We have been working to develop the design requirements for tidal turbines where the tidal flow velocity is low. This needs blades which are easy and cheap to manufacture and opens up a larger range of coastal sites where tidal energy can be harvested. See our new paper for more details:
Structural Performance of Composite Tidal Turbine Blades, Hassan Gonabadi, Adrian Oila, Arti Yadav, and Steve Bull, Composite Structures, 278 (2021)114679.https://doi.org/10.1016/j.compstruct.2021.114679