Tokyo Electric Power Company and Tokyo University have begun a ´60 million ($523,000) research project to test the feasibility of two designs of turbine floatation platforms suitable for machines located at least ten kilometres offshore. One design envisages a slightly bowed triangular semi-submersible floating platform, 180 metres wide. Turbines would be positioned at each of the platform's corners while cables would tether the platform to a central float to increase stability. The second design looks at constructing a new kind of float for individual turbines that would be tethered to the seabed by cables, in a similar fashion to a design recently announced by Norsk Hydro (Windpower Monthly, January 2005). The turbines would sit above sea level on reinforced concrete floats that would extend beneath the surface to a depth of 80 metres. Using concrete is expected to be cheaper than the traditional steel floats. The research is expected to be completed by March 2007.
Windpower Monthly Events
Senior Renewable Energy Analyst (WindGEMINI Product Lead) DNV GL Bristol (City Centre), City of Bristol