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Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bryanlarsen on Wednesday December 29, 2021 @09:19AM (#29724978)
Renewables and electrification are the primary solution to the climate change problem.

This book contains a very practical roadmap on how we can do this quickly, cheaply and practically: https://mitpress.mit.edu/books/electrify

In this thread from yesterday I answer most of the standard objections: https://news.ycombinator.com/item?id=29721417

P.S. The people agreeing with me mostly got upvoted and the people disagreeing mostly got downvoted, so read from the bottom if you want to see answers to objections.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Eric_WVGG on Wednesday December 29, 2021 @10:00AM (#29725351)
Alright, I’ve got one that I don't see on your list, it’s been on my mind for years. What about the goldfish problem?

Goldfish grow to fit their containers. Keep a little 1-inch goldfish in a bowl, it’ll stay that size. Toss it in a koi pond and in no time you’ll have something approaching the size of a housecat.

People are like this. A family might be scratching by on $40k/year. Dad gets some windfall or promotion and is making $60k/year. So did he finish out the year in the same house with $20k in the bank? Of course not, he’s paying for all the clothes and goods that he couldn’t afford before.

Ten years later he’s gotten promoted to making $120k/year. Now is there money in the bank, or are they living in a bigger house and driving a nicer car?

This is what worries me about any climate plan that is only based on clean energy. If driving, for example, gets cleaner, do we use 50% less petroleum, or keep burning the same amount of petroleum on different projects? (And what about all the non-tracked pollution caused by tire wear?)

This problem is even more stark when people talk about atmospheric carbon capture. If we're emitting X tons of carbon per year, and recapture Y tons, will we continue to emit X, or start emitting X + Y?

None of this is reason not to pursue renewables and electrification, but I think it’s inescapable that any "primary solution" has to be a reduction in consumption.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by oezi on Wednesday December 29, 2021 @10:08AM (#29725425)
This is all fine as long as all externalities are included in the price of consumption. Currently burning fossils is just way too cheap for the damage it does.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pyrale on Wednesday December 29, 2021 @11:52AM (#29726622)
> This is all fine as long as all externalities are included in the price of consumption.

Just like a software team scaling a product is going to discover new scale issues, we discover new externalities on a regular basis.

Hoping that we can discover all externalities ahead of time and price them is an impossible objective.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by jl6 on Wednesday December 29, 2021 @10:14AM (#29725489)
It’s a great question, but if resources are genuinely clean, ethical and renewable, is it a problem to consume them? Perhaps the question is how to determine whether the things we consume genuinely are clean, ethical and renewable or not.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by nicoburns on Wednesday December 29, 2021 @11:39AM (#29726459)
The issue is that nothing is really cost free. Windfarms are better for the environment than alternatives, but they still have a significant impact. And that will increase if the best (low impact) sites get used up, and we still need to find space for more.

I think reduction in consumption has to be part of the solution too.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @10:04AM (#29725384)
Big +1 on that one.

France goal to meet Paris agreement is actually to reduce by ~5% per year ALL energy consumption. -5% is roughly what we had with 3 lockdowns in 2020. So it's basically a COVID added to a COVID each year, for 30 years.

That's no matter what you do in your actual energy deployment and investment.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by zardo on Wednesday December 29, 2021 @02:19PM (#29728805)
> Keep a little 1-inch goldfish in a bowl, it’ll stay that size.

In much the same way that keeping a puppy in a tiny kennel full of it's own filth will stunt it's growth.

https://www.tfhmagazine.com/articles/freshwater/goldfish-myt...

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pjc50 on Wednesday December 29, 2021 @10:13AM (#29725483)
In the context of energy, this is known as the "Jevons paradox": https://en.wikipedia.org/wiki/Jevons_paradox
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @09:29AM (#29725076)
https://app.electricitymap.org/zone/DE

Germany: 2x the French nuclear capacity in wind and solar + coal and gas (edited): 398gCO₂eq/kWh

France: nuclear + a bit of hydro and renewables: 46gCO₂eq/kWh

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by teekert on Wednesday December 29, 2021 @09:47AM (#29725250)
Germany should have kept their nuclear power plants just a bit longer, just to get through the transition. Closing them all as fast as they did is just difficult to defend.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @09:49AM (#29725268)
Tell that to Belgium. They are planning to close down all their nuclear plants right now. And replace them with gas.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by teekert on Wednesday December 29, 2021 @09:56AM (#29725322)
Those LNG lobbyist from the US (or should I say neo economic-hitmen) are really worth their money. Would be shame if it backfired and the EU turned to Russia. Gas prices are through the roof, I really hope our politicians are going to think "EU first" for a change.

* Keep the nuclear plants open until we transition fully to renewables. In the meantime:

* Get LNG from the US or natural gas from the Russians depending on market prices. (Ignore those threats/boycots from the US wrt Nord Stream 2 gas pipeline, show some cojones)

How hard could it be?

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pyrale on Wednesday December 29, 2021 @11:09AM (#29726081)
> Those LNG lobbyist from the US (or should I say neo economic-hitmen) are really worth their money.

They aren't the main cause here. Environmental parties in Europe have historically been built from anti-nuclear groups, and their involvement against commercial nuclear energy is ancient.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by AlexanderDhoore on Wednesday December 29, 2021 @11:21AM (#29726221)
This is the sad truth. The green party in Flanders/Belgium is pushing hard to close our last nuclear plants. How they can rationalize replacing them with Gas is beyond me. They are running solely on ideology at this point.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by cinntaile on Wednesday December 29, 2021 @01:21PM (#29727840)
The rationale is that this is a temporary measure, cheaper than building new nuclear plants, while the renewable buildout continues. It's likely true, but I doubt it's cheaper than running the current nuclear powerplants for longer than originally intended. I haven't looked at the numbers and the assumptions so I could be wrong in my assumption.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @10:17AM (#29725521)
There is no such things as "100% renewable". The only countries that can do that already have and is because they have a lot of hydro-power or other controllable way of producing energy without emitting CO2 (Iceland, Finland...).

If you don't have way to produce in a stable matter, NOW (not in 20 years when we might have the tech to store a crazy amount of electricity across the months) your electricity you have to import it or burn what you have in your country. France choose to import uranium.

Or we go 100% renewable, but we need to start discussing about a society where electricity is not 24/7 available for a major part of the population.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bjourne on Wednesday December 29, 2021 @11:02AM (#29725998)
Finland doesn't have a lot of hydro power. Most of its power comes from imports, nuclear and thermal power. Your claim that 100% renewable cannot guarantee electricity 24/7 to everyone is contradicted by countless reports.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by trenchgun on Wednesday December 29, 2021 @02:31PM (#29728979)
We do have quite a bunch of hydro, actually.

Electricity consumed by source 2020: Nuclear 28% Electricity by combined heat & power production from central heating & industry and other thermal 25% (about 50% split bioenergy vs fossils) Hydro 19% Import 18% Wind 10%

Altogether electricity production is 52% from renewables.

Source: https://www.stat.fi/til/salatuo/2020/salatuo_2020_2021-11-02... And: https://www.motiva.fi/ratkaisut/energiankaytto_suomessa/sahk...

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @11:14AM (#29726149)
I'd be curious to see those reports :)
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bjourne on Wednesday December 29, 2021 @11:20AM (#29726208)
"Despite some debate, most experts agreed that 100 percent renewable energy was feasible. Is it economically or politically feasible - that's a very different question." https://www.sciencealert.com/these-climate-experts-say-100-r... Also see the links posted by bryanlarsen.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @11:55AM (#29726656)
> "The Earth receives 23000 TW of solar energy, while the global energy consumption is 16 TW. Therefore, [100 percent renewable energy] could be possible even if we capture only 0.07 percent of the solar energy" says Professor Xiao Yu Wu, an energy expert from MIT.

Sure, doesn't solve the night issue. Having energy is something, having a stable production from a very diffuse and non stable one (day/night) is something else.

> Iceland power near 100 percent of its electricity from renewable energy, using their abundant geothermal and hydro supplies. Renewable energy can also dominate electricity needs for more populous countries too.

So geothermal and hydro.

> About 80 percent of Brazil's electricity needs for its 209million people come from renewable sources, biomass and hydro mostly. On average, however, renewables power ~29 percent of electricity around the world. So can renewables reach 100 percent for populous countries?

So biomass and hydro.

> He argues that *there is a heavy reliance on hydro and biomass sources* - while most countries don't have access to these, so would be reliant on sources like solar, wind, and storage. In those circumstances, it's highly unlikely for renewables to power 100 percent of the electricity supply he says.

Well thanks, the article itself is making the point I want to make.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bjourne on Wednesday December 29, 2021 @12:06PM (#29726803)
The article claims that "most experts agreed that 100 percent renewable energy was feasible", yet you decide to quote one of the contrarian experts. Why? In either case, I have satisfied your curiosity; the article links to a number of reports claiming that 100% renewable electricity is possible.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pfdietz on Wednesday December 29, 2021 @03:37PM (#29729686)
The Earth actually received 100,000 TW of solar energy. The 23,000 must be that fraction that hits land?
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by jnurmine on Wednesday December 29, 2021 @05:40PM (#29731072)
According to BBC: "The country will not turn its back on nuclear technology completely as part of the compromise deal, with 100 million euros ($113m; £84m) to be invested into research including on smaller, modular nuclear energy plants."
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by c0balt on Wednesday December 29, 2021 @09:45AM (#29725237)
The thing is that coal+gas ist still a massive driver for German electricity generation. Goal is to get coal off the grid until 2035 but has to be seen how they actually handle this has to be seen.

The nuclear part in both countries also face the problem of long term storage that isn't solved by either one of the countries.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @10:03AM (#29725377)
First that’s an instantaneous number not any sort of long term average.

More importantly “Capacity” isn’t a useful metric for comparison when nuclear costs are an order of magnitude higher for capacity. Even with a 2x increased capacity factor nuclear is still several times more expensive per kWh. So in terms of actual investment in carbon neutral sources France has spent roughly 4x as much as Germany to get that reduction. It’s an admirable sacrifice by the French people, but the ROI in terms of money spent vs CO2 reduction is quite poor.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @10:09AM (#29725433)
This has been debunked and proven in various papers and scenarios. The latest one in France is by RTE (our national grid management company). https://www.connaissancedesenergies.org/les-futurs-energetiq...

They made 6 scenarios, from "100% renewable" (M0) to "50% nuclear-50% renewable in 2060" (N03). And here is there result cost wise: https://www.connaissancedesenergies.org/sites/default/files/...

N03 means we actually restart building nuclear plants and maintain the existing ones longer than expected. And yes there is 50% of renewable, because France didn't do anything for 20 years and it's "too late" to replace and extend the existing ones.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @10:18AM (#29725527)
The wholesale price seen be RTE is post subsides. From their perspective nuclear is awesome, it’s also awesome for French consumers or would be if they didn’t have to pay taxes.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by littlestymaar on Wednesday December 29, 2021 @10:50AM (#29725862)
Mandatory myth busting here: there is no subsidies on French nuclear which in facts yields billions in profit ever year to the French government, but a tons of subsidies on its competitors (and below-the-market-price access to nuclear electricity for them so they can “freely compete” with EDF. For those interested see ARENH).

There are compelling arguments against nuclear in France (namely the aging of the existing reactors and the industrial inability to ship new reactors because we've lost most of the learning curve after several decades without significant reactor construction) but imaginary subsidies ain't one.

I know Retric won't change their mind, but I hope other readers won't buy their bullshit.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @10:57AM (#29725937)
> no subsidies on French nuclear

The most obvious French subsidy for nuclear is who pays for possible 500+ billion Euro nuclear accident. The Paris Convention and the Brussels Convention both require insurance for nuclear accidents, but cap liability to operators with the difference being made up by taxpayers.

That’s an easy to verify subsidy, as was the recent bailout for Areva S.A., I could go on but subsidies get convoluted. Pressure from the French government for people to use electric heating, well it’s in support of the nuclear industry but not really a “subsidy” or is it? Let’s say no.

What about low interest government loans? Sure that’s an obvious subsidy.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by littlestymaar on Wednesday December 29, 2021 @11:23AM (#29726243)
> The most obvious French subsidy for nuclear is who pays for possible 500+ billion Euro nuclear accident. The Paris Convention and the Brussels Convention both require insurance for nuclear accidents, but cap liability to operators with the difference being made up by taxpayers.

That's stretching the meaning of the word “subsidy” quite a lot…

> That’s an easy to verify subsidy, as was the recent bailout for Areva S.A.

Oh please tell us more it's gonna be funny because you obviously don't know what you're talking about.

> Pressure from the French government for people to use electric heating, well it’s in support of the nuclear industry but not really a “subsidy” or is it?

Oh you mean the type of heating that's been FORBIDDEN in new building for a decade? Please be serious…

> What about low interest government loans? Sure that’s an obvious subsidy.

Yes, too bad it doesn't exist. (In France, UK has some kind of state-guaranteed loan for Hinkley point, but that's not the right country and not “low interest loan” either).

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @12:20PM (#29727003)
The heating thing seems like an odd bit of trivia today, but back in 1988 French nuclear reactors had a capacity factor around 60% and home electric heating such as heat pumps was considering one way of boosting consumption especially at night. Things have clearly changed over time, but I am unaware of any current regulations banning new homes with electric heating.

> obviously don't know what you're talking about.

Please enlighten us: European Union antitrust regulators approved the French government's plan to inject 4.5 billion euros ($4.8 billion) into embattled nuclear group Areva AREVA.PA, saying the rescue would not unduly distort competition. www.reuters.com/article/us-areva-restructuring-eu-idUSKBN14U1L0

PS: Hinkly is somewhat interesting as the French government has a major stake in the UK power plant. Digging into the financing gets rather interesting.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by littlestymaar on Wednesday December 29, 2021 @03:19PM (#29729496)
> The heating thing seems like an odd bit of trivia today, but back in 1988 French nuclear reactors had a capacity factor around 60% and home electric heating such as heat pumps(sic[1]) was considering one way of boosting consumption especially at night.

So, by your logic we were building new plants for no apparent reasons in the 80-90s, and to make it useful we decided to force people to use electric heaters to boost consumption. You couldn't imagine that there were no conspiracy to build nuclear plants for the sake of it and the logic actually went the other way around? After the oil shocks the French government decided to become more energetically independent. At this time most of the heating was provided via fuel oil boilers, so it was highly dependent on the international price of oil. So the government decided to encourage people to use electric heaters instead, and then built nuclear plants to provide the needed electricity. (the reader will note that this is a clear example of Brandolini's law, where the amount of effort needed to refute bullshit is significantly higher than to produce it).

> Things have clearly changed over time, but I am unaware of any current regulations banning new homes with electric heating.

So maybe you shouldn't talk about a country you don't know? “Réglementation Thermique 2012” (more commonly called “RT 2012”) is what you're looking for. And it was the biggest and most disruptive construction law ever, and was discussed in depth for years. Anyone with a least a minimal awareness on the French energy issues will inevitably be aware of it.

> Please enlighten us: European Union antitrust regulators approved the French government's plan to inject 4.5 billion euros ($4.8 billion) into embattled nuclear group Areva AREVA.PA, saying the rescue would not unduly distort competition. www.reuters.com/article/us-areva-restructuring-eu-idUSKBN14U1L0

Thanks, this cherry picking from the first Google result you could find illustrate my point about you not knowing the topic. Do you know the difference between a shareholder restructuring an asset and a state bailing out a private company? In the first case, the shareholder is actually rewarded the capital investment through its return on equity. Since Areva's restructuring, the French government has already been paid back through EDF's dividends. (of course these dividends aren't directly the result of the said restructuring, which is still bearing fruits, but simply the result of the recurring revenue that EDF brings to the French government ever year).

[1]: it was not heat pumps (which would be terrible for the job of artificially increasing consumption anyway because of their high yield) but plain convector, which where much affordable.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @04:53PM (#29730558)
Réglementation Thermique 2012

It’s a little more complicated. RE 2012 arguably does favor gas, but it does not requires it. However RE 2020 as of 2 days from now changes things back to electricity and for homes under construction is what’s actually in effect.

Sorry, if you’re using outdated information but the industry has moved on.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by littlestymaar on Wednesday December 29, 2021 @06:44PM (#29731616)
Yes, RE2020 changes the calculation coefficients but no it doesn't allow electric convectors back in new buildings. And worse: it doesn't change the fact that between 2012 and today, electricity (and then nuclear) was actively discouraged by French laws, which defeat your argument about the government promoting it actively to help nuclear industry.

But interestingly enough, two comment above you were “unaware of any current regulations banning new homes with electric heating.”and now you've suddenly become an expert on the topic of French construction law… I like debating with people with opposing views, but discussing with people who are compulsive liars isn't my cup of tea. Good day.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by Retric on Wednesday December 29, 2021 @10:59PM (#29733439)
I didn’t flip flop on anything my comments are quite consistent here.

> it doesn't allow electric convectors back in new buildings.

What part do you think bans electric heating? It’s simply not there in RE2012 or RE2020, hell people are actively talking about how RE2020 is switching to electricity from gas in new construction. I can’t prove a negative here, if you think something is banned you’re going to have to show where it’s banned.

The wider context is France is primarily on electric heating be that ultra efficient ground source heat pumps or more traditional regular heat pumps. So yes they changed the regulations recently RE2012 after achieving the desired effect and are now changing them again in RE2020.

PS: This comes back to a winder context the legacy of past subsidies don’t go away. When someone builds a wind farm or nuclear reactor with government backing even just for R&D costs and thus ends up with lower payments those lower payments stick around. Just as someone being given a house avoids mortgage payments for the next 30 years.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pydry on Wednesday December 29, 2021 @12:12PM (#29726882)
Since when does free insurance stretch the definition of subsidy?

Clean up costs in Fukushima will total about $1 trillion.

Probability of a core melt accident in 1 year or reactor operation is apparently 1 in 3704.

Insuring for that much with zero profit margin would be $269 million per year per plant.

That's about 1.5x-2x the cost of operating a nuclear plant.

It's a lot of money to handwave away.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @10:20AM (#29725567)
RTE is pushing a lot for renewable to be deployed as well as more nuclear. More renewable means more grid deployment, so more work for them. Don't shoot the messenger.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gostsamo on Wednesday December 29, 2021 @09:46AM (#29725246)
Where do you count the coal?
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @09:53AM (#29725293)
Sorry, I didn't put it in the example. You have all the numbers in real-time on the link.

My point was more to show that even you have a huge quantity of renewable, that doesn't means that is the correct path to go CO2 wise. Except if you accept that your society adapt itself to a non planned and highly variable electricity production.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gostsamo on Wednesday December 29, 2021 @10:18AM (#29725537)
Partial data is equal to false data when you misrepresent it like that. I'm also pro nuclear power, but coal and gas are too big factor to ignore.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by edhelas on Wednesday December 29, 2021 @10:22AM (#29725580)
Just edited it ;)
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by trebligdivad on Wednesday December 29, 2021 @11:23AM (#29726247)
The UK is doing pretty well today - 39%/13GW Wind energy at the moment which is great; but we have whole months when we'll have near to nothing when there is very little wind (e.g. less than 2GW for a long time), when that happens in the winter when we've not got much Solar, I'm not seeing how Renewables keep us going - maybe if some of the tidal systems get working. Energy storage works great for daily peak/troughs - but not for weeks. So, at the moment I'm assuming we're going to need more nukes to get rid of gas. Roll on Fusion.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by aembleton on Wednesday December 29, 2021 @11:52AM (#29726617)
It is one of the reasons for the new undersea cable to Norway. When we have excess wind then we can pump water up a mountain there, and when we don't the we can release it and recapture some of that energy.

Problem is, that is currently only 1.4GW of capacity. We'll need a whole lot more of it to get fully off gas or nuclear.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by xxgreg on Wednesday December 29, 2021 @06:11PM (#29731351)
Thanks for taking the time to write these comments.

In my opinion, existing tech is able to solve the climate crisis. Breakthroughs can make the solution cheaper and sooner.

In my view the main problem is the attitude of doom amongst the general population. If people felt there was a solution, and were excited and energised by the challenge, they'd be more willing to support political changes. I.e. pushing back against entrenched obstructionist industries, pricing externalities, and investing in infrastructure.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by chr1 on Wednesday December 29, 2021 @10:07AM (#29725413)
What do you think about ocean thermal energy conversion plants [1]. It seems to be a promissing technology that both produces energy during whole day, and captures carbon by increasing the biomass of the ocean.

[1] https://en.m.wikipedia.org/wiki/Ocean_thermal_energy_convers...

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gwright on Wednesday December 29, 2021 @09:26AM (#29725047)
> Renewables and electrification are the primary solution to the climate change problem

Not until grid-scale energy storage is widely available and affordable.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by hannob on Wednesday December 29, 2021 @02:18PM (#29728798)
This is really thinking it backwards. You don't build the storage before you have the renewables to store. And almost no country is at a point where they need storage in large amounts (as long as that's an option it's cheaper to add flexibility by exchanging with neighboring countries).

E.g. hydrogen electrolyseurs + gas plants that can use H2 exist and aren't particularly challenging. The reason you don't see that yet is that we don't have the huge amounts of renewables that would need this infrastructure yet.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by PaulDavisThe1st on Wednesday December 29, 2021 @10:04AM (#29725381)
One might reasonably consider "grid-scale energy storage" to be an implicit part of "renewables and electrification".
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gwright on Wednesday December 29, 2021 @11:14AM (#29726142)
I don't think that is reasonable as an interpretation because grid-scale energy storage doesn't yet exist.

An assertion that "renewables and electrification" solves our energy problems is just circular reasoning. It requires a non-existent technology (grid-scale long-term energy storage) and so doesn't fall into the category of "solution" and more into the category of "speculation".

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pydry on Wednesday December 29, 2021 @12:03PM (#29726754)
What exactly are these 2.2GW of battery installations in California then?

https://www.energystoragejournal.com/southern-california-edi...

Or the 1GW they already have?

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by stymaar on Thursday December 30, 2021 @03:53AM (#29734962)
The power (in W) isn't the relevant value when talking about batteries, it's the stored energy (in Wh) that matters (it's the opposite for dam storage, where energy is plentiful but power is limited). Just do the math and check how many minutes the installation would stay up under significant load from the grid.

BTW I'm baffled to see a website called “energy storage journal” mixing up energy and power like this …

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by iso1631 on Tuesday January 04, 2022 @04:41AM (#29793028)
> grid-scale energy storage doesn't yet exist

The New Zealand south island electric grid is almost entirely grid-scale energy storage, in the form of hydro. Easy to recharge (pump water uphill, although NZ doesn't need that), easy to tap (open gates).

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by cinntaile on Wednesday December 29, 2021 @11:28AM (#29726315)
What do you mean when you say grid-scale energy storage doesn't exist? Is this different from utility-scale which has existed for many years?
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by PaulDavisThe1st on Wednesday December 29, 2021 @01:26PM (#29727931)
We certainly do have grid-scale technology.

Whether it can be, or is, or will be deployed is another question.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bryanlarsen on Wednesday December 29, 2021 @10:29AM (#29725678)
Yup, that's in the book I linked.

A lot less storage is needed than most people think. We only need about 3 hours worth of storage. That's a lot, but it's feasible.

https://www.nature.com/articles/s41467-021-26355-z

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gwright on Wednesday December 29, 2021 @11:07AM (#29726059)
> We only need about 3 hours worth of storage

This doesn't align with the analysis that I've seen. For example in this post (https://www.manhattancontrarian.com/the-disastrous-economics...) the analysis shows that California would have to spend about $5 trillion on battery storage to have a solar+wind+battery grid.

If the book you reference was accurate we would be seeing headlines about power companies bragging about these new grid arrangements but instead I just see headlines about how India an China are moving ahead with enormous amounts of coal power plants, rapidly increasing energy costs where intermittent power generation is a significant fraction of power capacity (i.e. Germany), and power outages when base load generating capacity isn't sufficient to keep the lights on when the sun sets and the wind dies.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by cinntaile on Wednesday December 29, 2021 @11:24AM (#29726260)
> Due to seasonality of the availability of the wind and sun, most locations require a month or more of battery capacityto get a fully-wind/solar system through a year.

Yeah if their assumptions include a month or more then you can end up with an astronomically big sum. Also you don't need batteries for all your energy storage and they use todays battery prices to come up with that number.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by missedthecue on Wednesday December 29, 2021 @11:19AM (#29726200)
Is there even enough lithium on earth for global grid storage, nevermind electric vehicles?
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by thomasmg on Wednesday December 29, 2021 @03:43PM (#29729764)
Yes. Worst case, lithium can be extracted from seawater: https://electrek.co/2021/06/04/scientists-have-cost-effectiv... - but it's currently cheaper to get it from somewhere else. And lithium can be recycled. In the near future, I think most cars will use LFP batteries.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by RobertoG on Wednesday December 29, 2021 @12:31PM (#29727145)
There is a good chance that batteries for grid storage will be from different technologies than lithium.

For instance:

https://ambri.com/

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by fukpaywalls2 on Wednesday December 29, 2021 @11:44AM (#29726520)
stationary batteries do not need to be from lithium. please search for iron or rust batteries.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gwright on Wednesday December 29, 2021 @11:10AM (#29726093)
That article summary says:

> Yet even in systems which meet >90% of demand, hundreds of hours of unmet demand may occur annually.

and

> satisfy countries’ electricity demand in 72–91% of hours (83–94% by adding 12 h of storage).

So not 3 hours and still significant number of days without power.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by pfdietz on Wednesday December 29, 2021 @01:28PM (#29727960)
You back that up with combustion turbines burning some renewably-sourced fuel.

Capital cost of a simple cycle combustion turbine power plant: $500/kW Capital cost of a nuclear power plant: $10,000/kW

So, one can have this backup sitting there ready to go for just 5% of the cost of an all nuclear grid. You do need the fuel, but if it's only used a few hundred hours per year the fuel cost will be minor.

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by bryanlarsen on Wednesday December 29, 2021 @02:21PM (#29728829)
That's without overbuild. Look at the graphs at the back, the ones with 3x overbuild and 3 hours of storage. Small countries still have unmet demand, but Russia, US and Canada do not.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by ftth_finland on Wednesday December 29, 2021 @03:43PM (#29729758)
Oh, please. Up north, like here in Finland, you’d be hard pressed to get by with 3 months of storage.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by 7952 on Wednesday December 29, 2021 @05:22PM (#29730852)
The UK pipeline for battery storage is over 20GW.
Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by gwright on Monday January 03, 2022 @10:09AM (#29781471)
I don't think the units are correct here. My observation has been that even reputable news sources seem to go all wonky with energy units.

I believe the appropriate units for consideration would be GWh = gigawatt-hours.

This article, https://www.environmentalleader.com/2021/01/worlds-largest-u..., suggests that the largest battery storage system is 1,200 MWh or 1.2GWh of storage (at a cost of $400 million)

For comparison, all generation capacity in California is 272,576 gigawatt-hours https://www.energy.ca.gov/data-reports/energy-almanac/califo...

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by iso1631 on Tuesday January 04, 2022 @04:44AM (#29793052)
A grid battery has two numbers that are of interest

One is how many Joules it can deliver in a second (Giga/Mega/Kilo/watts)

One is how many Joules it can delivery completely (Giga/Mega/Kilo/watts) it can deliver

If I'm running my 10kW shower for 5 minutes, I can do that from a battery that only has 1kWh of storage, but I can't run it from a battery that can only deliver 1kW.

This is all high-school level science, and it's an indictment on the lack of diversity in news reporting how badly they get it wrong

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by jlarocco on Wednesday December 29, 2021 @12:20PM (#29727006)
I really have no idea if this is possible, but is there any possibility that with enough wind turbines, we might discover a down side to them?

Each wind turbine essentially transfers power out of the wind and into our electric grid, right? Is it possible we could build enough turbines for that to be a problem?

Re:The world’s biggest offshore wind farm, Hornsea 2, genera... by nootropicat on Wednesday December 29, 2021 @02:48PM (#29729157)
Yes, there are significant downsides: https://acp.copernicus.org/articles/10/2053/2010/acp-10-2053...

The short of it is that since wind exists because of temperature differentials, each wind farm increases them.

>Using wind turbines to meet 10% or more of global energy demand in 2100, could cause surface warming exceeding 1 °C over land installations