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A near 100% renewables grid is well within reach, and with little storage

reneweconomy.com.au

341–350 of 365 posts

Re: A near 100% renewables grid is well within reach, and with little storage

#341
post #228

Earlier quoted context omitted.

With the energy industry making record profits [1], my naive self has extreme trouble believing that's the whole story. https://energycommerce.house.gov/newsroom/press-releases/pal...

Why do you think that people who sell a commodity that has increased demand wouldn't make more money? There's no need for a conspiracy. The people who make money from the gas extracted and exported from Australia will profit at the expense of the average Australian who pays more for the gas extracted from under their own soil. You could vote to have them distribute the windfall profits to the people, if they didn't h…

Australia tried that whole voting for the profits to be distributed thing.

The CIA gave them a new government that wouldn't be so silly as to enact public will.

Then murdoch came along to make sure noone would vote based on reality anymore.

Re: A near 100% renewables grid is well within reach, and with little storage

#342

Earlier quoted context omitted.

So solar farms don't sell to the grid at midnight. You really don't know how any of this works, do you?

I guess we can just shut off unimportant things like refrigeration and life support at night.

No, you buy expensive electricity at night and cheap solar during the day. You were about to explain to me how buying the expensive electricity all the time worked out cheaper than that. Have you thought it out yet?

Re: A near 100% renewables grid is well within reach, and with little storage

#343

Earlier quoted context omitted.

New York just approved $5 billion to import Canadian Hydro. This is already done on various smaller scales in the US and across the globe. People in Norway are being riled up by their right wing parties because they are selling hydro electricity (and gas) at a high profit to the rest of Europe via connections because of the Russian situation, and there's nothing the right-wing hates more than market-based price signa…

There is no need for that "right-wing" snub there, the same is happening here in Sweden where power prices in the middle and south have been going through the roof even though power generation costs have mostly [1] been unchanged due to the majority of power generation coming from hydroelectric plants (the north) and nuclear plants (the south). Prices have shot up in the south of Sweden because that part of the count…

You forgot to explain why price signals were bad and 'artificial'?

I know nothing about Sweden, but:

> https://www.thelocal.se/20220824/explained-whos-telling-the-...

> “I think it’s simply political,” Nilsson says. “The conservative parties are hoping to gain votes by bringing up the nuclear issue. I don’t think they seriously think that we will build new nuclear in Sweden. Everyone knows that it’s terribly expensive and takes a very long time.”

> Söder agrees: “The right-wing parties (Sweden Democrats, Moderates, Christian Democrats and Liberals) have nuclear power as a common interest where they can show unity. There are also several communities where wind power resistance has become significant, and by stating ‘we think it was stupid to shut down Ringhals’, they can attract voters – even if this will not in any way solve the long-term challenges in Sweden, which is to build a lot of new power production as cheaply as possible.”

> It’s also worth noting that the Energiforsk report estimated that power prices would have been 35–50 percent lower if Sweden had opened an additional large, offshore windfarm off the coast of southern Sweden.

So it appears there was need for my "right-wing" comment after all. I must be psychic.

Re: A near 100% renewables grid is well within reach, and with little storage

#344

Earlier quoted context omitted.

It seems that it can be easily adjustable by include grid capacity for pricing calculation.

It can, but that would lead to wasted energy when demand is pushed below supply (when there is no way to store the supply). That sort of defeats the benefit of elasticity in the demand that was the premise. The idea was that when there is a lot of power being generated on a sunny and windy day, everyone should charge all batteries, heat their water a few extra degrees, run heating or air conditioning a bit harder, et…

One interesting approach to this is special tariffs that give you discounts when your local wind turbine is producing.

https://octopus.energy/octopus-fan-club/

Re: A near 100% renewables grid is well within reach, and with little storage

#345

Earlier quoted context omitted.

This report provides costs for nuclear power down to about $30/MWH (LCOE) at 3% discount rate (interest rate - inflation rate): https://www.oecd-nea.org/upload/docs/application/pdf/2020-12... Most countries should be able to reach such levels if providing guarantees for the credit, removing overly excessive regulation and allowing the most capable and experienced construction companies to lead construction and initia…

There are a couple of problems with that analysis. Firstly I am very sceptical of their 60 year claim with an additional 20 years for LTO. Every time I look a supposed 60 year reactor in the west up it is having major problems after less than 40 -- I'd be interested in seeing a survey of reactors broken down by location (china is provably much more cost efficient at doing large projects than anyone else albeit at a h…

> (china is provably much more cost efficient at doing large projects than anyone else albeit at a high human cost)

Tesla and SpaceX is proving that with the right leadership, western countries can also do large projects. Anyway, I think we should let international corporations compete for such projects, kind of like ship construction or more remotely, the car industry.

> Ending the day with half of that production in a battery nets you an LCOE around $50 and that is falling by 15%/year with little indication of slowing down.

That is great, and I'm a huge believer in solar for many purposes in suitable climates. Where I live, though, we have about 4-6 hours of faint daylight in the middle of winter, when it's really cold.

Also, unlike nuclear, no country has so far been able to demonstrate an electrical grid that is powered exclusively by renewables (and Europe has tried). So far, everyone who tried, ended up with a huge reliance on (mostly Russian) natural gas, while having prices quite a bit above $50/MWH LCOE (for the grid as a hole). Currently, consumer facing prices are above $500/MWH, and may reach $1000/MWH this winter.

If some country wants to invest in a plan to make them independent of natural gas without nuclear, I wish them the best of luck, but in my opinion, nuclear is the proven path. Also, it's not like one cannot do both at the same time.

> Wind is a similar story (although not dropping as precipitously) and moderately anti-correlated.

Wind also has longer variance in supply. To some extent, making a grid the size of Australia may lower the variance, but at the cost of a grid that competes with nuclear in zero day investment costs while bringing its own set of political risks (especially in places where the grid needs to span many countries with different cultures).

> spend it on a new system that is $3/MWh

With all due respect, this is a fantasy number. When you're not including the storage and/or distribution needed to provide stable supply, this number means nothing. (Or rather, it's only relevant as long as only a small fraction of the power comes from such a source.)

Actual costs (LCOE, including enough enough storage to provide stable supply) are much higher. Different estimates exist. Your $50/MWh is probably the lowest I've seen. Typically I see $100-$200/MWH when including moderate storage, and several times that (up to $1000/MWH) when including enough storage to last several days with very little wind.

From my point of view, paying $30-$50/MWH for stable electricity production, with the lowest carbon emissions (construction emissions for concrete, etc, are about the same as the best renewables), low dependence on minerals that are in short supply (rare earths, etc) using proven technology is quite fair.

Hopefully, renewables, thorium, fusion etc will continue to develop to a point where they become clearly superior to nuclear in terms of price. But if so, I see that as a potential upside. Building more nuclear provides a hedge against the risk that this will take a long time.

> And then there's all the geopolitical problems going nuclear entails for the large portion of the world who aren't allowed to make their own fuel.

It's not for every country, but unlike natural gas, there are enough deposits in stable democratic western countries to power all such countries.

Also, there are alternatives sources for China and Russia to not worry too much about the risk either. India, being somewhat in-between these worlds would probably be able to source fuel from at least one.

And unlike natural gas, transporting nuclear fuel is quite trivial, due to the energy density.

Finally, it's not like we need to have 100% of one source of energy. Some should probably go mostly renewable (Australia, for example), due to climate. Some already have plenty of hydro, and some would benefit from having more (or much more) nuclear.

Some might also need to go for fossil fuels, at least as backup. I'm thinking of smaller islands, for instance (like Hawaii). But it would be good if we could soon start to REDUCE the dependence on fossil fuels, instead of consuming more and more every year, globally.

Re: A near 100% renewables grid is well within reach, and with little storage

#346

Earlier quoted context omitted.

There is no need for that "right-wing" snub there, the same is happening here in Sweden where power prices in the middle and south have been going through the roof even though power generation costs have mostly [1] been unchanged due to the majority of power generation coming from hydroelectric plants (the north) and nuclear plants (the south). Prices have shot up in the south of Sweden because that part of the count…

You forgot to explain why price signals were bad and 'artificial'? I know nothing about Sweden, but: > https://www.thelocal.se/20220824/explained-whos-telling-the-... > “I think it’s simply political,” Nilsson says. “The conservative parties are hoping to gain votes by bringing up the nuclear issue. I don’t think they seriously think that we will build new nuclear in Sweden. Everyone knows that it’s terribly expensiv…

A "price signal" is artificial when the market is manipulated to set the price artificially as is done in Sweden where electricity prices in the south are tied to the European market while those in the north are not. This leads to extreme differences in price based exclusively on where you happen to live. In some cases people will pay 20-30 times more for the same electricity than their neighbours who happen to just live on the other side of the region. Should I call this type of manipulation "left-wing" to counter your "right-wing" accusations? State-controlled markets are after all a "left-wing" phenomenon. But no, I won´t since I deem this type of polarised discussion counterproductive. On the subject of building nuclear power plants it is clear to everyone and his dog that the reason why building new plants is expensive and takes a long time lies in the policies put in place by the same people who claim that building nuclear power plants is too expensive and takes too much time. The "wind farm" argument is just as hollow since it is not the lack of "wind farms" which has driven up the price of electricity but the fact that those same people closed down 6 fully operational nuclear plants, thereby creating an electricity shortage in the south of the country which has led to an enormous increase in the use of fossil fuel-powered plants - the same plants they accuse of causing "climate change". Top load plants which used to only be needed in extreme circumstances - severe cold snaps in the middle of winter - are now needed on a regular basis to keep the net frequency from sagging below 48.5 Hz.

Re: A near 100% renewables grid is well within reach, and with little storage

#347

Earlier quoted context omitted.

You forgot to explain why price signals were bad and 'artificial'? I know nothing about Sweden, but: > https://www.thelocal.se/20220824/explained-whos-telling-the-... > “I think it’s simply political,” Nilsson says. “The conservative parties are hoping to gain votes by bringing up the nuclear issue. I don’t think they seriously think that we will build new nuclear in Sweden. Everyone knows that it’s terribly expensiv…

A "price signal" is artificial when the market is manipulated to set the price artificially as is done in Sweden where electricity prices in the south are tied to the European market while those in the north are not. This leads to extreme differences in price based exclusively on where you happen to live. In some cases people will pay 20-30 times more for the same electricity than their neighbours who happen to just…

That's not artificial.

There are literal physical reasons why the prices in different markets are different. The transmission capacity is the limiting factor.

Why do you think those are left-wing and artificial?

Wind has been the cheapest source of energy in Europe for over a decade, yet the Swedish right-wing are against it.

As long as the power plant has decent pollution controls and the carbon is taxed I don't really have an issue with it. That provides a clear price signal to build more cheap renewables, like wind. Unless you are against that, like the Swedish right-wing parties. Which doesn't really give me any confidence that they're doing the smart things to solve this 'problem' they've caused. And the local Swedish energy experts seem to agree with me.

Re: A near 100% renewables grid is well within reach, and with little storage

#348

Earlier quoted context omitted.

I guess we can just shut off unimportant things like refrigeration and life support at night.

No, you buy expensive electricity at night and cheap solar during the day. You were about to explain to me how buying the expensive electricity all the time worked out cheaper than that. Have you thought it out yet?

Where do you store the electricity? The world's largest battery can run the grid it's attached to for about 10 minutes.

Re: A near 100% renewables grid is well within reach, and with little storage

#349

Earlier quoted context omitted.

There are a couple of problems with that analysis. Firstly I am very sceptical of their 60 year claim with an additional 20 years for LTO. Every time I look a supposed 60 year reactor in the west up it is having major problems after less than 40 -- I'd be interested in seeing a survey of reactors broken down by location (china is provably much more cost efficient at doing large projects than anyone else albeit at a h…

> (china is provably much more cost efficient at doing large projects than anyone else albeit at a high human cost) Tesla and SpaceX is proving that with the right leadership, western countries can also do large projects. Anyway, I think we should let international corporations compete for such projects, kind of like ship construction or more remotely, the car industry. > Ending the day with half of that production i…

You appear to agree that solar and wind and batteries are the best options for most of the world even if your optimistic nuclear price point is reached.

So it's not clear what you are arguing against? Isn't that the best way to reduce dependence on fossil fuels which are a global commodity?

Re: A near 100% renewables grid is well within reach, and with little storage

#350
post #283
post #129

Earlier quoted context omitted.

That was literally everybody's plan. The alternative was to continue using coal while ramping up renewables. For all the handwringing about the turned off nuclear plants they were getting old in the tooth and wouldnt have made a substantive difference to the current crisis. New plants would take 3x as long and cost 3x as much. France is in just as much shit as germany this winter coz their nuke plants are aging out.…

Or build LNG import terminals.

Good luck doing that in the next 3 months.
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