scholarly journals Development of a Practical Prediction Method of Wave Force for a Wave Energy Converter

2018 ◽  
Vol 27 (0) ◽  
pp. 125-132 ◽  
Author(s):  
Qiao Li ◽  
Motohiko Murai
Keyword(s):  
Wave Energy ◽  
Prediction Method ◽  
Wave Force ◽  
Wave Energy Converter ◽  
Energy Converter

scholarly journals Effect of Dissipation on the Moonpool-Javelin Wave Energy Converter

2021 ◽  
Vol 9 (12) ◽  
pp. 1444
Author(s):  
Dan Yu ◽  
Keyi Wang ◽  
Yeqing Jin ◽  
Fankai Kong ◽  
Hailong Chen ◽  
...  
Keyword(s):  
Wave Energy ◽  
Potential Flow ◽  
Wave Force ◽  
Wave Energy Converter ◽  
Hydrodynamic Performance ◽  
Scale Model ◽  
Energy Converter ◽  
Viscous Term ◽  
Cfd Method ◽  
The Time Domain

In this work, the hydrodynamic performance of a novel wave energy converter (WEC) configuration which combines a moonpool platform and a javelin floating buoy, called the moonpool–javelin wave energy converter (MJWEC), was studied by semianalytical, computational fluid dynamics (CFD), and experimental methods. The viscous term is added to the potential flow solver to obtain the hydrodynamic coefficients. The wave force, the added mass, the radiation damping, the wave capture, and the energy efficiency of the configuration were assessed, in the frequency and time domains, by a semianalytical method. The CFD method results and the semianalytical results were compared for the time domain by introducing nonlinear power take-off (PTO) damping; additionally, the viscous dissipation coefficients under potential flow could be confirmed. Finally, a 1:10 scale model was physically tested to validate the numerical model and further prove the feasibility of the proposed system.

Analysis of Hydrodynamic Model of Wave Energy Converter of Inverse Pendulum

2013 ◽  
Vol 483 ◽  
pp. 223-228
Author(s):  
Shou Qi Cao ◽  
Shu Man Fu ◽  
Zi Yue Wu
Keyword(s):  
Wave Energy ◽  
Hydrodynamic Model ◽  
Mechanical Energy ◽  
Wave Force ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Wave Condition ◽  
Conversion Model ◽  
Fluent Software ◽  
Sea Area

The efficiency analysis of wave energy collection and conversion is crucial for utility of wave energy of inverse pendulum. In the paper, we build the hydrodynamic model of interaction between pendulum and wave in wave energy converter of inverse pendulum. On the basis of this typical model, we choose the actual wave condition of some sea area in the east of China as the background, research the hydrodynamic property of pendulum by numerical simulation with fluent software, get the relation curve of between the rotation angle of pendulum and moment of wave force with time, and acquire energy conversion model from wave energy to mechanical energy in wave energy converter of inverse pendulum. It makes the beneficial exploration for optimal design of wave energy converter of inverse pendulum.

scholarly journals VALIDATION OF A PROBABILISTIC METHOD FOR THE STRUCTURAL

2017 ◽  
pp. 28
Author(s):  
Mariano Buccino ◽  
Fabio Dentale ◽  
Daniela Salerno ◽  
Pasquale Contestabile
Keyword(s):  
Wave Energy ◽  
Pilot Plant ◽  
Probabilistic Method ◽  
Prediction Method ◽  
Wave Energy Converter ◽  
Random Wave ◽  
Slope Parameter ◽  
Regular Waves ◽  
Energy Converter ◽  
Norwegian Coast

The paper deals with the validation of a wave by wave approach for the calculation of the wave loadings exerted on an overtopping type Wave Energy Converter named Seawave Slot-Cone Generator (SSG). The prediction method, originally developed for regular waves, employs the Iribarren number (Battjes, 1974), the slope parameter (Svendsen, 2006) and the Linear thrust parameter (Buccino et al., 2015) as main predictors. The approach has been tested against five 2-D random wave tests, carried out in view of the design of a new pilot plant to be located along the Norwegian coast.

Improvement of Performance of Wave Power Conversion Due to the Projecting Walls for Oscillating Water Column Type Wave Energy Converter

2016 ◽  
Vol 138 (2) ◽  
Author(s):  
Tomoki Ikoma ◽  
Koichi Masuda ◽  
Hikaru Omori ◽  
Hiroyuki Osawa ◽  
Hisaaki Maeda
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Prediction Method ◽  
Past Research ◽  
Wave Energy Converter ◽  
Air Pressure ◽  
Wave Power ◽  
Linear Potential ◽  
Oscillating Water Column ◽  
Energy Converter

This paper describes a method to improve the performance of primary conversion of wave power takeoff. The wave energy converter (WEC) used here was of oscillating water column (OWC) type. This method for improvement has been already proposed in past research and its usefulness has been confirmed. It involves projecting walls (PWs) being attached to the front of the inlet–outlet of the OWC. The prediction method of hydrodynamic behaviors for the OWC type WEC with PWs installed is explained in this paper. The boundary element method with the Green's function is applied, and influence of air pressure and free surface within every air-chamber was directly taken into consideration in the prediction method based on linear potential theory. Validity of the prediction method was proved by comparing the results with the results of model experiments. Series calculations are performed with the prediction method. Behaviors of air pressure, water elevation, and the efficiency of primary conversion of wave power were investigated. From the calculations, length of the PWs was shown to affect the efficiency of primary conversion. It was possible to equip the PWs so as to enable improvements in oblique waves to beam sea conditions as well as in the head sea conditions. This paper examined not only the PWs but also the application and effects of the end walls (EWs) with the slit. The EWs were very useful to improve the efficiency.

The Dynamic Performance of Coaxial Double Column Wave Energy Converter (WEC)

2020 ◽  
Vol 54 (2) ◽  
pp. 44-56
Author(s):  
Yupeng Duan ◽  
Hengxu Liu ◽  
Dan Yu ◽  
Fankai Kong ◽  
Zhiyang Zhang ◽  
...  
Keyword(s):  
Power Generation ◽  
Output Power ◽  
Wave Energy ◽  
Dynamic Performance ◽  
Wave Force ◽  
Diameter Ratio ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Domain Models ◽  
Motion Characteristics

AbstractA coaxial double-column wave energy converter (WEC) has been studied in this paper. The wave force of the floats and the hydrodynamic coefficients are solved by a semi-analytical solution method. We built time- and frequency-domain models and calculated the motion characteristics and power generation of the coaxial double-column WEC through the commercial software HydroSTAR and Intel Fortran. We use computers to build models of many different parameters and study the effects of different parameters on the motion performance and power generation capabilities of the device. They show that changing the diameter ratio of the upper float to the lower float can increase the output power of the device, and the smaller the diameter ratio, the larger the output power can be obtained. We also changed the depth of the damper plate and found that the deeper the damper plate, the higher the output power of the device. However, in general, the depth of the damper plate has no significant influence on the output power of the device.

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