The UK’s Pumped Storage Hydroelectricity
This post is a simple list of the UK’s pumped storage hydroelectricity.
- Balliemeanoch – 1500 MW/45 GWh – In Development
- Coire Glas – 1500 MW/30 GWh – Under Construction
- Corrievarkie – 600 MW/14.5 GWh – In Development
- Cruachan – 1000 MW/7.1 GWh – In Operation
- Fearn – 1800 MW/37 GWh – In Development
- Dinorwig – 1800 MW/9.1 GWh – In Operation
- Earba – 900 MW/33 GWh – In Development
- Foyers – 305 MW/10 GWh – In Operation
- Ffestiniog – 360 MW/1.44 GWh – In Operation
- Loch Kemp – 600 MW/9 GWh – In Development
- Loch Sloy – 152.5 MW/25 GWh – In Operation
- Red John – 450 MW/2.8 GWh – Under Construction
Note.
- Cruachan is only 440 MW and is being upgraded.
- The storage capacity at Foyers may be wrong, as I can’t find my original source.
When fully developed the total will be 10969.3 MW/223.94 GWh.
The Economic Case For Hydrogen In Domestic Heating
The title of this post, is the same as that of this article on The Chemical Engineer.
The Wikipedia entry for The Chemical Engineer has this introductory paragraph.
The Chemical Engineer is a monthly chemical engineering technical and news magazine published by the Institution of Chemical Engineers (IChemE). It has technical articles of interest to practitioners and educators, and also addresses current events in world of chemical engineering including research, international business news and government policy as it affects the chemical engineering community. The magazine is sent to all members of the IChemE and is included in the cost of membership. Some parts of the magazine are available free online, including recent news and a series of biographies “Chemical Engineers who Changed the World”, although the core and the archive magazine is available only with a subscription. The online magazine also has freely available podcasts.
It is a source on the Internet, where anything non-scientifically correct will be unlikely to appear.
The article has two introductory sub-headings.
Despite its thermodynamic disadvantages, global energy technology specialist Thomas Brewer believes hydrogen has an economic and efficient role in domestic heating. It forced him to deviate from his usual mantra of ‘efficiency above all else’ to get there, though
The work of decarbonisation by chemical engineers is about how we can cost effectively enable our organisations’ transition away from fossil fuels. This requires foresight. A decision chemical engineers make on a project with a 20-year lifespan will still be operational in 2045, when in most global locations, internal combustion engine (ICE) vehicles will probably be in the minority and grid electricity will be mostly renewable.
This is the first actual paragraph.
It is unsurprising, therefore, that chemical engineers are researching and debating the prospects of the future of energy availability from renewables, and the likely role and cost of hydrogen. There is much public noise surrounding the conversation about heat pumps vs hydrogen for domestic heating. I have noticed how few articles are written from an unbiased perspective, how very few reports talk about the whole solution, and authors avoid quantifying the financial impact of their proposed solution. I couldn’t find an unbiased study with any financial logic, so, I built a model to assess the options, for my own interests. I found the results so intriguing that I wanted to share them.
In other words, let the data do the talking and accept what it tells you.
These are some extracts from the article.
On Curtailment
The article says this on curtailment of wind energy, because you are generating too much.
Efficient electrical energy storage is expensive, which has traditionally led renewable system designers to include curtailment as a part of their design. Curtailment involves oversizing the wind supply to be higher than the grid connection to reduce the need for as much energy storage, and deliberately wasting the occasional electrical excess. The system design becomes an economical balance between oversizing the renewable generation and paying for additional electrical storage. Within the UK grid in 2023, curtailment is a small factor. As electrification and wind power become more mainstream, the financial decision between investing in excess wind vs electrical storage will lead curtailment to become a more significant factor.
Curtailment is to me a practice, that should be consigned to the dustbin of history.
To eliminate it, as much storage as is needed storage must be provided.
Eliminate Naked Flames In The Kitchen
The article says this about eliminating naked gas flames (natural gas or hydrogen) in the kitchen.
Figure 1 shows that the recommended standard of hydrogen gas installation if removing kitchen gas cooking would result in less injuries than the existing natural gas installation if cooking were converted to induction heating. Kitchen leaks are more likely than boiler leaks due to the number of valves and connections, regardless of the gas type. NOx emissions in the home because of naked flames in the kitchen are also of concern to the health of the occupants and hydrogen naked flames have a higher NOx emission than natural gas; another reason to eliminate naked flame cooking.
When I was financing the development of what became the Respimat inhaler, I did my due scientific diligence and found research from a Russell Group University, that naked flames (including smoking) were a cause of asthma, especially in children.
My recommendation is that, at an appropriate time in the near future, you replace your gas cooker with an electric one. My ginger-haired Glaswegian friend, who is a chef, who’s had Michelin stars would recommend an electric induction cooker.
Pumped Storage
The article says this about building more pumped storage.
The pumped storage assumption is based on the SSE proposal for Coire Glas, a 30 GWh £1.5bn storage system in Scotland which will more than double the UK’s current pumped storage capacity. The capital cost of this pumped storage system is about £50/kWh which will be delivered at about 80% efficiency. Pumped storage is a good balance between low cost and high efficiency. However, it requires natural resources. The Mott MacDonald report, Storage cost and technical assumptions for BEIS (Department for Business, Energy and Industrial Strategy) suggests the equivalent of four Coire Glas-scale installations in the UK by 2050. The model optimistically assumes that ten more similar additional Coire Glas-size pumped storage schemes could be installed.
This page on the Strathclyde University web site, gives these GWh figures for the possible amounts of pumped-storage that can be added to existing hydroelectric schemes.
Strathclyde’s total for extra storage is over 500 GWh.
Distributed Batteries
The article says this about distributed batteries.
A distributed battery assumption could be configured with multiple 10 kWh batteries which typically cost about £3,000 installed, near or in homes with a heat pump. This could be coupled with larger battery storage systems like the £30m Chapel Farm 99 MWh battery installation near Luton, commissioned in 2023. The small battery systems at each home are similar to the proposed virtual power plants using electric vehicle battery capacity to help balance the grid. Placing these batteries at locations with grid limitations could reduce the costs of upgrading the grid system. This is a more expensive energy storage scheme than pump storage and for the purposes of the model it is assumed that battery storage schemes are limitless. In both cases cited, the cost is £300/kWh. Battery efficiency varies significantly with temperature, and typically ranges from about 90% to 97%. As the system design needs to be focused on the coldest periods, the model is optimistically assuming 93% efficiency, which would require many of the batteries to be in a heated environment.
New lower-cost alternative batteries are also being developed.
Hydrogen Generation
The article says this about hydrogen generation.
Alternatively, the electricity generated from wind energy could be used in the electrolysis of water to produce hydrogen. While the fully installed electrolysis equipment costs about £2,100/kW, hydrogen storage in specially built cylinders is relatively cheap at about £23/kWh. The model, however, assumes salt mine storage which the US DoE in their report, Grid Energy Storage Technology Cost, calculate at a total system cost for hydrogen of $2/kWh. Electrolysis is the least efficient energy storage option, with a conversion efficiency of 75%, including compression. The waste heat from this conversion loss is useful for industrial heating, or in a district heating system. This has been ignored for simplicity.
Pumped storage, distributed batteries and hydrogen electrolysers distributed all over the UK, will mop up all the spare electricity and release it to heat pumps and for charging cars as necessary.
The hydrogen will be used for heating, to decarbonise difficult-to-decarbonise industries and provide fuel for hydrogen-powered vehicles, railways and shipping.
Curtailment will be a thing of the past.
The UK Offshore Wind Potential
The article says this about the UK offshore wind potential.
The UK government target for wind generation by 2030 is 50 GW. The UK offshore wind potential is reliable and available and has been estimated to be as high as 2,200 GW. There are, however, a few low wind periods that can last for several days.
I am not going to argue with 2,200 GW, but I will say that a lot of that will be used to generate hydrogen offshore.
Conclusions
This is the article’s main conclusion.
A wind-based supply for heating will mean that large quantities of potentially unused electricity will be available for more than 90% of the year, for potentially very low cost. While this could appear wasteful, it provides further synergistical opportunities for the decarbonisation of other interruptible energy duties, such as production of hydrogen for road transport or supplying heat via heat pumps for interruptible industries.
The sensitivity analysis shows that these conclusions are robust even with significant variation in the assumptions on equipment cost, efficiency, and other electricity source options.
This is also said about the most cost-effective solution.
A cost-effective national heat pump-only solution is about £500bn (50%) more expensive than a hydrogen-only boiler solution. The most cost-effective system is a combination of the two, £100bn cheaper than the hydrogen-only solution, and £600bn cheaper than the heat pump-only solution.
A cost-effective national heat pump-only solution has a system efficiency 40% lower than the hydrogen-only solution, requiring more than 750 GW of installed wind capacity. A hydrogen boiler solution requires less than 500 GW but the most efficient system, however, is a combination of the two.
The conclusions mean that everybody will be able to use the most appropriate solution for their circumstances for both heating their housing or powering their vehicles, as there will be massive supplies of affordable electricity and hydrogen.
How Will Everything Be Paid For?
Just as Germany and others built its industry on cheap Russian gas, it will now choose to use the plentiful and reliable UK electricity and hydrogen to rebuild its industry.
Wales Puts Another Pumped Storage Hydroelectric Power Station Into Play
This page on World Energy is entitled Fortune Hydro AG and Voith Acquire 450 MW Dorothea Lakes Pump Storage.
This paragraph introduced the article.
Fortune Hydro AG, in collaboration with Voith Small Hydro, has acquired the 450 MW Dorothea Lakes Pump Storage project as part of an £800 million (US$1 billion) strategic investment in renewable energy in the UK.
It looks to me that this was a good buy in July 2023, as after last week, when I wrote Price Framework Paves Way For Vast Electricity Storage Scheme, in response to a UK Government announcement about funding pumped storage hydroelectricity.
These two paragraphs give more details of the project.
Located in Snowdonia, Northern Wales, this green storage facility presents a unique opportunity to integrate wind, solar and hydroelectric power, Fortune Hydro said. The Dorothea Lakes site was one of the largest slate quarries in Europe and the largest in North Wales.
Electricity produced by solar and wind during low demand can be stored until demand is there. This storage allows balancing of the production cycle in the large solar and wind farms in the north against the demand cycle of consumers and businesses in central and southern UK. It will generate up to 600 jobs and bring economic development and new business opportunities to the local community, the company said.
This map shows the location of Dorothea Lakes.
Note.
- Dorothea Lakes is indicated by the red arrow.
- The Menai Strait between Bangor and Caernarfon is at the top of the map.
- It is certainly in a convenient place, with all the wind farms off the North Wales Coast.
At 450 MW, it’s about a third the size of Electric Mountain, so I suspect it could hold about 3 GWh of electricity.
Price Framework Paves Way For Vast Electricity Storage Scheme
The title of this post, is the same as that of this article on The Times.
This is the sub-heading.
SSE welcomes step forward in plans to build the £1.5bn Coire Glas hydroelectric project
These two paragraphs outline the article.
Ministers have provisionally agreed to a power pricing framework that could pave the way for more pumped storage hydroelectricity projects in Britain, including a gigantic £1.5 billion scheme from SSE that is starting to take shape in the Scottish Highlands.
The Department for Energy Security and Net Zero said it intended to develop a “cap and floor” pricing mechanism that would advance the Coire Glas storage project being developed by SSE, the energy company, and could unlock further pumped storage power stations.
Coire Glas will be one of the largest renewable power projects ever built in the UK.
- It will have a power output of 1.5 GW, which is comparable with some of the large wind farms in the North Sea or four gas-fired power station or Rolls-Royce SMRs.
- It will be able to store 30 GWh of electricity and provide 1.5 GW for twenty hours.
- Coire Glas has a web site.
- Coire Glas will more than double pumped storage hydroelectric capacity in the UK.
Bath County Pumped Storage Station in Virginia, US claims to be the world’s largest battery, but Coire Glas will be able to store more electricity.
You wait decades for one of these monsters to come along in the UK and SSE also have another on the way.
- Loch Sloy hydroelectric power station is the largest conventional hydroelectric power station in the UK.
- It has an output of 152 MW.
- It opened in 1950 and was largely built by German and Italian prisoners-of-war.
SSE plan to convert Loch Sloy power station into a pumped storage hydroelectric power station.
- It will be able to store 25 GWh of electricity.
- Loch Sloy will be the upper lake.
- Loch Lomond will be the lower lake.
- The existing dam, upper lake, pipes and powerhouse will be retained.
- The developments have a web page.
The project is aimed at a commissioning date of 2028.
This paragraph explains how the ‘cap and floor’ mechanism works.
In the scheme, operators would be guaranteed a minimum level of revenue, while consumers would be protected by a price ceiling, above which surplus revenue would be returned to them.
And these two paragraphs give SSE’s reaction.
Finlay McCutcheon, 46, director of onshore Europe at SSE, said the pricing framework was welcome news. He said that a deal for Coire Glas was needed by the end of this year to secure a firm investment decision by early 2026. Planning for the project started in 2007.
“Given the time taken to reach this point, much work is now needed to ensure an effective mechanism is finalised and put in place as early as possible to enable Coire Glas to take final investment decisions and move into construction,” he said.
I believe that the negotiations between the Government and SSE will lead to a monster on Loch Lochy and another one on Loch Lomond.
Conclusion
There are also these pumped storage hydroelectric schemes under development.
- Balliemeanoch Pumped Hydro – 1.5 GW/45 GWh
- Balmacaan Pumped Hydro – 600 MW/15-20 GWh
- Corrievarkie Pumped Hydro – 1.5 GW/14.5 GWh
- Fearna Pumped Hydro – 1.8 GW/37 GWh
- Glenmuckloch Pumped Hydro – 400 MW/1.6 GWh
- Loch Earba Pumped Storage Hydro – 900MW/33 GWh
- Loch Kemp Pumped Storage Hydro – 300MW/9 GWh
- Loch Na Cargeach/Red John Pumped Storage Hydro – 450 MW/2.8 GWh
These total up to 7.4 GW/100+ GWh.
This page on the Strathclyde University web site, gives these GWh 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.
Scotland will be the Saudi Arabia of energy storage.
Statkraft To Acquire Major Loch Ness Pumped Storage Hydro Project From Intelligent Land Investments Group
The title of this post, is the same as that of this press release from Statkraft.
This is the sub-heading.
The acquisition demonstrates Statkraft’s latest commitment to helping Scotland meet its renewable energy targets and strengthening UK energy security
These two paragraphed outline Red John and the deal.
Statkraft, Europe’s largest renewable power generator, has agreed to acquire the Red John Pumped Storage Hydro Scheme, from Intelligent Land Investments Group (ILI).
The 450MW scheme, first conceived in 2015, was granted consent by Scottish Government ministers in June 2021. The acquisition demonstrates Statkraft’s latest commitment to helping Scotland meet its renewable energy targets and strengthening UK energy security.
Note.
I wrote about Red John in Red John Pumped Storage Hydro Project.
I have also found a web site for the project, where this is said.
- The scheme has an output of 450 MW.
- The storage capacity is 2,800 MWh or 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 looks to me, that the ILI Group have done all the hard work in getting the project shovel-ready and are passing the project to a bigger developer.
Building Inside Mountains: Global Demand For Pumped Hydroelectric Storage Soars
The title of this post, is the same as that of this article on Construction-Europe.
This is the sub-heading.
Pumped hydroelectric storage plants around the world have been secretly storing electricity in remote mountain lakes for the last century. But the switch to renewable energy sources is prompting a surge in new construction.
These two paragraphs introduce the article.
Looking out over the ragged beauty of the Scottish Highlands, Coire Glas, a horseshoe-shaped valley holding a clear mountain lake above the shores of Loch Lochy, seems like an unlikely spot to build a megaproject.
In this remote location, surrounded by clumps of pine trees, a team of construction workers from contractor Strabag are tunnelling their way through the rock which they hope will form part of a vast new power storage facility.
The article is a must-read that talks about pumped storage hydroelectricity in general and SSE Renewables’s 1500MW/30 GWh Coire Glas power station in particular.
The Future Of Pumped Hydroelectric Storage
These two paragraphs from the article give a glimpse into the future.
According to the International Energy Agency, global pumped storage capacity is set to expand by 56% to reach more than 270 GW by 2026, with the biggest growth in India and China.
Current pumped storage megaprojects currently in construction include the Kannagawa Hydropower Plant near Minamiaki in Japan which when fully completed in 2032 is expected to have a total installed capacity of 2,820MW; and Snowy Hydro 2.0 in New South Wales, Australia, which is currently expected to complete in 2028.
Note.
- I can count two Indian and ninety Chinese systems under construction. All have a capacity of upwards of one GW.
- The Kannagawa Hydropower Plant appears to be the largest with a capacity of 2.82 GW. The Japanese are keeping quiet about the storage capacity.
- The Snowy Hydro 2.0 has a capacity of 2 GW and a storage capacity of 350 GWh.
- The Wikipedia entry for Snowy Hydro 2.0 states that it is the largest renewable energy project under construction in Australia.
Against this onslaught of massive systems, SSE Renewables are pitching the 1500MW/30 GWh Coire Glas and the 252MW/25 GWh Loch Sloy systems.
Pumped hydroelectric storage will have a big part to play in decarbonising the world. Even in little old and relatively flat UK.
National Grid To Accelerate Up To 20GW Of Grid Connections Across Its Transmission And Distribution Networks
The title of this post, is the same as that of this press release from National Grid.
These four bullet points, act as sub-headings.
- Connection dates of 10GW of battery projects accelerated at transmission level, and 10GW of capacity unlocked at distribution level, both part of the Electricity System Operator (ESO)’s connections five-point plan.
- Battery energy storage projects connecting to the transmission network to be offered new connection dates averaging four years earlier than their current agreement.
- The accelerated 20GW equates to the capacity of six Hinkley Point C nuclear power stations.
- Work is part of ongoing collaborative industry efforts, together with Ofgem and government, to speed up and reform connections.
This is the opening paragraph.
National Grid is accelerating the connection of up to 20GW of clean energy projects to its electricity transmission and distribution networks in England and Wales as part of ongoing collaborative work across industry.
As I write this, the UK is generating 38.5 GW of electricity, so another 20 GW will be a large increase in capacity.
I shall look at what National Grid are proposing in sections.
10 GW Of Battery Power
These two paragraphs, outline the plan for 10 GW of battery power.
On its transmission network, 19 battery energy storage projects worth around 10GW will be offered dates to plug in averaging four years earlier than their current agreement, based on a new approach which removes the need for non-essential engineering works prior to connecting storage.
The new policy is part of National Grid’s connections reform initiative targeting transmission capacity, spearheaded by the ESO – which owns the contractual relationship with connecting projects – and actioned jointly with National Grid Electricity Transmission (ET), the part of the business which designs and builds the transmission infrastructure needed in England and Wales to plug projects in.
It looks to me that someone has been doing some serious mathematical modelling of the UK’s electricity network.
Fifty years ago, I provided the differential equation solving software, that enabled the Water Resources Board to plan, where reservoirs and pipelines were to be built. I have no idea how successful it was, but we don’t seem to have any serious water supply problems, except when there is equipment failures or serious drought.
But modelling water and electrical networks is mathematically similar, with rainfall, pipelines and reservoirs in the water network and power generation, transmission lines and batteries and pumped storage hydroelectricity in the electricity network.
I’d be interesting to know what software was used to solve the mathematical model.
I certainly agree with the solution.
Two of our modern sources of renewable energy; solar and wind are not very predictable, but cost a lot of capital investment to build.
So it is very wrong not to do something positive with any excess electricity generated. And what better place to put it than in a battery, so it can be retrieved later.
The earlier, the batteries come on stream, the earlier, the batteries can save all the excess electricity.
So moving the plug in dates for battery storage four years earlier is a very positive thing to do.
A simple calculation shows that for 10 GW, we would need nineteen batteries of about 526 MW.
Ideally, like power stations, they would be spread around the country.
Could Pumped-Storage Hydroelectricity Be Used?
The largest battery in the UK is the Dinorwig pumped-storage hydroelectric power station, which is commonly known as Electric Mountain or Mynydd Gwefru if you’re Welsh.
- It opened in 1984, after a ten years of construction.
- It has a power output of 1.8 GW.
- The energy storage capacity of the station is around 9.1 GWh.
Roughly, every gigawatt of output is backed up by 5 GWh of storage.
If the proposed nineteen new batteries have the same power to storage ratio as Electric Mountain, then each battery will have a storage capacity of 2.63 GWh
SSE Renewables are planning two large pumped-storage hydroelectric power stations in Scotland.
- Coire Glas – 1.5 GW/30 GWh – Possible completion in 2031.
- Loch Sloy – 152.5 MW/25 GWh – See SSE Unveils Redevelopment Plans For Sloy Hydro-Electric Power Station.
A quick calculation, says we’d need seven pumped-storage hydroelectric power stations, which need a lot of space and a handy mountain.
I don’t think pumped-storage hydroelectric would be feasible.
Could Lithium-Ion Batteries Be Used?
My mathematical jottings have shown we need nineteen batteries with this specification.
- An output of about 526 MW.
- A storage capacity of around 2.63 GWh
This Wikipedia entry gives a list of the world’s largest battery power stations.
The current largest is Vistra Moss Landing battery in California, which has this specification.
- An output of 750 MW.
- A storage capacity of 3 GWh
Reading the Wikipedia entry for Vistra Moss Landing, it appears to have taken five years to construct.
I believe that nineteen lithium-ion batteries could handle National Grid’s need and they could be built in a reasonable time.
Could Any Other Batteries Be Used?
Rounding the battery size, I feel it would be better have twenty batteries with this specification.
- An output of 500 MW.
- A storage capacity of 2.5 GWh
Are there any companies that could produce a battery of that size?
Form Energy
Form Energy are well-backed with an MIT heritage, but their largest proposed battery is only 10 MW/1 GWh.
They could be a possibility, but I feel it’s only a small chance.
Highview Power
Highview Power say this about their next projects on this page of their web site.
Highview Power’s next projects will be located in Scotland and the North East and each will be 200MW/2.5GWh capacity. These will be located on the national transmission network where the wind is being generated and therefore will enable these regions to unleash their untapped renewable energy potential and store excess wind power at scale.
Note.
- This is more like the size.
- Work is now underway at Carrington – a 50MW / 300MWh plant at Trafford Energy Park near Manchester.
- Highview’s technology uses liquid air to store energy and well-proven turbo-machinery.
- Highview have a co-operation agreement with Ørsted
They are a definite possibility.
10 GW Of Extra Unlocked Capacity
These two paragraphs, outline the plan for 10 GW of extra unlocked capacity.
On its distribution network in the Midlands, South West of England and South Wales, the additional 10GW of unlocked capacity announced recently is set to accelerate the connection of scores of low carbon technology projects, bringing forward some ‘shovel ready’ schemes by up to five years.
National Grid has already been in contact with more than 200 projects interested in fast tracking their distribution connection dates in the first wave of the capacity release, with 16 expressing an interest in connecting in the next 12 months and another 180 looking to connect within two to five years.
This page from National Grid ESO, lists the actions that were taken to release the extra grid capacity.
Conclusion
This looks to be a very good plan from National Grid.
Arup and ILF Join Forces To Enhance Pumped Storage Projects In The UK
The title of this post, is the same as that of this of article on Water Power And Dam Construction.
These are the first two paragraphs.
Global sustainable development consultancy Arup and ILF Consulting Engineers have recently signed a Memorandum of Understanding (MOU) aimed at strengthening pumped storage projects in the UK. These projects include Coire Glas, Glenmuckloch, and up to 13 additional schemes in the pipeline.
This partnership marks a significant development in the hydropower sector in the UK, bringing both capacity and valuable experience to support the country’s net-zero energy transition.
Fifteen schemes could be a lot of energy storage.
These are a few useful web sites with information to back up the article.
As most of the work appears to be in Scotland, this would appear to be a second large installment of Power From The Glens. Perhaps it should be named Storage In The Glens.
Scotland’s 25 GWh Energy Storage Arriving By Stealth
In SSE Unveils Redevelopment Plans For Sloy Hydro-Electric Power Station, I introduced SSE Renewable’s plan to convert the UK’s largest hydro-electric power station into a pumped storage hydroelectric station, that can store 25 GWh of electricity and generate 152.5 MW of electricity.
After a public consultation in July, which unfortunately, I was unable to get to, SSE have now published a comprehensive document, which details their plans.
These are some points from the document.
- There will be no increase in the generating capacity of 152.5 MW, which is about half the size of a gas-fired power station.
- SSE designed a similar scheme for Sloy in 2009.
- Pumped storage systems need a lot of water. The Loch Sloy scheme has Loch Lomond.
- The development of pumped storage at Sloy would only require construction work to be carried out in the grounds of the existing power station.
- No permanent new works would be required at Sloy Dam or outside of the existing station boundary.
- A new above ground structure would be required which would contain a main hall with vehicular access, laydown areas, an overhead travelling crane, electrical switchgear and control systems.
- A new underground pump hall would be required to house two pumps. This would link to the intake structure and would be approximately 20m below the existing ground level.
- The existing tailrace to Loch Lomond, will be used to bring water to the pumps.
- Construction could start in 2025, with completion in 2027.
This redevelopment is a much less complex construction project, than building the original power station in the 1950s.
It also looks like the construction will not cause much disruption in the local area.
Hence my view, that this storage is arriving by stealth and won’t be noticed by those passing the power station.
After reading this SSE document, I wonder how many similar 1950s hydroelectric power stations have been upgraded to pumped storage stations in the last few years.
Also, if their Sloy scheme is successful, will SSE be looking for other hydroelectric power stations to convert to pumped storage?
This article on renews.biz is entitled Vattenfall Plans To Build 730MW Of Swedish Hydro Power, where this is a paragraph.
Vattenfall is also conducting a pilot study to investigate reinstating the Juktan power station on the Storjuktan lake adjacent to the Umeälven river in Västerbotten, to a pumped storage plant with a capacity of up to 380MW.
Note.
- Juktan power station was built as a pumped storage station and converted to a standard one.
- It has a web page.
- As the paragraph says it could be converted back!
So other companies and countries are thinking the same way!
Strathclyde University’s Prediction
This page on the Strathclyde University web site, gives these figures in GWh 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.
These figures must give SSE food for thought.
These new schemes are also being planned.
- Balliemeanoch – 1.5GW/45 GWh
- Coire Glas – 1.5 GW/30 GWh
- Corrievarkie – 600 MW/14.5 GWh
- Fearna – 1.8 GW/37 GWh
- Loch Earba – 900 MW/33 GWh
- Loch Kemp – 300 MW/9 GWh
- Loch Na Cathrach/Red John – 450 MW/2.8 GWh
These could bring the potential pumped storage in Scotland to 685.3 GWh.
ILI Group To Develop 1.5GW Pumped Storage Hydro Project
The title of this post, is the same as that of this article on the Solar Power Portal.
This is the sub-heading.
The pumped hydro facility will be located at Loch Awe, which is also home to Kilchurn Castle.
These paragraphs outline the story.
Clean energy developer ILI Group has begun the initial planning phase for a new pumped storage hydro project in Scotland.
The Balliemeanoch project at Loch Awe, Dalmally in Argyll and Bute will be able to supply 1.5GW of power for up to 30 hours. It is the third and largest of ILI’s pumped storage hydro projects, with the other two being Red John at Loch Ness and Corrievarkie at Loch Ericht.
The Balliemeanoch project will create a new ‘head pond’ in the hills above Loch Awe capable of holding 58 million cubic meters of water when full.
Note.
- At 1.5 GW/45 GWh, it is a large scheme and probably the largest in the UK.
- This is the third massive pumped storage hydro scheme for the Highlands of Scotland after SSE’s 1.5 GW/30 GWh Coire Glas and 152 MW/25 GWh Loch Sloy schemes.
- I describe the scheme in more detail in ILI Group To Develop 1.5GW Pumped Storage Hydro Project.
The article also has this paragraph.
It follows a KPMG report finding that a cap and floor mechanism would be the most beneficial solution for supporting long duration energy storage, reducing risks for investors while at the same time encouraging operators of new storage facilities to respond to system needs, helping National Grid ESO to maintain security of supply.
A decision on funding would be helpful to all the energy storage industry.
The Anonymous Widower 