The aim of the Renewable Heritage Trust is to restore interesting old buildings, giving them new use of generating renewable energy. The gravitational energy in the water falling over the weir is converted into electrical energy via the fully restored waterwheel and the first Archimedes Screw turbine to be installed in the UK. The flow of water turns the wheel and screw, which each run a generator via a gearbox. The output of electricity is determined by the flow of water and head i.e. the height of the fall over the weir, so is dependent on the river level. Maximum output is 30 kW, enough for the average need of about 50 houses. Most of the electricity is exported to the National Grid and income from its sale funds the running costs of the project. 

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