Conversion System of Ocean Buoys Based on Wave Energy

Song, Baowei

doi:10.3901/jme.2012.12.139

Cited by 15 publications

(4 citation statements)

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“…It is assumed that the wave moves in a two-dimensional plane and its shape remains unchanged [13][14], as shown in Figure 5. H is wave height, A is amplitude, η=η (x, z, t) is waveform function, λ is wavelength h, and D is water depth.…”

Section: Mathematical Model Of Wavementioning

confidence: 99%

Design and research of energy supplement system for ocean buoy

Fang

Zhang²,

Zuo³

et al. 2023

J. Phys.: Conf. Ser.

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Aiming at the problem of energy supplements for ocean buoys, an energy supplement system for ocean buoys is designed. The buoy shakes under the action of waves, and the energy supplement system located in the buoy collects ocean kinetic energy and converts it into stable electric energy for buoy power supplement or storage. The working principle, design schemes, and structural composition of the ocean buoy energy supplement system are determined. According to the motion principle of the shaking pendulum, the system torque equation is established. AQWA is used to simulate the motion characteristics of the floater under the first level of regular and irregular waves, and the roll angle displacement of the floater is taken as the input of the simulation model. The joint simulation of Adams and AMESim is used to build the electromechanical coupling simulation model of the system, which verifies the rationality of the design scheme. The results show that 3.3 V and 1 A DC can be generated under the action of first-order regular wave and irregular wave, and stable power output can be achieved to supplement the buoy or charge the battery.

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Section: Mathematical Model Of Wavementioning

confidence: 99%

Design and research of energy supplement system for ocean buoy

Fang

Zhang²,

Zuo³

et al. 2023

J. Phys.: Conf. Ser.

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“…In this paper, the motion relation between wave and buoy is analysed, and the operation characteristics of the converter are analysed. In the ideal sea conditions, the wave motion changes cyclically over time, and the stable wave is an approximately sinusoidal harmonic wave with constant wavelength λ , wave height A 0 and angular frequency ω 0 [12, 13]. The equation of wave motion is given as

S_{0} ()(, t) = A_{0} \sin ω_{0} t

Under ideal design, the cylindrical buoy only moves in the vertical direction, and the buoy is mainly affected by buoyancy F fl , self‐gravity G , spring tension F r and the pulling force of the piston connecting rod F h .…”

Section: Mathematical Modelmentioning

confidence: 99%

“…By combining (1)–(6), the expression of buoy displacement can be given as

\begin{matrix} right leftthickmathspace.5em \\ S_{1} (t) & = C_{1} \cos \sqrt{\frac{f + ρ g π r^{2}}{m + ρ H D_{1}}} t + C_{2} \sin \sqrt{\frac{f + ρ g π r^{2}}{m + ρ H D_{1}}} t \\ + \frac{ρ g π r^{2} A_{0}}{ω_{0}^{2} (m + ρ normalH D_{1}) - f - ρ g π r^{2}} \sin ω_{0} t + \frac{ρ g H D_{2} + h f}{ρ g π r^{2} + f} \end{matrix}

Analysis of (7) shows that the steady state of the buoy is approximately sinusoidal motion [12], its motion angle frequency is the same as the rated wave angle frequency, and its amplitude is given by

A_{1} = \frac{ρ g π r^{2} A_{0}}{ω_{0}^{2} ()(, m + ρ H D_{1}) - f - ρ g π r^{2}}

The displacement of the buoy is consistent with the displacement of the piston plate in the hydraulic cylinder. The flow of seawater into the storage reservoir through the piston device gives

Q_{1} = ({, \begin{matrix} 1em4pt \\ D_{1} \frac{d (||, S_{1} ()(, t))}{d t}, & (||, S_{1}) \end{matrix})

…”

Section: Mathematical Modelmentioning

confidence: 99%

Pumped‐storage power generation system based on wave energy

Zhang

Zhu

2017

J. eng.

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“…Thousands of patents on wave power have been approved, while only a small proportion has been applied to commercial use on a large scale, the ultimate reasons for which are the great risk and high cost of wave power due to the complex and variable sea conditions [4,5]. Therefore, the study of how to develop new type of wave power technology to enhance reliability and reduce the generating cost has become the focus of the wave power research [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Buoy-Rope-Drum Wave Power System

Zhu

Wang

Yang

et al. 2013

Advances in Mechanical Engineering

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A buoy-rope-drum wave power system is a new type of floating oscillating buoy wave power device, which absorbs energy from waves by buoy-rope-drum device. Based on the linear deep water wave theory and pure resistive load, with cylinder buoy as an example, the research sets up the theoretical model of direct-drive buoy-rope-drum wave power efficiency and analyzes the influence of the mass and load of the system on its generating efficiency. It points out the two main categories of the efficient buoyrope-drum wave power system: light thin type and resonance type, and optimal designs of their major parameters are carried out on the basis of the above theoretical model of generating efficiency.

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Conversion System of Ocean Buoys Based on Wave Energy

Cited by 15 publications

References 0 publications

Design and research of energy supplement system for ocean buoy

Design and research of energy supplement system for ocean buoy

Pumped‐storage power generation system based on wave energy

Buoy-Rope-Drum Wave Power System

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