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Optimization of a multi-pendulum wave energy converter

In order to improve the energy capture efficiency of a multi-pendulum wave energy converter, a mathematical model of the pendulum structure has been built. The final structure parameters of the pendulum have been obtained by using genetic algorithm based on the numerical simulation results of the pendulum structure optimization. | Send Orders for Reprints to reprints@benthamscience.ae The Open Electrical Electronic Engineering Journal 2015 9 67-73 67 Open Access Optimization of a Multi-pendulum Wave Energy Converter Jun Zhang Chenglong Li Hongzhou He and Xiaogang Zang Fujian Province Key Lab of Energy Cleaning Utilization and Development School of Mechanical and Energy Engineering Jimei University Xiamen 361021 China Abstract In order to improve the energy capture efficiency of a multi-pendulum wave energy converter a mathematical model of the pendulum structure has been built. The final structure parameters of the pendulum have been obtained by using genetic algorithm based on the numerical simulation results of the pendulum structure optimization. The results show that under obtained structure parameters the proposed multi-pendulum device can obtain maximum energy conversion efficiency. Keywords Genetic algorithm multi-pendulum structure optimization wave power generation. 1. INTRODUCTION For the pendulum wave energy converter the factors that influence the hydrodynamic characteristics of the pendulum include buoyancy airfoil structure pendulum corresponding to the flow angle of attack and fluid medium etc. When the installation site and mode are determined the corresponding flow medium and the flow angle of attack can be determined. Thus in order to improve the water dynamic characteristics of the pendulum the first task is to choose or design the reasonable pendulum structure. However the pendulum structure s optimization involves the three-dimensional wave on the pendulum such as wave force on the pendulum and the study has the complex three-dimensional radiation which makes the three-dimensional solution extremely difficult 1 2 . Therefore the present optimization for pendulum structure was conducted based on the results of the numerical simulation. According to our previous research 3 a new multipendulum wave energy converter is proposed and it is shown in Fig. 1 . It consists of .