November 2012: The National Trust started London’s first ever Archimedes Screw hydroelectric turbine at Morden Hall Park in south west London sited on the river Wandle. Local MP for Kingston and Surbiton, Ed Davey – who is handily also the Secretary of State at DECC – was in attendance at the launch event. The National Trust’s news release adds that the “Archimedes Screw turbine will generate enough electricity to power the Park’s new award-winning visitor centre. By acting like a modern waterwheel it will harness the power of the river to generate electricity. It is estimated that it will generate 59,000 kWh a year – enough for about 16 average households.” The 8.5kWe turbine had a high capital cost – reported at £350,000 fully installed – and much debate about how this cost should be viewed is presented on the following Guardian article (ie high capital cost, but very low ongoing costs for the generator over its life span).
Further details on the project are posted on the Morden Hall Park blog and information on the Archimedes Screw itself on the website of the technology provider for this installation, Halliday’s Hydropower.