The elléo Hydro Screw

The elléo Hydro Screw : advantages

Our microhydro screw turbines are manufactured in France.

Screw turbines have many advantages over conventional turbines :
. 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


The elléo Hydro Screw : components



The elléo Hydro Screw : range

Maximum hydraulic head : 10m       Maximum flow rate : 10m3/sec      Maximum power output : 400kW

On a concrete trough


Less civil engineering, quick on-site installation

Series-mounted screws
For higher head applications

Parallel-mounted screw
For higher flow rates


The elléo Hydro Screw : options

Stainless steel coating

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.
Stainless steel screws are robust and built to last.


Variable speed

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.


CCTV monitoring

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.


The elléo Hydro Screw : ROI

Acquiring a microhydro screw turbine is comparable to investing in property.
The income generated by your scheme ensures a quick return on investment.


Example of 50 kW scheme installed on a river: variable flow
Equivalent of 219 days of generation at full capacity




Example of a 50 kW scheme installed on a canal: constant flow
Equivalent of 343 days of generation at full capacity