The UK’s first carbon neutral marina has taken a step forward with the installation of a energy generating hydro screw.
Pridewater Estates said that it would become the UK’s first completely carbon neutral marina and caravan site organisation.
To minimise its environmental footprint, it said that it had installed an Archimedes screw as an energy generator. The screw works by water falling naturally over a cascade, rotating the screw, which moves a turbine and generates electricity, it said.
While it said that it was not feasible to install a hydro screw at each of its four marina locations, the company has built one screw which it said would produce enough energy to not only offset all four marinas but also provide a surplus which could be fed back into the National Grid.
The screw has been installed in the Thames-side town of Sonning, Berkshire. The design and build has been carried out by contractor Greenford which has also installed screws at Blenheim Palace and the listed Mapledurham Watermill.
It said that the 25t Archimedes screw, which is 4.2m in diameter and has a flow rate of 8,000l/s, would drive a 99kW generator. This it said would produce approximately 730,000kWh per year – almost double the 440,000kWh per year used by its four marinas and caravan sites combined.
Pridewater Estates co-owner Robert Hutton said, “Reviewing the ever increasing electricity running costs at our four marinas, coupled with an unexpected opportunity to acquire a suitable site on the Thames, led us to the decision to make this significant investment.
“We believe Pridewater Estates will be the first carbon neutral canal marina and caravan site operator in Great Britain and we will be able to play our own small part in tackling global warming and promoting green solutions to power generation.”
Pridewater Estates owns and operates four canal marinas and caravan sites which are spread across the UK from near to Leighton Buzzard in the south, to New Mills in Derbyshire’s High Peak, with another near Lichfield, and one on the outskirts of Tamworth. It said that the combined berthing capability of the marinas currently sits at over 300 boats.