this post was submitted on 03 Dec 2024
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How about investing in grid energy storage, to cope with intermittent production?
They are. Modeling has shown that getting Australia to 98.8% renewable is highly achievable.
https://cosmosmagazine.com/technology/energy/grid-renewable-electricity-simulation/
Austrailia is one of the best places in the world to do that, but it should be pointed out that the article you linked wants 120GWh of batteries (costing ~12 billion USD at current Li-ion prices) as well as building more than 38GW of wind power and 30GW of solar power in order to meet ~25GW of average demand and that still needs pumped hydro on top and more than 9GW of fossil fuel power to make up the gaps.
It's just about feasible in Australia with excess sun and wind, plenty of empy space, low population density and terrain amenable to hydro storage. But it isnt realy generalisable to most other places.
30GW of solar is not much. Germany built 13GW this year.
Germany has more than 3 times the population of Australia, and the article linked needed to be able to generate 30GW peak so likely required more installed capacity, and solar is only 1 element out of 5 required in that scenario.
Again it does seem to be feasible to get renewable only in Australia (or close to) but I dont think that tells you much about elsewhere
There are plenty of options to choose from, but only few are actually industrial grade at the moment. So many promising ones are still in pilot stage, and I’m really looking forward to seeing which ones actually prove to be viable.
Traditional lithium based batteries clearly aren’t it, but LFP looks ok though.
The salt batteries will be even cheaper than lfp, they just take even more space, but we got lots of space to put batteries.
Exactly. Grid energy storage doesn’t have to be light or small. It’s not going anywhere, and you can build such facilities in remote locations.
Who cares if it weighs as much as a factory and takes the same space. You could go with molten calcium, redox flow batteries or even wilder technologies.
What about high energy use industry running only during excess supply. Making aluminum, desalination, even training AI models. There are a lot of energy guzzlers that don't NEED to run 24/7. Why can't they be a sink for excess power?
As a part of grid balancing, we are already doing that to some extent. For the most part, the idea is that you can increase or decrease the load if you see the frequency of the grid beginning to drift off target. These types of frequency containment reserves can usually react very quickly, which means that most industrial processes don’t qualify.
However, since the duck curve is fairly predictable, we could (and should) extend this idea to slower processes too, such as the ones you mentioned. I don’t know if that sort of power reserve is actually being implemented, but it certainly would make a lot of sense.
It’s just that most industries prefer to operate 24/7. Having your reverse osmosis, electorlysis, electrowinning, arc furnace etc. running only during sunny hours is nice for the employees but bad for business. The investors of such factories prefer to see profits sooner rather than later, and restricting operating hours isn’t helping.
Cheaper electricity would obviously result in lower operating expenses, so I can definitely see some potential in this idea. You would just need to find some environmentally minded investors. They would also need to tolerate the risk that comes with a fluctuating power supply, which could be a tall order.
If the fluctuations of the local energy market are dominated by solar power, that means more work during the day and none during the night. If there’s lots of wind in the mix too, that could mean lots of night shifts during windy seasons and none during others, which isn’t great for the employees.