The Anonymous Widower

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.


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.

March 1, 2022 Posted by | Energy, Energy Storage | , , , , , , , | 3 Comments

UK To France Automotive Train Service Launched

The title of this post, is the same as that of this article on Railway Gazette.

This is the introductory paragraph.

DB Cargo UK has launched a rail service transporting Corolla hybrid cars manufactured at Toyota’s Derby plant in the UK to Valenciennes in France via the Channel Tunnel, returning with Aygo, Yaris and Yaris+ vehicles.

It sounds very sensible and efficient, as the trains seem full both ways.

March 1, 2022 Posted by | Transport/Travel | , | 11 Comments

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.


  1. Loch Awe, which is the sixth biggest freshwater loch in Scotland, is in the North-East corner.
  2. Loch Fyne, which is the longest sea loch in Scotland, is in the South-West corner.
  3. Loch Lomond, which is the second biggest freshwater loch in Scotland, is in the South-East corner.
  4. 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.


  1. Loch Nant is in the Western side of the map.
  2. Nant power station is marked by the red arrow.
  3. The loch to the South of the power station is Loch Awe.
  4. It appears that water can also go from Loch Nant to Inverawe power station to the North-East of the loch.
  5. Inverawe power station is on Loch Awe, which curves round Loch Nant.
  6. 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.


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.


March 1, 2022 Posted by | Energy, Energy Storage | , , , , , , , , , , , , | 1 Comment

Worried For Clive

On a bus on Saturday, I sat next to a lady of about my age and we got talking about Russia’s illegal attack on Ukraine.

We then started talking about BBC’s news correspondent in Ukraine; Clive Myrie.

We were both worried about Clive.

This article on the BBC is entitled Racism In Russia: Stories Of Prejudice and it details a stories of a black student and others in the country. I also remember, when I went to see Ipswich play in Moscow, that a black fan told me he had been abused on the Moscow Metro.

I do wonder that if Kyiv falls, that Clive will not have an easy time.

Let’s hope Clive was born lucky!

March 1, 2022 Posted by | World | , , , , , , | 4 Comments