The Elléo Hydro Screw
Screw turbines have many advantages over conventional turbines : Maximum hydraulic head : 10m Maximum flow rate : 10m3/sec Maximum power output : 400kW On a concrete trough Self-supporting Less civil engineering, quick on-site installation Series-mounted screws Parallel-mounted screw Stainless steel has high corrosion resistance properties and withstands temperature variations. Unlike painted steel screws, which must be disassembled and repainted every 10 years or so, stainless-steel-coated screws require no maintenance. Recommended for schemes subjected to periods of low flow. When the available water is insufficient to allow the scheme to operate under full load, the flow moving through the screw turbine must be limited. At a fixed speed, the only choice is to lower the screw turbine's fill level by closing the sluice. This will reduce the available head and thus the power output. Variable speed is a more efficient alternative in such cases. By means of a variable frequency drive, the screw's rotational speed directly adjusts the flow rate passing through the screw. The screw fill level, and thus the head, are maintained under any hydrological conditions. Production is optimised and profitability is maximised. Variable speed also offers other advantages. By optimising the filling of pockets of water and reducing the rotational speed, the scheme operates at lower noise levels and fish pass through it unharmed. A conventional remote-management system (email and/or smartphone alerts, remote monitoring of electricity generation, etc.) is available for all our hydro screw schemes. In such case we suggest retrofitting existing RMS's with a camera to allow you to monitor your screw-turbine system in real time and, more importantly, start it up safely and remotely. Acquiring a microhydro screw turbine is comparable to investing in property. Example of 50 kW scheme installed on a river: variable flow Example of a 50 kW scheme installed on a canal: constant flow Our microhydro screw turbines are manufactured at our site in Guebwiller, France.
. allow fish to pass unharmed during downstream migration
. no fine screens or bar screens
. robust and long lasting
. little maintenance
. high output
. positive impact on aquatic environments: water aeration
For higher head applications
For higher flow ratesStainless steel coating
Stainless steel screws are robust and built to last.Variable speed
CCTV monitoring
The income generated by your scheme ensures a quick return on investment.
Equivalent of 219 days of generation at full capacity
Equivalent of 343 days of generation at full capacity