Motion response of a novel platform of vertical axis marine current turbine

Some marine current harnessing technology require a platform as the base of the marine current turbine. Several potential locations of marine current energy are in deep water and in a strait with limited width, so a floating platform is required for the system. The design of a floating platform should consider the motion caused by the environmental load such as wave, current, wind. The platform should provide a smooth motion response during the operation. This paper compares the motion response of several platform concepts and proposes a novel platform that accommodates several vertical axis turbines. The method of analysis used in this paper is by comparing the response amplitude operates (RAO). The compared platforms are semi-sub platform, catamaran platform PLAT-1. The proposed 44.93 tones platform will accommodate eight vertical axis turbines with total capacity 23kW and installed in 100-200 m water depth. The maximum ocean current is 2.4 m/s significant wave height 25 years return period is 2.4 m wind speed 4.5-6 m/s. The results show that the new platform has better translational motions such as surge, heave, sway, but has varied results on rotational motions such as roll, pitch, and yaw.