Motion simulation and performance analysis of two-body floating point absorber wave energy converter

Ma, Yong; Zhang, Aiming; Yang, Lele; Li, Hao; Zhai, Zhenfeng; Zhou, Heng

doi:10.1016/j.renene.2020.05.026

Cited by 15 publications

(2 citation statements)

References 21 publications

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“…When the wavelength is much higher than the wave height, ocean waves can be explained by potential linear wave theory. 28 The simple case is considered, in which the buoy only oscillates in vertical direction. Therefore, the dynamic motion equation of the buoy oscillating in monochromatic waves can be written as:…”

Section: Hydrodynamic Analysismentioning

confidence: 99%

A novel single‐body system for direct‐drive wave energy converter

et al. 2020

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Ocean wave energy has played a key role of the renewable energy. This study presents a novel single-buoy wave energy converter (WEC) with directly driven power takeoff (PTO) system to overcome some difficulties that the PTO system in the conventional single-body direct-drive WEC (DD-WEC) is fully submerged under water and far away from the water surface. A rectangular buoy, a direct-drive PTO system with Halbach permanent magnet linear generator (HPMLG), and slide rails form the chief institutions of the WEC. The translator of the HPMLG is installed on the lateral surface of buoy, and the stator is mounted on the seacoast or the boats and ships. While wave drives the floating buoy to move, a relative movement between the translator and the stator of the HPMLG is caused. Then, the relative movement generates electricity. To explore theoretically its feasibility, the dynamics of the wave and the floating buoy is analyzed in detail. Thus, the structural parameters are analyzed and determined, and load performance is described. Furthermore, the finite element method (FEM) is used to conduct the performance evaluation of the

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Section: Hydrodynamic Analysismentioning

confidence: 99%

A novel single‐body system for direct‐drive wave energy converter

et al. 2020

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“…Zheng [17] established an optimization model of energy conversion performance via genetic algorithm. Ma [18] researched the two-body floating point absorber and the results showed that stiffness coefficient had less effect on the power generation than damping coefficient. Ji [19] proved that PTO damping coefficient and submerged body volume were the most important parameters that affect the output power, and that the significant wave height had little influence on conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Capture Power Prediction of the Frustum of a Cone Shaped Floating Body Based on BP Neural Network

Wang

Liu

Bai

et al. 2021

JMSE

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How to improve the power generation of wave energy converters (WEC) has become one of the main research objectives in wave energy field. This paper illustrates a framework on the use of back propagation (BP) neural network in predicting capture power of the frustum of a cone shaped floating body. Mathematical model of single floating body is derived, and radius, semi-vertical angle, mass, submergence depth, power take-off (PTO) damping coefficient, and stiffness coefficient are identified as key variables. Commercial software ANSYS-AQWA is used for numerical simulations to obtain hydrodynamic parameters, and then capture power is calculated by these parameters. A database containing 100 samples is established by Latin hypercube sampling (LHS) method, and a simple feature study is conducted. A BP neural network model with high accuracy is designed and trained for predictions based on built database. The results show that forecasting results and desired outputs are in great agreement with error percentage not greater than 4%, correlation coefficient (CC) greater than 0.9, P value close to 1, and root mean square error (RMSE) less than 139 W. The proposed method provides a guideline for designers to identify basic parameters of the floating body and system damping coefficient.

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Design and Numerical Study of a 2-DoF Mechanism for Efficient Wave Energy Extraction in Onshore Application

Solazzi

Pellegrini

2021

Mechanisms and Machine Science

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Motion simulation and performance analysis of two-body floating point absorber wave energy converter

Cited by 15 publications

References 21 publications

A novel single‐body system for direct‐drive wave energy converter

A novel single‐body system for direct‐drive wave energy converter

Capture Power Prediction of the Frustum of a Cone Shaped Floating Body Based on BP Neural Network

Design and Numerical Study of a 2-DoF Mechanism for Efficient Wave Energy Extraction in Onshore Application

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