Offshore Renewable Energy Research Group
Our group is conducting technological development, safety evaluation, and actual sea measurement for floating offshore wind turbines, wave energy converters, and marine current energy converters in order to promote the use of renewable energy existing in the ocean around Japan. In addition, the study on design conditions using ocean wave and current estimation data, and investigation on ocean energy volume are also conducted.
Main Research Topics
- Fundamental and Supportive Technology Developments for Offshore Renewable Energy
- Optimum Blade Pitch Angle Control for Floating Offshore Wind Turbines
- Automatic and Optimum Control for Wave Energy Converters
- Standardization of Safety on Offshore Renewable Energy Facilities and Devices
Overview of Researches
Researches and developments on offshore wind turbine/floating body coupled behavior analysis, optimization of blade pitch control, structural monitoring, collision and drift risk assessments in wind power generation farms, and assessment of underwater transmission cable behavior are conducted in our study. Moreover, the developments of tank testing techniques and actual sea measurement technology are promoted.
Fig.1 Floating wind turbine model in the Ocean engineering basin
In order to realize the design limit and avoid breakdowns of the structure or mooring lines of floating wave energy converters, experiments with operating load conditions and mooring lines setting in modeled real situations are carried out in the test basin in our institute.
Fig. 2 Floating point absorber type wave energy converter model in the towing tank
Fig.3 Attenuator type wave energy converter model in the towing tank