The Isik water turbine

The European patent office issued the patent EP3728831A1-(B1) for the ISIK WATER TURBINE. This turbine was designed for application in rivers or streams without any dams.

The Isik water turbine – The concept

In contrast to usual water wheels, the ISIK WATER TURBINE is operated in a fully submerged position. A lifting body which is fixed at the turbine blade lifts the blade so far that the flow can reach into the blade and drive the turbine wheel. 

After transferring the kinetic energy of the flow, the same lifting body forces the blades to retract into the turbine cage. Therefore the blade has only very little flow resistances on its way to the initial position (figure left). If there is an additional hydraulic head existing, the ISIK WATER TURBINE can simultaneously utilize the elevation energy just like an overshot water wheel (figure right).

In order to concentrate the kinetic energy at the upper part of the turbine, it is possible to place a ramp in front of the turbine:

Today, the third generation of the ISIK-Turbine is in planning phase. After several optimizations, we can present the new design:

The 3D-View is demonstrating the dense construction. (For better understanding, the inner blades are not shown.) The generator is attached from the side.

New is also a mechanical blade-opening mechanism which supports the floating mechanism in case of high flow velocities. In this design, a rolling arm is fixed to the side of each blade, which lifts the blade as soon as it hits on a fixed arrester profile. The pressure on the lever by the rotating turbine is opening the blade at any desired, preadjusted moment:

The Isik water turbine – The advantages

The 15 advantages of the ISIK WATER TURBINE compared to other commercially available turbines are:

• Very simple and low-priced production
• Production in large series possible
• Simple installation in the river bed. There is no expensive concrete construction or even a retaining wall necessary
• Due to the simple installation procedure, the turbine is also suitable for a temporary service during a short term electricity need “in the field”
• This turbine can be used in all kind of rivers, in small creeks as well as in big rivers. It is also suitable for ocean currents
• This turbine can be built in all kind of diameters and widths. It can use the whole width of the river or only a part of the river bed
• This turbine functions already at a water depth of only 0.5m. There is no retaining wall necessary. Operation during flood is safe
• Efficient operation at natural river steps
• Quick adaptations and maintenance
• Simple permission procedure
• Short amortization time
• No damage to animals or nature
• Little impact on nature
• Fish passing under the rotor or on the side through a fish channel