Installation Potential of Floating Offshore Wind Turbines with Very Large Turbines Around Japan

In Europe and Japan, various types of floating wind farms are being constructed. recent years, the size turbines has been increasing, structures have also getting larger. The generally classified into a semi-submersible, spar, barge types. advantages disadvantages each type depending on construction cost, response characteristics in waves, water depth (depending draft structure). semi-submersible is more expensive to build but smaller installation larger area, while spar less than limited area. For structure, deep calm waters, like fjord necessary for installation, waters necessary. However, it said that such area not so large near Japanese shore. this study, potential 2 structure vicinity Japan was estimated by using GIS (Geographic Information System) software based results basic design structures, assuming (10 MW 20 MW) turbines. author clarified FOWTs one Spar shallow enough achieve Government's target. 1st step strategy goal with 50 ~ 100 m depth. Furthermore, effect sharing anchor system estimated, show cost reduction about twice normal moorings, turbine arrangement.