Electromechanical Modeling and Simulation of a Pendulum-Type Wave Energy Converter

2014 ◽  
Vol 953-954 ◽  
pp. 1439-1444
Author(s):  
Bao wei Song ◽  
Xin Yu An ◽  
Zhao Yong Mao ◽  
Hai Bing Wen
Keyword(s):  
Natural Frequency ◽  
Relative Motion ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Floating Body ◽  
Circuit Optimization ◽  
Energy Converter ◽  
Electromechanical Model ◽  
Type Wave ◽  
Mass Spring

This paper concerns the electromechanical model for a pendulum-type wave energy converter (PWEC). By introducing a based-excited mass-spring-damper, the motion of PWEC is divided into two parts: the motion of floating body and the relative motion of the pendulum and floating body. The electromechanical model involves the relative motion. Based on the electromechanical model, the circuit optimization is researched in frequency domain. The simulation results show that the device harvests plenty of power when the excitation is in close proximity to natural frequency, and the output power will decay sharply when the excitation is away from natural frequency. The optimal active power is obtained when the total reactance is zero.

A Study on Development of the Performance Analysis Method of the Floating OWC-WEC Using the MPS Method

2015 ◽  
Author(s):  
Yutaro Sasahara ◽  
Mitsuhiro Masuda ◽  
Kiyokazu Minami
Keyword(s):  
Wave Energy ◽  
Two Phase Flow ◽  
Wave Energy Converter ◽  
Response Analysis ◽  
Phase Flow ◽  
Energy Converter ◽  
Wave Impact ◽  
Two Phase ◽  
Mps Method ◽  
Type Wave

When concrete examination towards utilization is needed, it is necessary to estimate the safety and the performance of a floating Oscillation Water Column (OWC)-type wave energy converter under abnormal oceanographic phenomenon such as large waves, wave impact force, deck wetness and complex motion of mooring system. Therefore, to choose a proper numerical method is important. This present paper describes a fundamental study about estimation of safety and performance of floating OWC-type wave energy converter using the two-phase flow MPS method. In this research, firstly, new algorithm is installed in order to solve problems of the two-phase flow MPS method. Secondly, applicability to an response analysis of a wharf installation type OWC-WEC of the improved MPS method is examined by wave pressure acting to the OWC-WEC and response in the air chamber of the OWC-WEC.

DESIGN AND CONTROL OF A 50KW CLASS ROTATING BODY TYPE WAVE ENERGY CONVERTER

2011 ◽  
pp. 1216-1223
Author(s):  
BYUNG-HAK CHO ◽  
SHIN-YEOL PARK ◽  
DONG-SOON YANG ◽  
KYUNG-SHIK CHOI ◽  
BYUNG-CHUL PARK
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Body Type ◽  
Energy Converter ◽  
Type Wave ◽  
Rotating Body ◽  
And Control

A Serpent-Type Wave Energy Converter

2021 ◽  
Author(s):  
Sebastian Konrad Sorek ◽  
Wojciech Florian Sulisz
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Type Wave

A high-precise model for the hydraulic power take-off of a raft-type wave energy converter

Energy ◽  
2021 ◽  
Vol 215 ◽  
pp. 119107
Author(s):  
Changhai Liu ◽  
Min Hu ◽  
Wenzhi Gao ◽  
Jian Chen ◽  
Yishan Zeng ◽  
...  
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Hydraulic Power ◽  
Type Wave

scholarly journals Establishment of Motion Model for Wave Capture Buoy and Research on Hydrodynamic Performance of Floating-Type Wave Energy Converter

2015 ◽  
Vol 22 (s1) ◽  
pp. 106-111 ◽  
Author(s):  
Hongtao Gao ◽  
Biao Li
Keyword(s):  
Wave Energy ◽  
Structural Parameters ◽  
Absorption Efficiency ◽  
Wave Energy Converter ◽  
Hydrodynamic Performance ◽  
Motion Model ◽  
Energy Converter ◽  
Type Wave ◽  
Energy Absorption Efficiency ◽  
Floating Type

Abstract Floating-type wave energy converter has the advantages of high wave energy conversion efficiency, strong shock resistance ability in rough sea and stable output power. So it is regarded as a promising energy utilization facility. The research on hydrodynamic performance of wave capture buoys is the precondition and key to the wave energy device design and optimization. A simplified motion model of the buoys in the waves is established. Based on linear wave theory, the equations of motion of buoys are derived according to Newton’s second law. The factors of wave and buoys structural parameters on wave energy absorption efficiency are discussed in the China’s Bohai Sea with short wave period and small wave height. The results show that the main factor which affects the dynamic responses of wave capture buoys is the proximity of the natural frequency of buoys to the wave period. And the incoming wave power takes a backseat role to it at constant wave height. The buoys structural parameters such as length, radius and immersed depth, influence the wave energy absorption efficiency, which play significant factors in device design. The effectiveness of this model is validated by the sea tests with small-sized wave energy devices. The establishment methods of motion model and analysis results are expected to be helpful for designing and manufacturing of floating-type wave energy converter.

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