Hydro Turbine Screw
The Spaans Babcock Screw Turbine is probably the most efficient technology for low head hydropower sites. Unique is the fish friendliness, long lifetime and minimal operating costs. Spaans Babcock offers grid connected, off-grid and hybrid systems. The Screw Turbine is a further development of the Screw Pump. Whereas the Screw Pump pumps the water up, in the Screw Turbine the water flows down. The Turbine rotates due to the flow of the water and energy is transferred to the drive unit. The generated energy is transformed by a generator into electricity. A single Screw Turbine can produce up to around 500 kW and a number of Screw Turbines can be placed parallel or in series. Project sizes typically vary between 50 and 2000 kW. Spaans Babcock can offer the full solution, including gates, screens, remote monitoring and control, and after-sales and spares supply.
The efficiency curve shows a flat and high efficiency over a wide range of the capacity
The Screw Turbine does not need any grease pump for lubrication of the bottom bearing (This improves the efficiency and lowers the operational costs) and also optimal design of the Turbine and control system helps to minimise or eliminate noise generation
Several tests have demonstrated the fish friendliness of the Screw Turbine and Screw Pump (The Screw Pump can also be used as a fish ladder by pumping the fish)
The Screw Turbine is especially suitable for low heads, already starting from 1 m. This may go up to 12 m for a single stage, or 24 m for a two stage installation.
The power production is up to 500 kW per Screw Turbine and extended by multiple screws easy to > 2MW per site
- Max head (m)12
- Power (kW)500
- Min head (m)1