Archimedes Helix on a River for Energy Production

I am interested in installing the Archimedes Helixes in a river with a smooth flow of water with a current of 10 m³/s. The river has a small inclination and the flow is smooth. I need a system designed for producing electric energy. My studies show that a flywheel is an essential component for the stability of the system. There are claims that generators attached to helices are efficient.  How can the Archimedes Helix best be set up on a river to produce energy? What are your experiences?  I am also interested in companies that produce the devices in order to buy and install them.