This is accomplished in two steps:
Firstly: an incoming wave crest increases the inlet chamber’s water level. Simultaneously, water is partly directed from the inlet to the outlet through a hydro-turbine set within the hull.
Secondly: as the wave crest passes inward and the water level outside falls with the incoming trough, so do the levels in both the chambers of the device, leading to a flow from the inlet chamber to the outlet chamber via the turbine, followed by flow from the outlet chamber to the outside environment.
Drakoo-B models also work in floating mode, which has been verified repeatedly in sea trials of prototypes. In floating mode, as in fixed, their modular design enables the construction of large scale arrays in which the units are connected to each other using the company’s proprietary Rigid Pontoon Connectors (RPC) or by simply welding them together. These self-buoyant devices can float on their own or be tethered to existing floating structures such as floating wind turbines, semi-submersibles, floating jetties and floating breakwaters. Additionally, they can also be integrated with offshore production platforms or ships, to power those installations. In areas prone to large tidal changes, Drakoo-B models work more efficiently in floating mode which enables the device to maintain a constant draft.