said that we should stop developping renewable. While the world spend money on an energy and water consuming technoloy like IA, it would be way more intelligent to focuse all that money on developping renewable… Yet to produce solar panel, wind turbin, concrete, we still need fossile fuel or nuclear. So giving up on it would only make things more complicated.