Community Hydropower at Ludford Mill

Ludford Mill hydropower scheme is a community investment project which will supply hydropower for local households with excess power supplied to the grid. The Ludlow Hydro Co-operative made the decision to harness the river Teme for Ludlow by bringing the 17th Century listed Ludford Mill back to life by installing  a state-of-the art Archimedean Screw hydropower turbine, cunningly designed to fit in with the current buildings. Installed at a 17th Century listed mill and horseshoe weir on the Teme the semi compact Archimedean Screw hydropower turbine with a maximun power output of 29kW and an estimated annual output of 170,000kWh will save 73 tonnes of CO2 annually.

Artists impression of Ludford Mill hydropower scheme

Artists impression of Ludford Mill hydropower scheme

The Archimedean Screw is contained inside an enclosure which is built to complement the structure of the existing buildings, and the screw itself will not be visible. The enclosure will also provide sound insulation so that noise levels will be kept very low.

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The scheme was designed by Mannpower Consulting Ltd and the civil engineering work began on the hydro turbine in the second week in August 2015 and the schedule was that by the second week in October the main enclosure walls would be complete, with stop logs top and bottom, which would allow the removal of the temporary cofferdam and retreat out of the river itself.

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Over the next few months between October and January preparations were put in place to build the pump house for the electrical control gear, sluice gates, screens and walkways were installed and electrical cables and hydraulic lines were in place for the arrival of the turbine.

Ludford Mill

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Then 30kW Archimedean Screw hydropower turbine designed by Landustrie arrived on site in March and was commissioned by Mannpower and Eco Evolution in April.

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Once again we see the Ancient power of Archimedes being used for hydropower generation because if it’s fish-friendly credentials. The Archimedean Screw turbine provides a fish-friendly alternative to conventional turbines, ideally suited to low-head (1m-10m) sites, and sites with fish protection issues. Extensive fish passage tests have conclusively demonstrated that the large water chambers and slow rotation of the Archimedean Screw allow fish of all sizes, and debris, safe passage through the turbine. As a result, the Environment Agency has agreed that no screening is required.

If you are the owner of an old mill site or a potential hydro site or are a community group interested in developing a hydro project for community use please contact us here.

 

 

Donside Community Archimedean Screw Hydropower Scheme

The Hydro scheme is located in Donside Village in Tillydrone, on the banks of the River Don. The Village is a relatively new, sustainable community based on the site of an old papermill. The hydro scheme will use the existing mill lade with the addition of a 100kW Archimedes screw. Donside Community Hydro plan to raise the money to build the scheme via a community share offer. Aberdeen Community Energy says Donside Hydro will generate £30,000 every year for community initiatives.

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Photo Credit: Highland Eco-Design

The scheme which is at design stage will generate enough electricity to power 122 households.

System Elements

Available head 1.75m
Max. flow rate 10,000 l/s
Screw bladed length 5.61m
100kW Archimedes Screw
Screw weight 20 tonnes

The proposed Donside hydropower scheme

The proposed Donside hydropower scheme

Community Benefits

Aberdeen Community Energy (Ace), a community benefit society set up by members of the Donside Community Association (DCA), will be launching a community share offer over the next few weeks to back the Donside Hydropower scheme.

The proposed hydropoweer scheme will draw water from the River Don to create renewable electricity that will be sold to the national grid. Surplus profits from the initiative will be channelled into a community fund that will be used to achieve social and environmental benefits for local, deprived communities. Ace together with their partners at the DCA have been working towards launching the scheme for the past three years and are finally in a position where they can share the project with the world, and open it up to investment.
The Donside Hydropower scheme will help Scotland on its journey towards 100% renewable electricity by 2020, and it will also create a sustainable community that truly works for its inhabitants and riverside setting. Aberdeen Community Energy are already working closely with members of the Donside and Tillydrone areas to identify priorities for the community fund, with their immediate focus being on improving the riverside for public use. They are also looking at the longer term outcomes, and have set up a social enterprise called Sinergy that will route surplus income into projects that will deliver sustainable benefits for the wider area.

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With construction planned for late May 2016, Ace said potential investors in the scheme could expect an “ethical, low-risk investment opportunity” delivering around a 5% return on their investment. Ace, which has so far raised around £150,000 from loans, grants and investment from Ace directors, is also seeking conversations with businesses or individuals who may be interested in supporting the initiative financially in the short term, as either a lender or investor.
The community share offer will be available for investment from April 2016. A launch event will take place at an Aberdeen city centre location in the weeks after the share offer is live.

Archimedes arrives at Osney Lock!

Osney Lock Hydro is the first community-owned hydro scheme to be built on the Thames.

Constructing a community-owned hydro scheme at Osney Lock has been a dream for local residents for over thirteen years. It started in 2001 with a survey of  Osney Island residents that revealed a shared concern about climate change and a desire to harness the power of the river that ran around the island to generate green electricity. A small island next to Osney Lock was identified as the best site for the hydro scheme. The island is owned by the Environment Agency so they were approached about the possibility of leasing the site. It was discovered that work was to begin on the weir in 2013 so the pressure was on for the residents to draw up plans for the Archimedean Screw and secure planning permission and then most importantly secure funding for the project.

Construction work prior to installation

Construction work prior to installation

There was extraordinary support shown by local people towards the project. The Osney Lock Hydro share offer raised over £500,000 in just four weeks. Without this swift and significant support the project would not have been able to go ahead. Over 40% of the investment came from within a mile of the project and 4 out of 5 investors live in Oxfordshire.

Osney Lock hydro installation

Lifting the 4.35m Archimedean Screw into place

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On Tuesday 25th March at midday the dreams of the local residents came to life when a 4.35m-long, four-bladed Archimedean screw was installed at Osney Lock – the final construction phase of the Osney Lock Hydro scheme. The screw was designed by Mann Power Consulting Limited in the UK and manufactured in the Netherlands by Landustrie. Once operational, the 49kW variable speed Archimedean Screw turbine  will harness the power of the river to generate approximately 179,000kWh of green electricity per year.  When the scheme is completed it will generate enough electricity equivalent to that used to power around 60 houses. It will also generate an income of over £2 million over the lifespan of the project for the community to use for further environmental projects in the community.

Osney lock hydro installation

The four bladed Archimedean Screw being guided into position ~ Photo Credit: Andrew Watson

Over the coming weeks the power house will be constructed and then the gearbox and generator added. Once the Archimedean Screw is commissioned it will generate clean green elcetricity for the Osney Lock community – a long awaited dream that came to life 🙂

Update: Gear box and generator connected.

Gearbox and generator connected

Gearbox and generator connected