Session: 09-01-01 Installation, Marine Operations and Maintenance - 1

Paper Number: 78964

78964 - Installation Potential of Very Large Floating Offshore Wind Turbines in Japan 

In Europe and Japan, various types of floating wind farms are being constructed. In recent years, the size of wind turbines has been increasing, and the floating structures have also been getting larger. The types of floating structures are generally classified into semi-submersible, Spar, and barge types. The advantages and disadvantages of each type of floating structure can be depending on the construction cost, response characteristics in wind and waves, and water depth (depending on the draft of the floating structure). The semi-submersible type is generally more expensive to build but has a smaller installation depth and a larger installation area, while the Spar type is less expensive to build than the semi-submersible type but has a larger draft and a limited installation area. For the construction of Spar type floating structure, deep and calm waters, like fjord are necessary and for the installation, deep waters are also necessary. However, it is said that such area is not so large near Japanese shore. In this study, the installation potential of each type of floating structure in the vicinity of Japan was estimated by using GIS (Geographic Information System) software based on the results of the basic design of floating structures, assuming the installation of large (10MW to 20MW) wind turbines.

Presenting Author: Toshiki Chujo National maritime Research Institute

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