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.
Ministerial Roundtable Seeks To Unlock Investment In UK Energy Storage
The title of this post, is the same as that of this press release from Drax.
These are the first two paragraphs.
Business leaders have met with UK Energy Minister the Rt Hon Greg Hands MP to discuss how the government could unlock significant investment in vital energy storage technologies needed to decarbonise the power sector and help ensure greater energy independence.
The meeting was organised by the Long-Duration Electricity Storage Alliance, a new association of companies, progressing plans across a range of technologies to be first of their kind to be developed in the UK for decades.
This press release, which I found on the Drax website, has obviously been produced by the four companies; Drax, Highview Power, Invinity Energy Systems and SSE Renewables.
Greg Hands MP, who is the Minister of State for Business, Energy and Clean Growth said this.
The Long-Duration Electricity Storage Alliance is a key part of our plan to get the full benefit from our world-class renewables sector. Government have already committed £68 million of funding toward the development of these technologies.
“This will support the UK as we shift towards domestically-produced renewable energy that will boost our energy security and create jobs and investment.
The three CEOs and a director from SSE, make statements about what they are doing and what they need from Government, which are all worth reading.
- Drax still needs planning permission for its flagship project at Cruachan, that is called Cruachan 2.
- SSE are saying that the massive 30 GWh Coire Glas pumped hydro scheme has full planning permission and is shovel-ready.
- Drax and SSE appear to be in favour of Cap and Floor regimes to support long term energy storage.
- Highview Power and Invinity Energy Systems appear very optimistic.
- Finance for capital cost is not mentioned. As billions will be needed for some of these schemes and the returns are very predictable, I assume that it has been promised.
After reading this press release fully, I too am optimistic.
Conclusion
I feel sure, that a sensible plan will evolve fairly soon, which will involve these four companies and possibly some others.
A Rusting Battery In Minnesota Could Unlock The Electric Grid Of The Future
The title of this post is the same as that of this article on the West Central Tribune.
This is the first paragraph.
A pilot project between Minnesota’s second largest supplier of electricity, Great River Energy, and a Massachusetts start-up claims to have a breakthrough in battery technology that would allow for vast expansions of renewable energy on the power grid.
The article goes on to describe Form Energy’s batteries and gives a couple of pictures.
I’m not sure, but it looks like the battery can supply 1 MW for a hundred hours.
Form Energy have impressive backers and have been secretive in the past, but the concept of using iron oxide (rust) as an energy storage medium sounds to me, to be a challenging idea.
A Resilient Net Zero Electricity System Achievable By 2035 But Increased Investment Required, Regen Report Finds
The title of this post, is the same as that of this article on Current News.
This is the first two paragraphs.
The technical solutions needed to operate a net zero electricity system by 2035 are available or attainable, Regen has found, though a step-change in the level of investment is still needed.
The trade body has produced a new report for National Grid ESO into a ‘day in the life’ of a fully decarbonized electricity system by 2035, which the ESO is aiming for.
The article gives a lot of figures about our electricity supply in 2035.
Consumption of electricity will be between 450 and 500TWh per year, with the following sources.
- 55-65GW of offshore wind
- 25-35GW onshore wind
- 40-50GW of solar
- 6-10GW of other renewables
- 10-15GW of low carbon dispatch
- 8-10GW of nuclear
- 8-12GW of carbon capture and storage (CCS)
- 15-25GW of fossil fuel backup.
Note.
- 450-500 TWh is 51-57 GW per hour averaged out over the year.
- They emphasise the importance of energy storage.
- No mention is made of the massive Coire Glas pumped hydro storage.
- No mention is made of hydrogen.
- As is normal, with reports like this the authors don’t keep their GW and GWh separate.
- They also don’t explain the hierarchy of MW, GW and TW, which is 1000 x steps up the scale.
The full report is at this page on the Internet.
Gelion Claims Zinc-Bromine Gel Batteries Will Replace Lithium-Ion
The title of this post, is the same as that as this article on RideApart.
These are the first two paragraphs.
Battery technologies are evolving at a rapid pace—and for good reasons. With the automotive world moving toward electrification, companies need to find solutions for producing electric vehicles on a massive scale. While lithium-ion battery technology rules the roost today, that isn’t stopping firms from developing the next big leap forward.
From solid-state power units to structural batteries to sci-fi-worthy quantum batteries, there’s no shortage of ideas and concepts. However, the Australian company Gelion Technologies believes it found a more affordable and durable approach with its zinc-bromine gel battery. Unlike lithium-ion units, the material found in Gelion’s design isn’t rare, expensive, or potentially flammable.
It’s yet another development coming out of Australia.
Gore Street Energy Storage Fund Seals ‘Landmark’ Acquisition In Germany
The title of this post, is the same as that of this article on Proactive Investors.
This is the first paragraph.
“This is a landmark acquisition with compelling fundamentals which not only demonstrates our entry into new markets but also increases our operational cash generating assets, and further diversifies Gore Street’s portfolio.”
I would assume that this is a quote from someone at Gore Street.
A more engineering approach is taken in this article on Renewsables Now, which is entitled Gore Street Buys 90% Stake In 22-MW/28-MWh Battery In Germany.
Gore Street Energy Storage Fund certainly have ambition.
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.
The Anonymous Widower 