Numerical Simulation Method of Hydraulic Power Take-Off of Point-Absorbing Wave Energy Device Based on Simulink

Fengmei Jing, Song Wang (), Tonio Sant, Christopher Micallef and Jean Paul Mollicone
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Fengmei Jing: School of Mechanical and Vehicle, Beijing Institute of Technology, Beijing 100081, China
Song Wang: School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Tonio Sant: Department of Mechanical Engineering, University of Malta, MSD 2080 Msida, Malta
Christopher Micallef: Department of Mechanical Engineering, University of Malta, MSD 2080 Msida, Malta
Jean Paul Mollicone: Department of Mechanical Engineering, University of Malta, MSD 2080 Msida, Malta

Energies, 2024, vol. 17, issue 14, 1-14

Abstract: Wave energy has a high energy density and strong predictability, presenting encouraging prospects for development. So far, there are dozens of different wave energy devices (WECs), but the mechanism that ultimately converts wave energy into electrical energy in these devices has always been the focus of research by scholars from various countries. The energy conversion mechanism in wave energy devices is called PTO (power take-off). According to different working principles, PTOs can be classified into the linear motor type, hydraulic type, and mechanical type. Hydraulic PTOs are characterized by their high efficiency, low cost, and simple installation. They are widely used in the energy conversion links of various wave energy devices. However, apart from experimental methods, there is currently almost no concise numerical method to predict and evaluate the power generation performance of hydraulic PTO. Therefore, based on the working principle of hydraulic PTO, this paper proposes a numerical method to simulate the performance of a hydraulic PTO using MATLAB(2018b) Simulink ® . Using a point-absorption wave energy device as a carrier, a float hydraulic system power-generation numerical model is built. The method is validated by comparison with previous experimental results. The predicted power generation and conversion efficiency of the point-absorption wave energy device under different regular and irregular wave conditions are compared. Key factors affecting the power generation performance of the device were investigated, providing insight for the subsequent optimal design of the device, which is of great significance to the development and utilization of wave energy resources.

Keywords: point-absorption WEC; hydraulic PTO; simulink modeling; performance evaluation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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