this post was submitted on 19 Feb 2024
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Building a huge concrete plant has lots of CO2 emissions. Why wouldn't you include the construction in the CO2 emissions budget? Also, the waste heat from the plant fucks up a local waterway. It's required to be on a body of water, and no one is going to want to swim there anymore.
Windmills? You just stick them where there's wind. They don't bother anything. Construction is minimal and you can still use the land for something else.
Wind turbines come with their own environmental impact due to construction, among that is CO2. Besides that they are highly visible, to the point where I can't look at the horizont where I live, in any direction, without seeing a few, but most importantly: they can't provide baseload coverage.
Wind and solar are nice ideas, but if you want to cover baseload they're just not up to it.
Please allow me to try to explain with an example. During the months of December and January, it is quite normal to experience several periods of no wind for up to a week in Denmark. During the same period there's 6 or 7 hours between sunrise and sunset.
Let's assume that a Danish citizen is average. Avg yearly electricity use is 1.6MWh, and sorry my sources will be mostly in Danish, https://www.bolius.dk/saa-meget-el-vand-og-varme-bruger-en-gennemsnitsfamilie-279. That gives us an avg daily usage of 4.4kWh. During december usage will be 30% above average, as per previous link. That gives us a daily avg usage of 5.7kWh in December.
During this period in 2022, solar accounted for 0.6% of the electricity produced in Denmark, https://www.verdensmaal.org/nyheder/danmark-blandt-eus-tre-solkonger. So at 0.3 kWh out of the 5.7kWh it's close to insignificant. But let's subtract that and now we're at 5.4kWh.
That's 5.4kWh we need to get from somewhere, the wind turbines are barely rotating. Where do we get it? Assuming a household of 4 people that's 22kWh daily. That's where we need powerplants. And personally I prefer nuclear to coal, gas and "carbon neutral" materials like straw and wood, for the CO2, as well as the particulate, emissions. The latter of which, is the cause of about 9mil deaths each year globally, https://www.ucl.ac.uk/news/2021/feb/fossil-fuel-air-pollution-responsible-1-5-deaths-worldwide.
What about battery storage? Presently there's one vendor of flow batteries in Denmark, https://www.visblue.com/, and while I can't post link to a price, I have been quoted 400-500000 DKK, 50-67000€, for a 10kWh solution, by the company that services my wind turbine.
That's 50k€ for half a day's worth of electricity storage. Let's go back to the example of no wind for a week, you'd need to spend 700k€ for each household at that price. And no, we don't need to have each house have storage installed, and yes, the price will probably be considerably less with different vendors and larger solutions. But it doesn't change the fact that you need to store at least 7x5.4kWh per Dane in order to not need to get electricity elsewhere.
Larger grids have been argued. I don't have the stamina to go into detail on that. Suffice it to say, that describing the investment needed, to make that somewhat viable, as astronomical would be playing it down.