Study on Hydraulic System Efficiency of Heaving-Buoy Wave Energy Converter

作     者：SHI Hongda ZHAO Chenyu LIU Zhen CAO Feifei 

作者机构：College of EngineeringOcean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Ocean EngineeringQingdao 266100China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2018年第17卷第5期

页      面：1044-1052页

核心收录：

学科分类：08[工学] 0824[工学-船舶与海洋工程] 

基　　金：the support of the Marine Renewable Energy Project(No.GHME2016YY02) the National Natural Science Foundation of China(Nos.41376100 and 41706100) the Shandong Provincial Natural Science Key Basic Program(No.ZR2017ZA0202) the Fundamental Research Funds for the Central Universities(No.201564005) 

主　　题：hydraulic system PTO nonlinear hydraulic resistance efficiency gas content 

摘      要：The hydraulic system is the key component in the widely used wave energy converters(WEC).In this paper,we theoretically analyze and describe our investigation of the efficiency of the hydraulic system by simulation and model testing of the combined heaving-buoy *** derive a new governing equation that includes nonlinear hydraulic resistance in the power take-off(PTO).We conducted a physical model experiment based on a 100-kW prototype and applied a hydraulic system with an energy *** model test results reveal an important parameter related to efficiency with respect to nonlinear hydraulic *** also studied the relationship between the efficiency and the initial ***,based on our numerical simulation results,we discuss the effect on efficiency of the gas content of the hydraulic fluid and ways to reduce its impact.