Renewable energy has been an attention of scientists for last few decades around the world. Ocean current is also expected to be a new source of renewable energy and some types of Ocean Current Turbine is developed. For optimum ocean current turbine design, utilizing current velocity information is essential but the fact is that there is little information about current velocity and it is not organized well. Thus, in this study, a method to organize and utilize ocean current information based on power spectral model is proposed. Moreover, observation system for lack of data is considered and in-situ observation is conducted around the Kuroshio watershed area. As a result, fluctuation intensity range is quantified at the observed location and by applying current velocity reproduced from proposed spectral model, numerical simulation for design assessment gets easier. The load on the blade in time domain is estimated as an example and it would be used for the design.
