Disused Oil Wells Could Enhance Compressed Air Storage
The title of this post, is the same as that of this article on The Engineer.
This is the sub-heading.
A new study has shown how geothermal energy in abandoned oil and gas wells can boost the efficiency of compressed air energy storage by nearly 10 per cent.
These are the first two paragraphs.
Developed by researchers at Penn State University, the geothermal-assisted compressed air energy storage (GA-CAES) system harnesses the existing infrastructure of abandoned oil and gas wells (AOGWs). Compressed air is pumped into the wells, where geothermal heat raises its temperature and compresses it further. Published in the Journal of Energy Storage, the study showed how geothermal energy could increase round-trip efficiency by 9.5 per cent.
“This improvement in efficiency can be a game changer to justify the economics of compressed-air energy storage projects,” said corresponding author Arash Dahi Taleghani, Professor of Petroleum and Natural Gas Engineering at Penn State.
The Professor also says it could be a “win win situation!”
Trump must have nightmares about stories like this, especially, when the scientists have a name, that labels them as an immigrant.
UK Government Sets 8-Hour Minimum For LDES Cap-And-Floor Sheme
The title of this post, is the sa,e as that of this article on Energy Storage News.
This is the sub-heading.
The UK government has published a Technical Decision Document confirming crucial aspects of its long duration electricity storage (LDES) cap-and-floor scheme, which includes increasing the minimum duration required from six hours to eight
These paragraphs give full details.
The document, released by regulator Ofgem on 11 March, details the final overarching rules and requirements for the scheme as well as how it will be implemented, though significant detail still remains to be worked out.
The scheme will provide a cap-and-floor revenue protection for 20-25 years that will allow all capital costs to be recoverable, and is effectively a subsidy for LDES projects that may not be commercially viable without it. Most energy storage projects being deployed in the UK today are lithium-ion battery energy storage systems (BESS) of somewhere between 1-hour and 3-hour in duration (very occasionally higher).
One of the most significant new details of the scheme is that, following industry feedback, the minimum duration for projects to qualify has been increased from six hours to eight hours of continuous rated power.
The ‘continuous rated power’ aspect prevents shorter duration projects from bidding in a smaller section of their MW capacity in order to act like an 8-hour system.
Another interesting detail pointed out by several commentators is that the cap is a ‘soft’ one, meaning it will allow extra revenue to be shared between developers and consumers. Exact details on the ratio are yet to be determined.
As a Graduate Control Engineer from Liverpool University in the 1960s, I hope that the move from a six to eight hours minimum duration is feasible.
I wasn’t dealing with power systems, but with multi-vessel chemical plants.
These are my thoughts.
The biggest project, I was dealing with a few years later in the 1970s, was the modeling of all the the reservoirs and pipelines by the Water Resoures Board.
As the supply side of the water industry hasn’t had too many issues with the volume of water supplied, I feel that the main modelers must have done a reasonable job.
Six To Eight Hours Of Continuous Operation
The article says this about uprating from six to eight hours of continuous operations.
All the systems that have been proposed for cap-and-floor operation, seem to have some form of physical storage.
- Energy Dome appears to have tents of carbon dioxide.
- Energy Vault uses stacks of heavy weights.
- Form Energy has tanks of rust.
- Gravitricity has huge weights in disued mine shafts.
- Highview Power has large tanks of liquid air.
- Pumped storage hydro has two lakes, that hold water.
- Rheenergise has two large tanks, of a water-based slurry.
So to go from six to eight hours will hopefully just need some more storage.
Highview Power appears to use similar gas tanks to those used to store natural gas or hydrogen.
This image clipped from Highview’s web site, shows large tanks for liquified gas storage.
With tanks like these, which can hold GW-equivalents of liquid air, Highview could be building batteries with storage to rival the smaller pumped storage hydroelectric power stations. They are already talking of 200 MW/2.5 GWh systems, which would have a 12.5 hour continuous rating and would probably need two to three tanks.
Coire Glas Pumped Storage
I’ll use Coire Glas pumped storage hydro electric power station as an example.
As currently planned SSE’s Cioire Glas pumped storage hydroelectric power station is 1.5 GW/30 GWh, so it has a a 20 hour continuous rating.
In The UK’s Pumped Storage Hydroelectricity, I gave a rough estimate of the pumped storage hydroelectricity systems in operation or planed as nearly 11 GW/224GWh.
The Soft Cap
The article says this about a soft cap.
Another interesting detail pointed out by several commentators is that the cap is a ‘soft’ one, meaning it will allow extra revenue to be shared between developers and consumers. Exact details on the ratio are yet to be determined.
I seem to remember that when I was modeling a larger multi-vessel chemical plant at ICI, I was using sharing between vessels, to get the system to operate on a PACE-231R analog computer.
So I suspect a soft cap is possible.
Flytipping At King’s Cross Station
To Emphasise the problems of fly-tipping on the railway, they were showing an art installation at King’s Cross station.
It’s an idea, but will it stop fly-fipping on the eailway?
Ørsted Breaks Ground On Innovative UK Battery Energy Storage System
The title of this post, is the same as that, as this news item from Ørsted.
This is the sub-heading.
Ørsted, a global leader in offshore wind energy, has marked breaking ground for its first large-scale UK battery energy storage system (BESS) with a golden shovel ceremony.
These four paragraphs give more details of the project.
Located alongside Ørsted’s Hornsea 3 Offshore Wind Farm, near Norwich, Norfolk, the system will have a capacity of 600 MWh (and a 300 MW power rating), equivalent to the daily power consumption of 80,000 UK homes.
The golden shovel ceremony officially kicks off the construction phase of the project, known as Iceni after the Norfolk-based warrior tribe of the Roman era. It is expected to be operational by the end of 2026.
Preparatory works are now complete and the Ørsted, Knights Brown and Tesla Iceni team will continue with the remainder of the installation.
When completed, the battery energy storage system will be one of the largest in Europe.
Note.
- The batteries themselves are from Tesla.
- The project was previously known as the Swardeston BESS.
- The project will be located near to the Swardeston substation to the South of Norwich.
- The project doesn’t seem very innovative to me, as it appears to be a BESS built from Tesla batteries.
Like many batteries, it is designed to supply power for two hours.
Centrica Business Solutions Powers Gressingham Foods Into A Sustainable Future
The title of this post, is the same as this press release from Centrica Business Systems.
This is the sub-heading.
Centrica Business Solutions has partnered with luxury poultry supplier, Gressingham Foods, to decarbonise its operation and unlock significant energy savings, with the installation of a 3.27MW solar array
These four paragraphs detail the project, its operation and the thinking it.
The energy solutions company will deliver a 5,100 solar panel array to Gressingham Foods’ main food processing site in Redgrave, Suffolk capable of providing more than a quarter of its total energy requirements – enough energy to power 111 homes.
The project will break ground in March and is expected to be fully operational by September 2025.
Once live, the solar project will accelerate the decarbonisation plans of the famous Gressingham Duck producer, by reducing more than 670 tonnes of carbon in the first year alone. The chosen site for the project is part of the original Gressingham duck farmland on the property – with low agricultural land grading, solar represents a great solution to make sustainable use of the space.
The solar project is part of a flexible Power Purchase Agreement (PPA) that will see Gressingham Foods purchase the energy generated by the solar installation from Centrica Business Solutions over the next 12 years, with no upfront capital cost to Gressingham Foods. During this period, Centrica Business Solutions will own and maintain the solar site, guaranteeing its optimal performance.
I have posted this, as I feel the project is a good example of how this type of business can be partially decarbonised.
Certainly, with my rooftop solar installation, I now have the knowledge to have managed the energy on the stud farm, I owned with my wife, in a more efficient manner.
You Don’t Get Many Eleven Coach Trains
Apart from some Class 390 trains and perhaps a few others, that were built that way, eleven coach trains are fairly unusual in the UK.
So I was surprised to see this image of the 10:00 train from Liverpool Street to Norwich.
Note.
- I wrote about travelling in a pair of four-car Class 755 trains in A Pair Of Class 755 Trains At Liverpool Street Station.
- The normal trains on this route are twelve-car Class 745 trains, so they should fit all the stations.
- Both trains are 100 mph trains and Liverpool Street and Norwich is fully electrified, so this service will be zero-carbon.
It would appear that somebody is up to something.
Newcastle Fans Had Few Trains To London
Yesterday, I felt LNER and Lumo would be cashing in, with Newcastle United playing at Wembley.
The finalists were settled on the 6th of February, so that surely gave Network Rail time to reorganise any engineering works so that LNER and Lumo could be running the maximum number of Newcastle United supporters to London.
Lumo didn’t run at all to London on the Sunday and all LNER trains went via the Stadium of Light.
I would have thought, that Network Rail’s inflexibility cost LNER and Lumo a good publicity opportunity.
Now That’s What I Call A Station!
Newsham station on the Northumberland Line opens on Monday and I was alerted to the design of the station, by this page on the Northumberland Chronicle.
I clipped this drone view of the station from the page.
Note.
- It almost looks like two stations, one for the Northbound line and one for the Southbound.
- There appears to be a by-pass for those not wanting to visit the station.
- There is a traditional step-free bridge with lifts.
- Each half-station appears to have bus stops, car parking, disabled car-parking and a drop-off lane.
- There is a well-marked walking route to bring travellers to the station.
This Google map shows the layout of the station.
To say it’s different is an understatement. But I like it and I can’t wait to jump on a Lumo to go and see it, in all its new reality.
I hope all those connected with the design and architecture have got evening wear, as given the awards they’re going to win, they’ll need them.
Saxmundham Station – 14th March 2025
On Friday, I went to Saxmundham to view the presentation of LionLink.
I took these pictures of Saxmundham station.
Note.
- The trains are two of Greater Anglia’s excellent Class 755 trains.
- The line is double track at Saxmundham station.
- The station building suffered a devastating fire 2018 and has since been rebuilt.
- Access between train and platform is step-free. See the gap fillers in the first two pictures.
- The tracks are crossed by the use of the level-crossing.
- There was a new comfortable and warm waiting room.
- There is a small car park.
- There is an hourly train in both directions to Ipswich and Lowestoft.
The station is in walking distance from the town.
These are my thoughts.
Extra Services
This OpenRailwayMap shows Saxmundham station and the Aldeburgh branch, which also serves the Sizewell power stations.
Note.
- The blue arrow indicates Saxmundham station.
- The yellow track is the East Suffolk Line.
- A disused branch line curves East, to the North of Saxmundham station and then South to the former site of Aldeburgh station.
- Sidings for Sizewell C construction trains will be built along this branch line.
Would it not be a good idea to reinstate the railway to Aldeburgh and run a second hourly train between Aldeburgh and Ipswich?
- There is space for a Platform 0 at Ipswich station.
- There is only the hourly Ipswich and Lowestoft train in both directions on the East Suffolk Line.
- Simple one platform stations would be needed at Leiston, Sizewell, Thorpness and Aldeburgh.
- There is probably enough double track for the extra train.
The current Ipswich and Saxmundham service takes about 34 minutes, so I suspect two trains would be needed for an Ipswich and Aldeburgh shuttle.
In the Wikipedia entry for Aldeburgh station, there is this paragraph.
In 1929 the LNER introduced luxurious Pullman day excursion trips from Liverpool Street to various seaside resorts. The service, known as the Eastern Belle, served Felixstowe on Mondays, Frinton and Walton on Tuesdays, Clacton on Wednesdays and Thorpeness and Aldeburgh on Thursdays and Fridays. The service ended in September 1939 when the Second World War broke out.
Perhaps not a Pullman service, but a kids special in the summer holidays.
Could Bealings Station Be Rebuilt?
Bealings station, which used to be between Westerfield and Woodbridge stations was closed in 1956.
This Google Map shows its location.
The station is now the Mallard House Business Centre.
Silvertown Tunnel Works – 15th March 2025
I did two runs on the Docklands Light Railway past the Silvertown Tunnel Site.
These pictures were taken on the run to City Airport.
And these were taken on the return to Canning Town station.
The tunnel certainly looks to be on course to open on April 7th.
The Anonymous Widower 