The ¿open-centre¿ turbine, galvanised to prevent corrosion, shortly before its deployment in Canada¿s Bay of Fundy
Photograph: OpenHydro
OpenHydro ring-shaped turbine: the new prince of tides
In a particularly ferocious stretch of Canada’s Bay of Fundy, 30 metres underwater, OpenHydro’s distinctive, ring-shaped, one-megawatt (MW) turbine made history as the first commercial-size tidal device to produce electricity when it was switched on late last year.