Lützerath: German Coal Mine Stand Off Amid Ukraine War Energy Crunch
The title of this post, is the same as that on this article on the BBC.
This is the sub-heading.
From her tiny wooden treehouse, which sways precariously in the winter wind, a young woman watches an enormous mechanical digger tear into the earth below, its jaws edging ever closer to the village which she’s determined to save.
And these two paragraphs outline the protest.
Lützerath, in western Germany, is on the verge – literally – of being swallowed up by the massive coal mine on its doorstep.
Around 200 climate change activists, who are now all that stand in the way of the diggers expanding the Garzweiler opencast mine, have been warned that if they don’t leave by Tuesday they’ll be forcibly evicted.
But this is not about coal or bituminous coal, as we know it in the UK, this mine will produce lignite or brown coal.
Read both Wikipedia entries linked to the previous sentence and you find some choice phrases.
For bituminous coal.
- Within the coal mining industry, this type of coal is known for releasing the largest amounts of firedamp, a dangerous mixture of gases that can cause underground explosions.
- Extraction of bituminous coal demands the highest safety procedures involving attentive gas monitoring, good ventilation and vigilant site management.
- The leading producer is China, with India and the United States a distant second and third.
For lignite.
- It has a carbon content around 25–35%. and is considered the lowest rank of coal due to its relatively low heat content.
- When removed from the ground, it contains a very high amount of moisture which partially explains its low carbon content.
- The combustion of lignite produces less heat for the amount of carbon dioxide and sulfur released than other ranks of coal. As a result, environmental advocates have characterized lignite as the most harmful coal to human health.
- Depending on the source, various toxic heavy metals, including naturally occurring radioactive materials may be present in lignite which are left over in the coal fly ash produced from its combustion, further increasing health risks.
- Lignite’s high moisture content and susceptibility to spontaneous combustion can cause problems in transportation and storage.
I don’t think, that we’ve ever burned lignite in the UK for electricity, as it is just too filthy.
This map shows the mine.
Note.
- The autobahn at the West of the map, is a six-land highway, so gives an idea of the scale.
- The village of Lützerath is towards the bottom of the map in the middle.
- What has been left after the mining, is going to take a lot of restoration.
It almost appears that some of the scenes of devastation, we are seeing in the Ukraine are also happening in Germany due to the frantic search for energy.
A 1960s-Educated Engineer’s Attitude To Coal
I was one of about four-hundred engineers in my year at Liverpool University in the 1960s.
- Quite a few of those engineers were from coal-mining areas and some were children of miners.
- I remember the graduate recruitment fair at the University in 1968, where the representative from the National Coal Board sat there alone, as if he’d got the 1960s version of Covid-19.
- Some went and talked to him, as they felt sorry for him.
- As far as I know, not one of us, went to work for the National Coal Board.
Engineers and other graduates of the 1960s, didn’t feel that coal was the future.
Had Aberfan and the other pit disasters of the era killed coal as a career, amongst my generation of the UK population?
What Should The Germans Do?
It is my view that whatever the Germans do, burning brown coal, should not be on the list. It’s just too polluting.
This article on euronews is entitled Germany And Poland Have A Dirty Big Secret – An Addiction To Brown Coal.
A few years ago, I was in Katowice on Poland and I have never seen such pollution in Europe, since the smogs of the 1950s.
The euronews article says this.
In eastern Germany some members of a little-known group claim they are being ethnically cleansed, not by militia groups, but by the coal mining industry.
Bulldozers have so far destroyed over 130 Sorb villages to make way for the mining of Europe’s dirtiest kind of fossil fuel – brown coal, or lignite as it is also known.
Brown coal mines are open cast and devour vast tracts of land. As well as whole villages farming and wildlife are destroyed.
The Penk family live in the village of Rohne. They feel their whole culture is also being destroyed.
Note that the Sorbs have a Wikipedia entry, which says there are 60,000 Sorbs in Germany.
One thing the Germans are doing is investing in the UK renewable energy industry.
- RWE own or part-own over 7 GW of offshore wind farms in the UK, some of which are under development.
- enBW and BP are developing 3 GW of offshore wind farms in the UK.
- Over twenty offshore wind farms use Siemens Gamesa turbines.
- The NeuConnect interconnector is being built between the Isle of Grain and Wilhelmshaven.
Would it not be better for the physical and mental health of German citizens, if they abandoned their dirty love of brown coal and spent the money in the North Sea?
Norwegian Companies To Explore Using Aluminium In Floating Offshore Wind Turbines
This is based on this press release from World Wide Wind, which is entitled WORLD WIDE WIND AS and HYDRO ASA Signs Letter Of Intent Aiming At Using Aluminium In Offshore Floating Wind Turbines.
This is the first paragraph.
Hydro, the world leading Norwegian aluminium and energy company and World Wide Wind AS, a Norwegian company developing a floating wind turbine, have signed a Letter of Intent (LoI) to explore the use of aluminium in the renewable wind industry. The two Norwegian companies are partnering up to develop floating wind turbines with a design specifically meant for offshore conditions. The goal is to use sustainable and recyclable materials in the construction, including aluminium.
In Do All Wind Turbines Have To Be Similar?, I said this about the radically different turbines of World Wide Wind.
I’ll let the images on the World Wide Wind web site do the talking.
But who would have thought, that contrarotating wind turbines, set at an angle in the sea would work?
This is so unusual, it might just work very well.
As aluminium is lighter, it might be a factor in the success of the design.
This is the last paragraph of the press release.
World Wide Wind’s integrated floating wind turbines are scalable up to 40MW – 2,5 times current wind turbines – and will use less materials and have a smaller CO2 footprint than conventional turbines. It is World Wide Wind’s ambition that these turbines will represent future design for floating wind turbine design.
40 MW is a very large turbine. This is definitely a case of handsome is as handsome does!
How Liquid Air Could Solve The UK’s Energy Conundrum
The title of this post, is the same as that of this article on The Telegraph.
The article is mainly an article that described the technology and it discloses a few facts.
- The Carrington plant should be delivered in 2024.
- Carrington will be a 30 MW/30 MWh system.
- Efficiency is around 50 %, but there are possibilities to raise it to 70 %.
- Australia is mentioned as a market.
- It is likely to be paired with supercapacitors or a flywheel to have a quick start.
- It seems to me, that turning an idea into a practical system is taking a lot of work and money, and a bit of a rethink.
But hopefully, the system will eventually be developed, as it does promise to be an energy storage system, that doesn’t make high demands on the environment in terms of expensive metals and rare earths.
Another Renewable Power Idea From Sweden
I have posted some ideas from Sweden on this blog including.
- H2 Green Steel – H2 Green Steel Plans 800 MW Hydrogen Plant In Sweden
- HYBRIT – Sweden’s Grand Plan To Make Zero-Carbon Steel
- Minesto – Is This The World’s Best Renewable Energy Video?
- TwinHub – Hexicon Wins UK’s First Ever CfD Auction For Floating Offshore Wind
And now there’s the SEATWIRL, which the company says is the future of offshore wind.
In the Areas Of Use, there is a section with a heading of SeaTwirl For Niche Markets, where this is said.
SeaTwirl has now identified markets where wind turbines of the size of 1 MW can meet a clear market demand and sees a possibility to build a business aimed at these niche markets in parallel with its main target. That can mean revenues for the company sooner than was originally planned.
The niche markets that have been identified are islands and remote seaside villages, fish farms and desalination plants. These are business and places that today are run mainly on electricity from diesel generators, which is both expensive and emits CO2.
One of the places I would use these turbines, is on the apex of four-beam steel portal frame buildings. The original concept for these buildings had been developed at Cambridge University during World War Two and one of the team, had set up a business in Warwickshire, constructing these buildings for barns, factory units and other purposes.
He had programmed a simple computer program, which he ran on a time-shared computer system. I was hired to improve the computer program.
What surprised me was the strength of these buildings and I believe they could support vertical turbines like SeaTwirl along the apex.
I feel there are many other applications, especially if they are designed to be part pf a bigger system.
Conclusion
I like the concept of SeaTwirl.
Is Something Happening At Highview Power?
It seems to be impossible to connect to the Highview Power web site.
I get the message, that my security is not private.
There is also no news of the company in the last month.
The Next Generation Of Fixed Foundation Wind Farms
This article on offshoreWIND.biz, is entitled Offshore Wind Turbines In 2022: 15 MW Prototypes Starting To Spin In Europe, Chinese Rolling Out 16 MW Models, Windcatcher And VAWTs Secure Demo Projects.
The title itself, shows 15-16 MW wind turbines and the text lists three European 15 MW and two Chinese 16 MW wind turbines, that are being developed.
This paragraph also indicates that Siemens Gamesa are in the running for orders.
So far, the SG 14-236 DD wind turbine has been selected as a preferred option for the Norfolk Vanguard and Boreas wind farms offshore the UK, as well as for the MFW Bałtyk II and MFW Bałtyk III wind farms in the Polish Baltic Sea.
Large turbines with a capacity of 15 MW and upwards appear to be becoming the new normal.
Water depths for these large turbines are forecast to be deeper than the two Norfolk wind-farms, which are between 22 and 40 metres.
This means that foundations will get much larger and heavier.
This article on offshoreWIND.biz, is entitled New Monopile Installation Method Attracts Major Backer, describes a new generation of monopiles as 100-130 metres in length, 12-15 metres in outer diameter, and a weight of up to 5,000 tonnes.
Installing these long and heavy objects safely in deep waters, is not a job for the faint-hearted.
The article describes a new method of installation, which I feel is very elegant.
- The XXXL monopiles are built horizontally.
- They are moved on to the jack-up ship by self-propelled modular transporters (SPMT).
- It appears at least two or possibly up to four monopiles can be carried on the ship.
- They are lifted into the vertical position by a lifting beam.
Note.
- No cranes are involved in the process.
- The lifting beam method of erecting the 5,000 tonne XXXL monopile is simple and very efficient.
- Self-propelled modular transporters were used to install the 2000 tonne subway at Hackney Wick station.
- Rollers are fitted on the ship to ease handling of the monopiles.
I can certainly see this specialised jack-up ship speeding up the installation of these giant monopiles.
Consequences For Floating Wind
I do wonder, if this method of installing fixed foundation wind farms, will allow larger foundations and these may mean that there is less need for the more complex floating wind farms.
Gravitricity Makes Hydrogen Play With FlexiStore
The title of this post, is the same as that of this article on The Engineer.
This is the sub-heading.
Edinburgh-based energy storage firm Gravitricity is looking to green hydrogen, bringing a new underground storage solution to market.
The system is explained with a large graphic, showing an electrolyser, a FlexiStore and a hydrogen filling station, with this paragraph underneath.
Known as FlexiStore, the concept involves purpose-built, steel-lined shafts capable of holding up to 100 tonnes of compressed hydrogen at 220 bar – around 3.33GWh of energy, or enough to refuel over 1,000 HGVs, according to Gravitricity. Unlike naturally occurring underground storage like salt caverns, FlexiStores could be positioned anywhere, with the current plan to co-locate the storage as close as possible to renewable generation. Gravitricity says a single FlexiStore could serve a 460MW wind farm and that 1,000 units could meet the UK’s predicted hydrogen storage needs in 2050.
Note.
- The concept certainly solves the problem of storing hydrogen on a country-wide basis.
- I suspect, a machine could be designed and built to create the shafts.
- A 3.33 GWh store could supply 460 MW for nearly 33 hours. As a Control Engineer, that sounds a good balance for backing up a wind farm!
As ARUP has been involved in a feasibility study, I suspect there’s a fair chance that FlexiStores can be built.
Norway’s Answer To Wind Power Intermittency Lies Offshore – Study
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the first paragraph.
SINTEF has revealed in its recent study that there is no statistical covariation or systematic correlation in time between the occurrence of offshore wind conditions in southern and northern Norway, and adds that this knowledge will increase the commercial value of Norwegian offshore wind energy.
It does seem lucky for the Norwegians, that their wind farms appear to be able to supply a more constant amount of electricity, than many of those against wind farms would have you believe.
I hope that a reputable UK agency or university, is doing a similar analysis for UK wind farms.
World’s First Floating Offshore Wind Farm Celebrates Five Years Of Operation
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Hywind Scotland, the first floating offshore wind farm in the world, has passed five years in operation since its commissioning in 2017.
And this is the first paragraph.
According to Equinor, Hywind Scotland is the world’s best-performing offshore wind farm, achieving a capacity factor of 54 per cent over its five years of operations.
Note.
- Hywind Scotland is a 30 MW wind farm with five turbines.
- The capacity faction is much higher than a windfarm with fixed foundations.
- The water depth is between 95 and120 metres.
- The wind farm is 30 km. off Peterhead.
There is at least 15 GW of floating wind farms being planned in UK waters before 2030.
Conclusion
The wind farm has made a good start for the first floating wind farm.
Danes Talk 62 MW Offshore Wind Turbines For North Sea Energy Island
The title of this post, is the same as that of this article on Offshore Energy.
The Danes may talk 62 MW, but that four times larger than one of the biggest today, that I wrote about in Vestas 15 MW Prototype Turbine Produces First Power.
This paragraph says a bit more about the 62 MW turbine.
According to the DEA’s framework document for the draft plan for the strategic environmental assessment (SEA), this could be a 500-metre-tall wind turbine with a rotor diameter of 480 metres and a capacity of up to 62 MW.
This turbine is bigger in terms of capacity, than than some whole farms.
