Hydrodynamic characteristics of distributed offshore floating photovoltaic in waves

• 1、School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
• 2、School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
• 3、Dinghai Ecological Environment Monitoring Station of Zhoushan City, Zhoushan, Zhejiang 316000, China

Abstract：In order to accelerate the development of non-fossil energy construction, adhere to centralized and distributed simultaneously, the development of distributed offshore floating photovoltaic has become a top priority. In the present work, a mesoscale non-reflective numerical wave tank is established based on the DualSPHysics open source codes, the reliability of which is verified by combining the experimental results of the mooring pontoon motion state and the mooring line tension. Taking the distributed offshore floating photovoltaic system as the research object, the original size model is established, and ten photovoltaic panels in the wave propagation direction are arranged in a row. The overall force and motion response of the photovoltaic system structure and the tension variation of the four mooring lines under the wave action of 5 m water depth and various wave elements are analyzed. The results show that the tension of the four mooring lines of the single-row photovoltaic system changes periodically and synchronously, and a good linear relationship with the wave height is observed. The limit wave height is 1.63 m under the condition of ensuring the ultimate force of a single floating body. By analyzing the motion law of multi-row PV system and mooring line tension, it is concluded that the length-width ratio of multi-row PV array should be less than 3.0.

Keywords： numerical wave tank distributed offshore floating photovoltaic DaulSPHysics mooring line hydrodynamic force