Wind And Solar Boom Will Bring Energy Surplus
The title of this post, is the same as that of this article on The Times.
Under the picture, is this sub-title.
The government has set a target of 50 gigawatts of offshore wind farms by 2030, up from about 10 gigawatts at present.
According to this Wikipedia list of offshore wind farms, the UK currently has 2180 offshore turbines with a capacity of 8113 MW.
These wind farms appear to be planned.
Hornsea
The Hornsea wind farm is currently supplying 1.2 GW to the grid, but it is planned to be expanded to 6 GW, which is another 4.8 GW.
East Anglia Array
The East Anglia Array is currently supplying 0.7 GW to the grid, but it is planned to be expanded to 7.2 GW, which is another 6.5 GW.
Sofia
The Sofia wind farm will supply 1.4 GW from 2026.
Moray East
The Moray East wind farm will supply 0.95 GW from 2022.
Neart Na Gaoithe
The Neart Na Gaoithe wind farm will supply 0.45 GW from 2023.
Triton Knoll
The Triton Knoll wind farm will supply 0.86 GW from 2022.
Seagreen
The Seagreen wind farm will supply 1.1 GW from 2023.
Dogger Bank
The Dogger Bank wind farm will supply 3.6 GW from 2025.
Moray West
The Moray West wind farm will supply 1.2 GW from 2025.
Rampion 2
The Rampion 2 wind farm will supply 1.2 GW before 2030.
Norfolk Boreas
The Norfolk Boreas wind farm will supply 1.8 GW before 2030
Norfolk Vanguard
The Norfolk Vanguard wind farm will supply 1.8 GW before 2030
These wind farms total up to 31.1 GW
Morgan And Mona
The Morgan and Mona wind farms will supply 3 GW from 2028.
ScotWind
This map shows the wind farms in the latest round of leasing in Scotland.
These wind farms should be providing 24.8 GW by 2030.
Celtic Sea
In Two More Floating Wind Projects In The Celtic Sea, I give details of six wind farms to be developed in the Celtic Sea, that will produce a total of 1.2 GW.
All should be delivered by 2030.
Northern Horizons
In Is This The World’s Most Ambitious Green Energy Solution?, I talk about Northern Horizons, which will produce 10 GW of wind energy from 2030.
An Armada Of Wind Farms
As many of these wind farms will be floating and wind-powered, the collective noun must surely be an armada.
These are some figures.
- The size is certainly spectacular at 70.1 GW.
- As the UK electricity consumption in 2020-2021 was 265.4 TWh, the average hourly production throughout the year is 30.3 GW.
- As I write this post, the UK is generating 30.1 GW.
As the best offshore wind farms have a capacity factor of around fifty percent, we should be able to power the UK with wind power alone.
So when The Times says this in the first two paragraphs of the article.
Britain will have excess electricity supplies for more than half of the year by 2030 as a huge expansion of wind and solar power transforms the energy system, a new analysis suggests.
Energy storage technologies, including batteries and electrolysers to make hydrogen, will need to be deployed at massive scale to prevent this surplus electricity going to waste, according to LCP, a consultancy.
The article would appear to correct.
The Need For Energy Storage
If we look at energy production at the current time, energy production is as follows.
- Biomass – 0.5 GW
- Gas – 17 GW
- Nuclear – 5 GW
- Onshore Wind – 12 GW with 20 % capacity factor – 2.4 GW
- Offshore Wind – 8.1 GW with 30 % capacity factor – 2.4 GW
- Interconnects – 0.4 GW
- Others – 0.5 GW
This totals up to 28.2 GW.
In 2030, energy production could be as follows.
- Biomass – 0.5 GW
- Nuclear – 5 GW
- Onshore Wind – 12 GW with 20 % capacity factor – 2.4 GW
- Offshore Wind – 30 GW with 30 % capacity factor – 9 GW
- Floating Offshore Wind – 40 GW with 50 % capacity factor – 20 GW
- Others – 0.5 GW
This totals up to 37.4 GW.
So if you take a typical day, where on average throughout the day we are producing around 7 GW more of electricity than we need, we will actually produce around 7 * 24 GWh = 168 GWh of excess electricity
Whichever was you look at it, we have got to do something concrete with a large amount of electricity.
- Store it in batteries of various types from lithium ion, through new types of batteries like those being developed by Highview Power and Gravitricity to pumped hydro storage.
- Store the energy in the batteries of electric cars, vans, buses, trucks, trains and ships.
- Store the energy in Norwegian pumped hydro storage.
- Convert it to hydrogen using an electrolyser and blend the hydrogen with the natural gas supply.
- Convert it to hydrogen using an electrolyser and use the hydrogen to make zero-carbon steel, concrete and chemicals.
- Convert it to hydrogen using an electrolyser and develop new zero-carbon industries.
- Convert it to hydrogen using an electrolyser and store the hydrogen in a depleted gas field.
- Sell it to Europe, either as electricity or hydrogen.
Note.
- We are going to have to build a lot of batteries and I suspect they will be distributed all round the country.
- We are going to have to build a lot of hydrogen electrolysers.
- We have world class battery and electrolyser companies.
We should also fund the following.
- Developments of technology, that makes better batteries, electrolysers, boilers and heat pumps.
- I would also do a lot of work to increase the capacity factor of wind farms.
I also believe that if we have masses of electricity and hydrogen, we might find as a country, it’s very beneficial in terms of jobs, exports and a healthier economy to invest in certain industries.
Conclusion
The future is rosy.
Shell And ScottishPower Win Bids To Develop 5 GW Of Floating Wind Power In The UK
The title of this post, is the same as that of this press release from Shell.
This is three paragraphs from the press release.
Shell and ScottishPower have secured joint offers for seabed rights to develop large-scale floating wind farms as part of Crown Estate Scotland’s ScotWind leasing. The partners have won two sites representing a total of 5 gigawatts (GW) off the east and north-east coast of Scotland.
The new wind farms will be delivered through two joint ventures called MarramWind and CampionWind. They bring together ScottishPower’s and Shell’s decades of experience working offshore and significant presence in Scotland, as well as their strong innovation capabilities for delivering world-class offshore energy projects.
The development, construction and operation of ScotWind projects is set to bring new skilled jobs and manufacturing opportunities and boost local supply chains.
ScottishPower are actually involved in three large ScotWind projects; one by themselves and two in partnership with Shell.
MacHairWind
MachairWind is a project that Scottish Power is developing alone.
- It has its own page on the ScottishPower Renewables web site.
- It will be a 2 GW wind farm to the North-West of Islay.
- The turbines will be on fixed foundations.
I wrote about this project in MacHairWind Wind Farm.
MarramWind And CampionWind
These two wind farms are being developed in partnership with Shell.
They both have their own web sites.
MarramWind’s web site has this introduction.
ScottishPower and Shell have joined forces to develop the MarramWind offshore windfarm following success in the recent ScotWind auction process by Crown Estate Scotland.
Located 75 kilometres off the North East coast of Scotland in water depths averaging 100 metres, the proposed MarramWind floating offshore windfarm could deliver up to 3 gigawatts (GW) of cleaner renewable energy.
This map clipped from the MarramWind web site, shows the location of the wind farm.
CampionWind’s web site has this introduction.
ScottishPower and Shell have joined forces to develop the CampionWind offshore windfarm following success in the recent ScotWind auction process by Crown Estate Scotland.
Located 100 kilometres from the east coast of Scotland, in water depths averaging 77 metres, the proposed CampionWind floating offshore windfarm could deliver up to 2 gigawatts (GW) of cleaner renewable energy.
This map clipped from the CampionWind web site, shows the location of the wind farm.
Note.
- The two wind farms will be within a few miles of each other.
- Both wind farms will use floating wind turbines.
- The water is a bit deeper at MarramWind, but this surely doesn’t bother a floating turbine.
- MarramWind and CampionWind will have a total capacity of 5 GW.
- Hywind Scotland is the world’s first commercial wind farm using floating wind turbines, situated 29 kilometres off Peterhead. This wind farm is only 30 MW, but in its first years of operation has achieved a capacity factor of over 50 %.
- The proposed turbines at Northern Horizons‘ 10 GW wind farm, which is 130 kilometres to the North-East of Shetland will be 20 MW giants and nearly as tall as The Shard in London.
So will Scottish Power and Shell design and build a combined field, similar in concept to Northern Horizons’ wind farm, using an armada of 250 floating wind turbines?
- The wind turbines might be moored around a fixed or floating mother platform or structure, that will collect the electricity and deliver it to the shore.
- Turbines could be serviced in situ or moved into port, as needed.
- Extending the wind farm could just be a matter of mooring the extra turbines in position and then connecting them to the mother platform.
- Is there a convenient disused oil or gas platform, that could be repurposed as the mother platform?
It certainly would appear to be a way of building large offshore fields in deep waters.
Where Would The Combined MarramWind And CampionWind Rank In Terms of UK Wind Farms?
Consider.
- MarramWind and CampionWind will have a total capacity of 5 GW.
- Phase one of the Hornsea Wind Farm is the largest offshore wind farm in the world, with a capacity of just over 1.2 GW and when complete it will have a capacity of 6 GW.
- Northern Horizons is planned to be 10 GW.
- The East Anglian Array could be as large as 7.2 GW.
- The Dogger Bank Wind Farm is planned to be as large as 4.8 MW.
- Norfolk Vanguard and Norfolk Boreas are a pair of 1.8 GW wind farms.
- MacHairWind will be a 2 GW wind farm.
Note.
- This is not a complete list of large wind farms in the development pipeline.
- BP have obtained leases, but have not published their plans.
- Most farms under development are at least one GW.
- These farms are a total of 38.6 GW.
The Combined MarramWind and CampionWind would be one of several large wind farms around 5 GW.
There Is A Desperate Need For Energy Storage
If we are generating upwards of 40 GW of wind and solar energy in the UK, there will be a desperate need for energy storage to cover for the times, when the wind doesn’t blow and the sun doesn’t shine.
Scotland should be OK, as there are various energy storage projects in development.
- The 1.5 GW/ 30 GWh Coire Glas project is according to SSE shovel-ready and has planning permission.
- The 450 MW/2.8 GWh Red John project is being constructed.
- Drax, ILI Group and SSE have several other projects under development.
So what would happen in the South?
The government appears to be on the case as I wrote in Ministerial Roundtable Seeks To Unlock Investment In UK Energy Storage.
But there is also the possibility of using hydrogen.
- Hydrogen could be created by a series of giant electrolysers.
- It could be blended with natural gas to eke out our natural gas and save carbon. According to HyDeploy, it appears that up to 20 % can be added, without needing to change boilers and appliances.
- It can be stored in depleted offshore gas fields.
- It can be used to power heavy transport like buses, trucks, trains and ships.
- It can be burned in gas-fired power stations to generate electricity.
Hydrogen can also be used as a feedstock or green energy source for the making of chemicals, concrete and steel.
Conclusion
We are approaching the end of the first phase of the development of renewable energy in the UK.
Massive floating wind farms using armadas of floating wind farms, a large expansion of pumped storage hydro and a huge expansion of the use of hydrogen will see us through to a carbon-free future.
MacHairWind Wind Farm
MachairWind wind farm has its own page on the ScottishPower Renewables web site.
These are the two introductory paragraphs.
The MacHairWind project off the coast of Islay, which could deliver 2GW of cleaner renewable energy, will make a significant contribution to tackling climate change and achieving Net Zero, with the potential to generate enough clean electricity to power over 2 million homes in Scotland.
It will also build on ScottishPower’s long-standing presence and positive track record of investing in and working with local communities and businesses across Argyll & Bute to realise the benefits of renewable energy developments.
This Google Map shows the area of the wind farm, which is to the North West of the island of Islay.
Note.
- There certainly is a large space of empty sea to the North-West of Islay.
- Glasgow is not far away.
This second Google Map shows the area to the North-East of Islay.
Note.
- Islay is in the South-West corner of the map.
- Colonsay is the smaller island to the North.
- In the North-East corner of the map the red arrow indicate Cruachan pumped hydro power station.
- In the South-East corner of the map is the Clyde Estuary, where the two nuclear power stations at Hunterston were located.
- Hunterston is also the Northern end of Western HVDC Link to North Wales.
Wikipedia says this about the relationship of the Cruachan power station and Hunterston’s nuclear stations.
Construction began in 1959 to coincide with the Hunterston A nuclear power station in Ayrshire. Cruachan uses cheap off-peak electricity generated at night to pump water to the higher reservoir, which can then be released during the day to provide power as necessary.
Now that the two nuclear stations are being decommissioned, will the MacHairWind wind farm be used to pump water to Cruachan’s higher reservoir?
Conclusion
The MacHairWind wind farm seems a well-positioned wind farm.
- It is close to Glasgow.
- It can be used in tandem with the Cruachan pumped hydro power station.
- It will have access to the Western HVDC Link to send power to the North-West of England.
Is Scotland replacing the 1.2 GW Hunterston B nuclear power station with a 2 GW wind farm, with help from Cruachan and other proposed pumped storage hydro schemes to the North of Glasgow?
It also looks like increasing the power at Cruachan from the current 440 MW to a GW, by the building of Cruachan 2 would give the area even more energy security.
Loch Kemp Pumped Hydro
Loch Kemp Is a smaller loch just to the East of Loch Ness.
This Google Map shows Loch Kemp in relation to Loch Ness.
Note.
- Loch Ness is in the North West corner of the map, with partial cloud cover.
- Loch Kemp is in the South East corner of the map.
The proposed Loch Kemp pumped hydro scheme will have these characteristics.
- Loch Kemp will be the upper reservoir.
- Loch Ness will be the lower reservoir.
- The power station will be on the banks of Loch Ness.
- The power station will be designed to fit into the environment.
- Eight dams will be built to enlarge Loch Kemp.
- Trees will be planted.
- Output of the power station will be 300 MW
- Available storage could be 9 GWh.
The station will have almost as much storage capacity as Electric Mountain, but that power station has an output of 1.8 GW.
In Glendoe Hydro Power Station, I wrote about the Glendoe Hydro Scheme.
- It is a 100 MW hydroelectric power station
- It has the highest head at 600 metres of any power station in the UK.
- It opened in 2009, making it one of the newest hydroelectric power stations in the UK.
- The actual power station is in an underground cavern.
- The dam and power station have been designed to be hidden from view.
This Google Map shows the location of Glendoe power station to the South of Loch Kemp.
Note.
- The red arrow indicates Loch Kemp.
- The loch in the South East corner is the reservoir that feeds Glendoe power station.
- Fort Augustus is at the Southern end of Loch Ness.
This Google Map shows the Northern end of Loch Ness.
Note.
- The red arrow indicates Loch Kemp.
- Foyers, which is a short distance to the North West, is the site of the Foyers pumped hydro scheme. I wrote about this scheme in The Development Of The Foyers Pumped Storage Scheme.
- Loch Duntelchaig, in the North-East corner of the map, is being used as the upper reservoir of the Red John pumped hydro scheme. I wrote about this project in Red John Pumped Storage Hydro Project.
On the East side of Loch Ness there seems to be four substantial hydro-electric schemes.
In order from South to North these schemes are.
Glendoe
Glendoe is a modern 100 MW hydroelectric power station, that opened in 2009.
In Glendoe Hydro Power Station, I felt it might be possible to expand Glendoe into a pumped hydro scheme, with upwards of 10 GWh of storage.
Loch Kemp
Loch Kemp is a proposed 300 MW/9 GWh pumped hydro storage station.
Foyers
Foyers is an existing 300 MW/10 GWh pumped hydro storage station.
Red John
Red John is a proposed 450 MW/2.8 GWh pumped hydro storage station, which has received planning permission.
These four power stations could be summarised as follows.
- Glendoe – 100 MW/10 GWh
- Loch Kemp – 300 MW/9 GWh
- Foyers – 300 MW/10 GWh
- Red John – 450 MW/2.8 GWh
Note.
- Totals are 1150 MW and 31.8 GWh
- Foyers was converted from a conventional hydroelectric power station, that was opened in 1895 to a pumped hydro storage station.
- If Foyers can be converted, why can’t Glendoe.
A very large pumped storage station of four separate units, can be built on the East side of Loch Ness.
Conclusion
This is only on the East side of Loch Ness, so if the West side can be similarly developed, Loch Ness could be developed into a real Loch Ness monster with over 60 GWh of pumped hydro storage.
Plan For New Nuclear Reactors At Wylfa And Trawsfynydd A Step Closer As Natural Resource Wales Looks At Designs
The title of this post, is the same as that of this article on nation.cymru.
These are the first two paragraphs.
Plans for new nuclear power stations at Trawsfynydd and Wylfa have taken a step closer after the UK Government asked government regulators to assess designs for the reactors.
Natural Resources Wales will be among those assessing the designs by Rolls-Royce, with both Wylfa and Trawsfynydd have been named as potential sites for housing them within the UK.
These are points about the reactors.
- They will cost £1.8 billion each.
- They are capable of powering a city the size of Cardiff, which has a population of about half-a-million.
- I’ve read elsewhere that the reactors are planned to have a nameplate capacity of 470 MW.
The article did mention, that the Nimbys were lining up.
The Wylfa Site
The original Wylfa power station was a Magnox nuclear station generating 980 MW, that was decommissioned in 2015.
This Google Map shows the location of the site on Anglesey.
This second Google Map shows the site in more detail.
The power station doesn’t appear to have had a rail link, but there is a railway line a few miles away, with sidings that might have been used to handle fuel flasks.
There has been a proposal for a hybrid plant consisting of a wind farm and small modular nuclear reactors, which is described in this Wikipedia section, where this is said.
In January 2021, Shearwater Energy presented plans for a hybrid plant, to consist of a wind farm and small modular reactors (SMRs), to be installed adjacent to the existing Wylfa power station but separate from the proposed Wylfa Newydd site. Shearwater has signed a memorandum of understanding with NuScale Power for the SMRs. The plant could start generation as early as 2027 and would ultimately produce up to 3 GW of electricity and power a hydrogen generation unit producing up to 3 million kg of hydrogen per year.
Note.
- Wylfa Newydd was a proposal by Hitachi to build a nuclear station on the site.
- Shearwater Energy is a UK developer of energy opportunities.
- NuScale Power is an American company with its own design of small modular nuclear reactor.
In Holyhead Hydrogen Hub Planned For Wales, I talked about hydrogen and the port of Holyhead.
The Trawsfynydd Site
The original Trawsfynydd power station was a Magnox nuclear station generating 470 MW, that was decommissioned in 1991.
This Google Map shows the location of the site in North Wales.
This second Google Map shows the site in more detail.
Note.
- The power station was built on the Northern shore of Llyn Trawsfynydd.
- Llyn Trawsfynydd is a man-made lake, that was built in the 1920s to supply water to the 24 MW Maentwrog hydro electric power station.
- There is a railway from near the site, that connects to the Conwy Valley Line at Blaenau Ffestiniog.
The Trawsfynydd site is a lot more than just a decommissioned Magnox power station.
Pumped Energy Storage In Snowdonia
Currently, there are two existing pumped storage in Snowdonia.
- Dinorwig power station, which is often called Electric Mountain, which has a capacity of 9.1 GWh.
- Ffestiniog power station, which has a capacity of around 1 GWh. If anybody has a better figure let me know!
A third scheme is under development at Glyn Rhonwy, which could have a capacity of 700 MWh.
Looking at the size of Llyn Trawsfynydd, I do wonder, if it could be the top lake of a future pumped storage scheme.
- Llyn Trawsfynydd, contains 40 million tonnes of water.
- There is a head of 190 metres.
That could give energy storage of 20 GWh. That sounds a lot of GWhs! But with two possible small modular nuclear reactors at possibly 500 MW each nearby and some help from windfarms, it could be filled within a day, if there is a suitable low-level reservoir.
Rolls-Royce And The Duisburg Container Terminal
In Rolls-Royce Makes Duisburg Container Terminal Climate Neutral With MTU Hydrogen Technology, I showed how Rolls-Royce and its subsidiary were providing an innovative climate neutral solution for Duisburg Container Terminal in Germany.
A North West Wales Powerhouse
Could Rolls-Royce be planning a Duisburg-style solution for North West Wales.
- Small modular nuclear reactors at Wylfa and Trawsfynydd.
- Hydrogen electrolysers to create hydrogen for the Port of Holyhead and heavy transport.
- Adequate pumped hydro storage for surplus energy.
But there could be little serious above-ground construction.
Conclusion
Something is awakening in North West Wales.
Scotland’s Energy Storage
I have been using the web sites of Drax Group, SSE Renewables and ILI Group, and this page from Strathclyde University to look at various hydro-electric schemes to store energy using the tried-and-tested method of pumped hydro.
I have analysed these schemes.
Affric/Beauly
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
Situated about 16 kilometres to the west of Inverness, Beauly is the gateway to the Affric/Beauly hydro electric scheme.
Currently, it generates a maximum power of 100.3 MW.
My analysis in Repurposing The Affric/Beauly Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Affric/Beauly scheme could support 78 GWh of pumped storage in one scheme at Fasnakyle.
- Adding pumped storage facilities to the Affric/Beauly hydro-electric scheme, with a capacity of upwards of a conservative 50 GWh, should be possible.
Generating capacity and system operation could be improved by replacing some or all of the 1950s and 1960s turbines with modern units and using modern control systems.
The Affric/Beauly hydro-electric scheme could be augmented by upwards of 50 GWh of storage.
Balliemeanoch
This new scheme is being developed by the ILI Group.
From what is published in the press. it appears to be a giant 1.5 GW/45 GWh project.
In Thoughts On The Balliemeanoch Pumped-Hydro Scheme, I analyse the plan.
The Balliemeanoch hydro-electric scheme could add 45 GWh of storage.
Balmacaan
This new scheme is being developed by SSE Renewables.
My searches in A Possible Balmacaan Pumped Storage System, showed the following.
It has a 600 MW generating capacity and I suspect would have about 15-20 GWh of storage.
The Balmacaan hydro-electric scheme could conservatively add upwards of 15 GWh of storage.
Breadalbane
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
The Breadalbane scheme is set in the mountainous region around Loch Lyon, Loch Tay and Loch Earn in Perthshire.
Currently, it generates a maximum power of 168.4 MW.
My analysis in Repurposing The Breadalbane Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Breadalbane scheme could support 12 GWh of pumped storage in one scheme at Ben Lawers.
- I believe a similar scheme could be built South of Loch Tay to add a similar amount of pumped storage capacity.
As with the Beauly/Affric scheme, generating capacity and system operation could be improved by replacing some or all of the 1950s and 1960s turbines with modern units and using modern control systems.
The Breadalbane hydro-electric scheme could be augmented by upwards of 12 GWh of storage.
Coire Glass
This new scheme is being developed by SSE Renewables and the project has its own web site, which introduces the scheme like this.
Coire Glas is a hydro pumped storage scheme with a potential capacity of up to 1500MW. Coire Glas is an excellent pumped storage site with a large lower reservoir (Loch Lochy) and a significant elevation of more than 500m between the lower and the new upper reservoir site over a relatively short distance.
It is planned to generate a maximum power of up to 1.5 GW for twenty hours, which indicates an energy storage capacity of 30 GWh.
In SSE Renewables Launches 1.5GW Coire Glas Construction Tender, I talk about the current status of the project.
The Coire Glas hydro-electric scheme could add 30 GWh of storage.
Conon
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
The Conon scheme lies within the northwest Highlands, broadly between Inverness and Ullapool. Electricity generation started here when the Ross-shire Electricity Supply Company built the small Falls of Conon hydro electric power station in the 1920s.
Currently, it generates a maximum power of 107.2 MW.
My analysis in Repurposing The Conon Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Conon scheme could support up to 131 GWh of pumped storage.
- Adding pumped storage facilities to the Conon hydro-electric scheme, with a capacity of upwards of a conservative 30-40 GWh, should be possible.
As with other schemes, generating capacity and system operation could be improved by replacing some or all of the 1950s turbines with modern units and using modern control systems.
The Conon hydro-electric scheme could be augmented by upwards of 30 GWh of storage.
Corrievarkie
This new scheme is being developed by the ILI Group.
From the planning application it appears to be a 600 MW/14.5 GWh project.
In Corrievarkie Pumped Storage Hydro Project, I analyse the plan.
The Corrievarkie hydro-electric scheme could add 14.5 GWh of storage.
Cruachan
Cruachan is a pumped-storage power station, that is owned by Drax, which have a comprehensive web site for the power station.
- It has an output of 440 MW.
- It has an energy storage capacity of 7.1 GWh
- It can can reach full generating capacity in less than 30 seconds.
In Drax’s Plans For Cruachan, I analyse Drax’s plans, which they call Cruachan 2.
- It will be a 600 MW power station.
- It will be to the East of the current power station.
- More than a million tonnes of rock would be excavated to build the power station.
The existing upper reservoir, which can hold 2.4 billion gallons of water, has the capacity to serve both power stations.
These was my conclusions.
It looks like very good engineering to me.
- There is a good chance, that on most nights, the reservoir will be filled using wind energy
- The maximum output of the Cruachan power station has been more than tripled from 323 to 1010 MW.
- There has been no increase in the size of the Cruachan reservoir.
Scotland will now have a GW-sized hydro-electric power station.
It will not be very much smaller than Sizewell B nuclear station.
Foyers
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
The current Foyers Power Station operates quite differently to conventional hydro electric power stations. Foyers hydro scheme consists of one pumped hydro power station and one hydro power station and one major dam..
Currently, it generates a maximum power of 305 MW.
My research and analysis in The Development Of The Foyers Pumped Storage Scheme, showed the following.
- Foyers is a modern pumped-hydro scheme with a capacity of 10 GWh.
- The updating of the original 1896 hydro-power station to a modern pumped-storage system in 1974 is a superb example of hydro-power engineering.
The development of Foyers power station is an example, that shows what can be done in other hydro-electric schemes around Scotland and the rest of the world.
Galloway
Galloway is a hydroelectric scheme, that is owned by Drax, which have a comprehensive web site for their two hydroelectric schemes in Scotland; Galloway and Lanark.
- Galloway has a total output of 109 MW.
- It has six power stations at Drumjohn, Kendoon, Carsfad, Earlstoun, Glenlee and Tongland.
- There is no energy storage
- It is what is known as a run-of-the-river scheme.
The scheme opened in the 1930s.
Glendoe
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
In 2009, the first major hydro electric power station to be built in Scotland for almost 30 years, Glendoe on the eastern shore of Loch Ness, began generating electricity.
Currently, it generates a maximum power of 106.5 MW.
My analysis in Glendoe Hydro Power Station, led me to conclude, that engineers will look at this scheme built in the early years of this century to convert it to a pumped storage facility. It might even have been designed for conversion to a pumped storage station, as it was built after the successful conversion of Foyers power station. Comparing the size of the upper lake to Foyers and other schemes, I would estimate it could easily provide in excess of 15 GWh of storage.
The Glendoe hydro-electric scheme could be augmented by upwards of 15 GWh of storage.
Glenmuckloch
This is a small scheme promoted by Buccleuch, that generates 4 MW and stores 1.6 GWh in a disused opencast coal mine.
My analysis in The Glenmuckloch Pumped Storage Scheme, led me to this conclusion.
This project appears to have stalled, but I do like the idea of using a disused mine to store energy and the engineering behind the project.
I will ignore it in my conclusions of this post.
Great Glen
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
The Great Glen runs for more than 100 kilometres from Inverness in the northeast, to Fort William in the southwest, following a geological fault line that divides north and south Scotland.
Currently, it generates a maximum power of 112.7 MW.
My analysis in Repurposing The Great Glen Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Great Glen scheme could support up to 90 GWh of pumped storage.
- Adding pumped storage facilities to the Great Glen hydro-electric scheme, with a capacity of upwards of a conservative 30 GWh, should be possible.
As with other schemes, generating capacity and system operation could be improved by replacing some or all of the 1950s and 1960s turbines with modern units and using modern control systems.
The Great Glen hydro-electric scheme could be augmented by upwards of 30 GWh of storage.
Lanark
Lanark is a hydroelectric scheme, that is owned by Drax, which have a comprehensive web site for their two hydroelectric schemes in Scotland; Galloway and Lanark.
- Lanark has a total output of 17 MW.
- It has two power stations at Bonnington and Stonebyres.
- There is no energy storage
- It is what is known as a run-of-the-river scheme.
The scheme opened in the 1920s.
Red John
This new scheme is being developed by ILI Group and the project has its own web site, which introduces the scheme like this.
Between 2007 and 2015, the total installed capacity of renewables electricity in Scotland has more than doubled. Due to its intermittent nature, the rise in renewable generation has resulted in increased demand for flexible capacity to help meet energy balancing requirements for the national grid system.
Pumped storage hydro is considered by the Directors to be the most developed and largest capacity form of grid energy storage that currently exists. This can help reduce renewable energy curtailment and therefore promote grid stability.
The web site says this about the project.
- The scheme has an output of 450 MW.
- The storage capacity is 2.8 GWh.
- The scheme has planning consent.
- The project is budgeted to cost £550 million.
- The construction program indicates that the scheme will be completed by the end of 2025.
It also has very detailed maps.
I wrote about the project in Red John Pumped Storage Hydro Project, where I came to these conclusions.
- This scheme has the output of a large gas-fired power station for just over six hours.
- The finances must add up, as no-one would back a scheme like this if they didn’t get an adequate return on their money.
It may only be a small scheme, that is a quarter of the size of the existing nearby Foyers pumped-storage scheme, but as it is shovel-ready, we should start digging.
The Red John hydro-electric scheme would add 2.8 GWh of storage.
Shin
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
Shin is Scotland’s most northerly hydro electric scheme. It utilises water from a 650 square kilometre catchment area in Sutherland, including Loch Shin, and water from the River Cassley and River Brora.
Currently, it generates a maximum power of 32.1 MW.
My analysis in Shin Hydro Power Scheme, showed the following.
- I would be very surprised if any pumped storage were to be added to this scheme.
- This 1950s scheme has been partially updated.
Perhaps some more updating would be worthwhile.
Sloy/Awe
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
With the exception of Cruachan Power Station which was commissioned in 1965, major work on the Sloy/Awe scheme was completed by 1963, the year the Beatles had their first No 1 hit with From Me To You – and a world away from the immediate post-war austerity being experienced when Sloy Power Station was commissioned just 14 years earlier.
Currently, it generates a maximum power of 261.9 MW.
My analysis in Repurposing The Sloy/Awe Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Sloy/Awe scheme could support up to 68 GWh of pumped storage.
- Adding pumped storage facilities to the Sloy/Awe hydro-electric scheme, with a capacity of upwards of a conservative 40 GWh, should be possible.
As with other schemes, generating capacity and system operation could be improved by replacing some or all of the 1930s and 1950s turbines with modern units and using modern control systems.
The Sloy/Awe hydro-electric scheme could be augmented by upwards of 40 GWh of storage.
Tummel Valley
The scheme is now owned by SSE Renewables and has a page on their web site, which introduces the scheme like this.
The Tummel scheme stretches from Dalwhinnie, famous for its whisky distillery, in the north, to the remote Rannoch Station in the west, and the highly-popular tourist town of Pitlochry in the east.
Currently, it generates a maximum power of 309.2 MW.
My analysis in Repurposing The Tummel Hydro-Electric Scheme, showed the following.
- Research from Strathclyde University, says that the Tummel Valley scheme could support up to 135 GWh of pumped storage.
- Adding pumped storage facilities to the Tummel Valley hydro-electric scheme, with a capacity of upwards of a conservative 40-60 GWh, should be possible.
As with other schemes, generating capacity and system operation could be improved by replacing some or all of the 1930s and 1950s turbines with modern units and using modern control systems.
The Tummel Valley hydro-electric scheme could be augmented by upwards of 40 GWh of storage.
A Simple Summary
These are deliberately conservative figures from my analysis.
- Affric/Beauly – 50 GWh
- Balliemeanoch – 45 GWh
- Balmacaan – 15 GWh
- Breadalbane – 12 GWh
- Coire Glas – 30 GWh
- Conon – 30 GWh
- Corrievarkie – 14.5 GWh
- Glendoe – 15 GWh
- Great Glen – 30 GWh
- Red John – 2.8 GWh
- Sloy/Awe – 40 GWh
- Tummel Valley – 40 GWh
Note.
- With new storage like Balliemeanoch, Balmacaan, Coire Glas, Corrievarkie and Red John, I am using published figures where they are available.
- With figures from existing schemes,I am being deliberately very conservative.
That is a total of 324.3 GWh with 107.3 GWh down to new storage
Strathclyde University’s Prediction
This page on the Strathclyde University web site, gives these figures for the possible amounts of pumped-storage that can be added to existing schemes.
- Errochty – 16
- Glasgarnock – 23
- Luichart – 38
- Clunie – 40
- Fannich – 70
- Rannoch – 41
- Fasnakyle – 78
- Tummel – 38
- Ben Lawers – 12
- Nant – 48
- Invermoriston – 22
- Invergarry – 41
- Quoich – 27
- Sloy – 20
That is a total of 514 GWh or 621.3 GWh if you include new storage.
Conclusion
Scotland and the UK, has been left a superb legacy for the future by the pioneering work of Scottish engineers and the North of Scotland Hydroelectric Board.
Most of these assets are now in the hands of two groups; Scottish and Southern Energy (SSE) and Drax Group.
Having seen several of the schemes detailed in this post, in the last few weeks, on Michael Portillo’s; Great Coastal Railway Journeys, it does seem that both groups are looking after their assets.
SSE and Drax also seem to be doing their best to publicise the success of one of the UK’s high-value, but low-profile engineering assets.
I believe that we should do a survey that would identify the following.
- What needs to be done to allow each aqueduct, dam, power station and tunnel to continue to function until a given date in the future.
- Which of the individual schemes can be updated to larger schemes or pumped storage systems.
We would then be able to device a long term plan to create a world-class hydro-electric power scheme for Scotland.
Scotland should be able to provide upwards of 400 GWh of pumped-storage.
This article on Current News is entitled Up To 24GW Of Long Duration Storage Needed For 2035 Net Zero Electricity System – Aurora.
These are the first three paragraphs.
Deploying large quantities of long duration electricity storage (LDES) could reduce system costs and reliance on gas, but greater policy support is needed to enable this, Aurora Energy Research has found.
In a new report, Aurora detailed how up to 24GW of LDES – defined as that with a duration of four hours or above – could be needed to effectively manage the intermittency of renewable generation in line with goals of operating a net zero electricity system by 2035. This is equivalent to eight times the current installed capacity.
Additionally, introducing large quantities of LDES in the UK could reduce system costs by £1.13 billion a year in 2035, cutting household bills by £26 – a hot topic with energy bills on the rise as a result of high wholesale power prices.
The report also says that long duration storage could cut carbon emissions by ten million tonnes of carbon dioxide per year.
It appears to me, Scotland can provide more than enough energy storage for the UK and the Island of Ireland, even if the seas around the British Isles were almost completed covered by wind turbines.
In addition, to the works in Scotland to update the various hydroelectric schemes, there would need to be more interconnectors around the UK and probably to close countries like Belgium, Denmark, France, Germany, the Netherlands and Norway.
There could even be an interconnector between Iceland and Scotland, so Iceland’s abundance of zero-carbon electricity could be exported to Europe.
The Glenmuckloch Pumped Storage Scheme
This article on the BBC is entitled Glenmuckloch Opencast Mine Hydro Energy Scheme Approved.
- It appears to be capable of generating 400 MW.
- Energy storage capability appears to be 1.6 GWh.
- It is to be built in a disused opencast coal mine.
It is only a small scheme, but it does seem to have planning approval.
The Scheme has a web page, which is entitled Glenmuckloch Pumped Storage Hydro
- It is being promoted by Buccleuch and 2020 Renewables and respected consultants; Arup has produced this Non-Technical Summary.
- The Non-Technical Summary is a very professional document and an interesting read.
- 2020 Renewables are now part of Forsa Energy.
- It is certainly an interesting way of removing the remains of an opencast coal mine.
According to this article on the BBC, which is entitled Buyer Sought For £250m Hydro Scheme At Glenmuckloch, the project now appears to be for sale.
Whether it will sell will depend on the cost of realising the scheme, the finance and how much the scheme will earn.
Conclusion
This project appears to have stalled, but I do like the idea of using a disused mine to store energy and the engineering behind the project.
Repurposing The Sloy/Awe Hydro Scheme
The Sloy/Awe hydro-electric scheme was built in the 1930s and 1950s, by the North of Scotland Hydroelectric Board.
- The scheme is now owned by SSE Renewables and has a page on their web site.
- There are ten individual power stations; Sloy, Sron Mor, Clachan, Allt-na-Lairige, Nant, Inverawe, Inverawe, Loch Gair, Striven and Lussa.
- There are four dams; Sloy, Allt-na-Lairige and two dams at Shira.
- Cruachan used to be part of this scheme, but is now owned by Drax.
This map from the SSE Renewables web site shows the layout of the dams and power stations.
The sizes of the power stations in the scheme are as follows.
- Sloy – 152.5 MW
- Sron Mor – 5 MW
- Clachan – 40 MW
- Allt-na-Lairige – 6 MW
- Nant – 15 MW
- Inverawe – 25 MW
- Kilmelford – 2 MW
- Loch Gair – 6 MW
- Striven – 8 MW
- Lussa – 2.4 MW
This gives a total power of 261.9 MW.
It should be noted that Cruachan power station is also in this area and in Drax’s Plans For Cruachan, I talked about expanding the station from a 440 MW/7.1 GWh pumped-storage station to one of 1040 MW/7.1 GWh.
Scotland would appear to have 1.3 GW of hydro-electric power between Loch Awe and Loch Lomond.
This Google Map shows the same area as the SSE Renewables Map.
Note.
- Loch Awe, which is the sixth biggest freshwater loch in Scotland, is in the North-East corner.
- Loch Fyne, which is the longest sea loch in Scotland, is in the South-West corner.
- Loch Lomond, which is the second biggest freshwater loch in Scotland, is in the South-East corner.
- Loch Long reaches up from the South to the West of Loch Lomond.
These are four big lochs.
Strathclyde University And Pumped Storage Power For Scotland
This page on the Strathclyde University gives a list of the pumped storage potential for Scottish hydrogen-electric dams and power stations.
These figures are given for the dams and lochs in the Sloy/Awe scheme.
- Sloy – 20 GWh
- Nant – 48 GWh
It would appear that based on research from Strathclyde University, that the Sloy/Awe scheme could support over 60 GWh of pumped storage.
Water Flows In The Sloy/Awe Scheme
Looking at the SSE Renewables map of the Sloy/Awe scheme, water flows appear to be as follows.
- Loch Awe to Loch Etive via Inverawe power station.
- Cruachan reservoir to Loch Awe via Cruachan power station.
- Loch Nant to Loch Awe via Nant power station.
- Loch Nant to Loch Etive via Inverawe power station.
- Lochan Shira to Lochan Sron Mor via Sron Mor power station.
- Lochan Sron Mor to Loch Fyne via Clachan power station.
- Allt-na-Lairige reservoir to Loch Fyne via Allt-na-Lairige power station.
- Loch Sloy to Loch Lomond via Sloy power station.
All the water eventually flows into the sea to the West from Loch Etive and Loch Fyne.
Refurbishing And Repurposing The Sloy/Awe Scheme
Perhaps as the power stations are now over fifty years old, one simple way to increase the generating capacity of the Sloy/Awe scheme, might be to selectively replace the turbines, with modern turbines, that can generate electricity more efficiently.
I suspect that SSE Renewables have an ongoing program of improvements and replacements for all of their hydro-electric stations in Scotland. Some turbines at Sloy power station have already been replaced with larger ones.
Adding Pumped Storage To The Sloy/Awe Scheme
Strathclyde University picked out two places where pumped storage could be added; Sloy and Nant.
I discussed Sloy power station in A Lower-Cost Pumped Hydro Storage System and came to these conclusions.
- For £40 million, 14 GWh of pumped storage can be created at Sloy.
- But it could be bigger than 14 GWh, as this page on the Strathclyde University web site, says 20.4 GWh is possible.
- This would surely, be a project that could be first in the queue, once the environmental problems are solved.
20 GWh or even 14 GWh of pumped storage would be nice to have reasonably quickly.
As I said, this must be a high priority project.
The other project is at Loch Nant.
Note.
- Loch Nant is in the Western side of the map.
- Nant power station is marked by the red arrow.
- The loch to the South of the power station is Loch Awe.
- It appears that water can also go from Loch Nant to Inverawe power station to the North-East of the loch.
- Inverawe power station is on Loch Awe, which curves round Loch Nant.
- The 440MW/7.1 GWh Cruachan pumped-storage power station is on the other side of Loch Awe in the North East corner of the map, with the Cruachan dam and reservoir above.
Strathclyde University says that 48 MWh of pumped-storage could be possible at Loch Nant.
- Comparing the size of Cruchan reservoir at 7.1 GWh and the larger Loch Nant, gives me hope that Loch Nant could hold upwards of 20-30 GWh.
- From pictures on this page at Subterranea Britannica, it appears Nant power station has only a single 15 MW turbo-generator.
- Inverawe power station is a 25 MW power station with a single turbo-generator.
I suspect that pump-turbines could be installed to fill Loch Nant from Loch Awe, just as was done at Foyers, where a 300 MW pumped storage power station was created.
Conclusion
There would appear to be up to two schemes, that could each add around 20 GWh of pumped storage.
One advantage is that the waters of Loch Awe and Loch Lomond can be used for the lower reservoir.
Thoughts On The Balliemeanoch Pumped-Hydro Scheme
I first talked about the Balliemeanoch Pumped-Hydro Scheme in ILI Group To Develop 1.5GW Pumped Storage Hydro Project, which I wrote earlier this month.
I was a bit unsure as to where the high-level reservoir would be sited, although, the original report said the low-level reservoir was Loch Awe.
I then found this in an article on The Scotsman.
Project Balliemeanoch will see Lochan Airigh turned into a headpond containing 58 million cubic metres of water.
This Google Map shows Lochan Airigh.
At not much more than a hundred metres across, you wouldn’t call Lochan Airigh a large loch.
But look at its position compared to the village of Ballimeanoch on the shore of Loch Awe in this Google Map.
The North of Scotland Hydroelectric Board built Cruachan pumped-storage power station round the corner in Loch Awe in the early 1960s, so I would believe construction is possible.
But Cruachan is only a 7.1 GWh scheme, whereas Balliemeanoch is planned as a 45 GWh giant.
Repurposing The Breadalbane Hydro-Electric Scheme
The Breadalbane hydro-electric scheme was built in the 1950s and early 1960s, by the North of Scotland Hydroelectric Board.
- The scheme is now owned by SSE Renewables and has a page on their web site.
- There are seven individual power stations; Lubreoch, Cashlie, Lochay, Finlarig, Lednock, St Fillans and Dalchonzie.
- There are five dams; Lawers, Breaclaich, Lednock, Lubreoch and Giorra.
This map from the SSE Renewables web site shows the layout of the dams and power stations.
The sizes of the power stations in the scheme are as follows.
- Lubreoch – 4 MW
- Cashlie – 11 MW
- Lochay – 45 MW
- Finlarig – 16.5 MW
- Lednock – 3 MW
- St Fillans – 16.8 MW
- Dalchonzie – 4 MW
This gives a total power of 100.3 MW.
This Google Map shows Loch Tay.
Note
- Finlarig. where there is a power station, with a capacity of 16.5 MW.
- Ben Lawers dam, is to the West of Ben Lawers and is marked by a blue arrow.
- The biggest power station in the scheme is Lochay power station, which has a capacity of 45 MW.
- Lochay power station is to the West of Finlarig power station and both appear to be fed from Ben Lawers dam and others to the North.
This Google Map shows Loch Earn.
Note.
- Loch Earn is South of Loch Tay
- The red arrow indicates Dalchonzie power station.
- Dalchonzie power station has a generating capacity of only 4 MW.
This Google Map shows the location of Loch Lednoch between Loch Tay and Loch Earn.
Note that Lednoch has the 3 MW Lednoch power station at its Northern end.
This map shows to the West of Ben Lawers.
The red arrow indicate the rough location of the 11 MW Cashlie power station.
Is The Breadalbane Scheme Complete?
Looking at the dates of power station construction, I wonder if the dam builders concentrated in the early 1960s on the construction of Cruachan pumped storage station, which was constructed between 1959 and 1965.
Also to me, the Breadalbane scheme seems to have a lot of power stations and tunnels for just over 100 MW.
- At Rannoch, there is a 44 MW power station on the shores of Loch Rannoch, that was built in 1930.
- At Sloy there is a 152.5 MW power station on the shores of Loch Lomond, that was built in 1950.
I would have thought that a progression from Sloy, would have seen a large power station built on the shores of Loch Tay, whereas Lochay power station is only 44 MW.
This Google Map shows Lochan Breaclaich, which is a lake created by the construction of Breaclaich dam.
Lochan Breaclaich is marked by the red arrow and it is Loch Tay at the top of the map.
This page on the Canmore web site gives these details of Lochan Breaclaich and its dam.
Breaclaich dam is designed to prevent Loch Breachlaich and a number of other intakes from discharging into the Loch Tay catchment. A tunnel intake gatehouse is upstream of the dam and takes water via tunnel and pipeway through to Lednock power station.
The SSE map shows this tunnel to the North-Western end of Loch Lednoch, where the Lednoch power station is located.
It seems a lot of work was done to feed the power station, which has a capacity of just 3 MW.
Was it originally intended that Lochan Breaclaich would have fed a large power station on the Southern shore of Loch Tay?
Strathclyde University And Pumped Storage Power For Scotland
This page on the Strathclyde University gives a list of the pumped storage potential for Scottish hydrogen-electric dams and power stations.
These figures are given for the dams and lochs in the Breadalbane scheme.
- Ben Lawers – 12 GWh
It would appear that based on research from Strathclyde University, that the Breadalbane scheme could support 12 GWh of pumped storage.
Could this be augmented by a pumped-storage scheme from the Southern shore of Loch Tay to Lochan Breaclaich?
- Lochan Breaclaich is at an altitude of 443 metres.
- Loch Tay is at an altitude of 106 metres.
- Foyers pumped storage has a capacity of 300 MW and a head of 179 metres.
If a 12 GWh pumped storage system can be built on the North side of Loch Tay, I can’t see why with a head of 337 metres, one can’t be built on the South side of the Loch.
Was this the original plan?
Water Flows In The Breadalbane Scheme
Looking at the SSE Renewables map of the Great Glen scheme, water flows appear to be as follows.
- Loch an Daimh to Stronuich Reservoir via Cashlie power station
- Loch Lyon to Stronuich Reservoir via Lubreoch power station
- Stronuich Reservoir to Lochay power station
- Loch Ben Lawers to Finlarig power station
- Lochan Breaclaich to Loch Lednock via Lednoch power station
- Loch Lednock to Loch Earn via St. Fillans power station
- Loch Earn to Dalchonzie power station
It seems to be an expensive scheme with lots of tunnels and an underground power station at St. Fillans.
Refurbishing And Repurposing The Breadalbane Scheme
Perhaps as the power stations are now over fifty years old, one simple way to increase the generating capacity of the Breadalbane scheme, might be to selectively replace the turbines, with modern turbines, that can generate electricity more efficiently.
I suspect that SSE Renewables have an ongoing program of improvements and replacements for all of their hydro-electric stations in Scotland. Some turbines at Sloy power station have already been replaced with larger ones.
Adding Pumped Storage To The Breadalbane Scheme
In this list of Scotland’s lochs on Wikipedia, there is a short list of the largest and deepest lochs.
- The first five are Loch Ness, Loch Lomond, Loch Morar, Loch Tay and Loch Awe.
- Loch Ness has the Foyers pumped-storage scheme and others are in development.
- Loch Awe has the Cruachan pumped-storage scheme.
- Loch Lomond has the Sloy pumped-storage scheme in development.
- Loch Morar is used in the Lochaber hydro-electric scheme.
It seems to me, that Loch Tay could support some pumped-storage, just because of its size.
Strathclyde University have identified that Ben Lawers can support 12 GWh on the North side of Loch Tay.
Could a scheme involving Lochan Breaclaich add a similar amount of pumped-storage on the South side of Loch Tay?
I also suspect there are possibilities for adding pumped-storage to and from Stronuich Reservoir.
Conclusion
I believe that Breadalbane is an incomplete scheme and that pumped-storage could convert this scheme into a much more powerful and larger scheme.
There would appear to be two schemes, that could each add around 12 GWh of pumped storage.
One advantage is that the waters of Loch Tay can be used for the lower reservoir.
The Anonymous Widower 