Parametric study of two-body floating-point wave absorber

Amiri, Atena; Panahi, Roozbeh; Radfar, Soheil

doi:10.1007/s11804-016-1342-1

Cited by 55 publications

(11 citation statements)

References 14 publications

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“…The results were verified by experimental ones, and the nonlinear wave interactions (such as wave overtopping) and viscous effects were showcased. Amiri, et al [91] formulated a comprehensive linear mathematical model of two-body WECs in both the frequency and time domain, with the hydrodynamics calculated using ANSYS Aqwa. The simulations were validated against experiments of a similar scaled down model, and a parametric study was conducted to study the effect of different sea states, PTO damping coefficient and float geometry on the power output.…”

Section: Theoretical Developmentmentioning

confidence: 99%

“…A cylindrical buoy with a small draft and a conical bottom as shown in Figure 14 was proved to capture the most power. Optimized buoy shape to harvest more power [91].. [84] modeled a multiple degrees of freedom point absorber, and numerically designed the PTO as a third degree of freedom, then a small parametric study was conducted where the design parameters influencing the generated power were analyzed, it was deduced that the floater's buoyancy and the submerged body's added mass had the greatest effect on the generated power. Tarrant and Meskell [92] investigated parametric resonance of the Davis, Thomson, Mundon and Fabien [84] modeled a multiple degrees of freedom point absorber, and numerically designed the PTO as a third degree of freedom, then a small parametric study was conducted where the design parameters influencing the generated power were analyzed, it was deduced that the floater's buoyancy and the submerged body's added mass had the greatest effect on the generated power.…”

Section: Theoretical Developmentmentioning

confidence: 99%

See 1 more Smart Citation

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

2018

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Even though ocean waves around the world are known to contain high and dense amounts of energy, wave energy harvesters are still not as mature as other forms of renewable energy harvesting devices, especially when it comes to commercialization, mass production, and grid integration, but with the recent studies and optimizations, the point absorber wave energy harvester might be a potential candidate to stand out as the best solution to harvest energy from highly energetic locations around the world’s oceans. This paper presents an extensive literature review on point absorber wave energy harvesters and covers their recent theoretical and experimental development. The paper focuses on three main parts: One-body point absorbers, two-body point absorbers, and power take-offs. This review showcases the high amount of work being done to push point absorbers towards technological maturity to eventually kick off commercialization and mass production. It should also provide a good background on the recent status of point absorber development for researchers in the field.

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Section: Theoretical Developmentmentioning

confidence: 99%

Section: Theoretical Developmentmentioning

confidence: 99%

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

2018

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“…Ma [21] used ANSYS-AQWA software to assess the hydrodynamic performance and energy conversion of a pitching float WEC and analyzed key factors' influences on the performance. Amiri [22] presented a numerical simulation scheme for a point wave absorber and analyzed its performance. Yu [23] applied Reynolds-Averaged Navier-Stokes (RANS) computational method for analyzing the hydrodynamic heave response of a specific WEC device.…”

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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“…Some relevant successes have been achieved in recent years. For example, two-body point absorber wave energy converters (WECs) have been developed as promising systems for energy generation from ocean waves, and their hydrodynamic analysis has become an important research topic (Amiri et al 2016). Various WECs are under development and testing at Ocean Power Technologies (OPT), the National Renewable Energy Laboratory, USA, and the University of Victoria, Canada.…”

Section: Introductionmentioning

confidence: 99%

Performance of Two Types of Mooring Systems in the Heave Motion of a Two-body Floating Wave Energy Converter

Berenjkoob

Ghiasi

Soares

2019

J. Marine. Sci. Appl.

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This work investigated the influence of two types of mooring systems on the hydrodynamic performance of a two-body floating wave energy converter (WEC). It also investigated the effects of the physical parameters of the mooring system on the amount of extractable power from incident waves in the frequency domain. The modeled converter comprised a floating body (a buoy), a submerged body with two mooring systems, and a coupling system for two bodies. The coupling system was a simplified power takeoff system that was modeled by a linear spring-damper model. The tension leg mooring system could drastically affect the heave motion of the submerged body of the model and increase relative displacement between the two bodies. The effects of the stiffness parameter of the mooring system on power absorption exceeded those of the pretension tendon force. Keywords Two-body WEC. Three-point mooring. Wave energy. Tension-leg mooring system. Mooring parameters Article Highlights • Two types of mooring systems, which are tension leg mooring (TLM) and three-point taut mooring (TPM) systems, are applied to the model and compared their effect on the WEC model efficiency. • The TLM system showed outstanding performance in increasing the relative heave displacement between the two bodies of the model compared to the TPM system. • The effect of the TLM system on the absorbed power was more remarkable than that of the TPM system. • The parameter of mooring lines stiffness can improve the hydrodynamic performance of the model and raise the absorption efficiency of the model compared to the pretension parameter of tendons.

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Parametric study of two-body floating-point wave absorber

Cited by 55 publications

References 14 publications

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

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

Performance of Two Types of Mooring Systems in the Heave Motion of a Two-body Floating Wave Energy Converter

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