Numerical study of a point absorber wave energy converter with tuned variable inerter

Nemoto, Yudai; Takino, Minoru; Tsukamoto, Shota; Asai, Takahiro

doi:10.1016/j.oceaneng.2022.111696

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…Compared with the previous model, the model established in this article has several improvements 22,23 . Most of the previous models mainly considered the heave motion of the float, this model integrates both the heave and pitch motions of the float and the vibrator 24–27 . This allows for a more accurate representation of the motion dynamics in real‐world wave conditions.…”

Section: Resultsmentioning

confidence: 99%

“…22,23 Most of the previous models mainly considered the heave motion of the float, this model integrates both the heave and pitch motions of the float and the vibrator. [24][25][26][27] This allows for a more accurate representation of the motion dynamics in real-world wave conditions. In addition, the model includes linear radiation damping and nonlinear viscous damping forces, which are often neglected in other models.…”

Section: Model Promotion Evaluationmentioning

confidence: 99%

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Oscillating body wave energy conversion efficiency based on Simulink simulation training

Yin,

Lu,

et al. 2024

Energy Science & Engineering

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With the development of the economy and society, we are faced with the dual challenges of energy demands and environmental pollution. As one of the important marine renewable energies, wave energy is widely distributed and abundant, and has considerable applications in various fields. Oscillating body wave energy converter (WEC) is most popular among WECs; its energy conversion efficiency is thus one of the key issues for practical large‐scale applications. This article establishes a new model of the float and vibrator under different motion conditions, conducts simulation training, and then solves the displacement and velocity at different times, and finally optimizes the maximum output power and optimal damping coefficient. Simulink calculation is one of the most effective tools including neural networks, which allows us to achieve intelligent training and simulation. The obtained data imply that the maximum output power could be 8.102 W when the corresponding linear damping is 21,000 N s/m and the rotation damping is 95,000 N s/m. The article takes into account the pitching motion of the float, providing a more realistic model and obtaining optimal power absorbing efficiency. The obtained results could be the potential reference data in practically setting up the wave energy conversion systems.

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Section: Resultsmentioning

confidence: 99%

Section: Model Promotion Evaluationmentioning

confidence: 99%

Oscillating body wave energy conversion efficiency based on Simulink simulation training

Yin,

Lu,

et al. 2024

Energy Science & Engineering

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“…The advent of semi-active inerters has further spurred the development of innovative vibration energy harvesters. Mechanical network schematic of the semi-active inerter-based point absorber for wave energy harvesting (Nemoto et al, 2022).…”

Section: Energy Harvestingmentioning

confidence: 99%

“…Wave energy harvesters benefit from resonance, as demonstrated by ref (Budar and Falnes, 1975). Nemoto et al (2022), integrated a semiactive inerter into a point absorber (PA) for natural frequency tuning to pursue resonance. The mechanical network schematic of such a system is illustrated in Figure 15.…”

Section: Energy Harvestingmentioning

confidence: 99%

Semi-active inerters: a review of the literature

Tran,

Jin,

Deng

et al. 2024

Front. Mater.

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The inerter was introduced as a mechanical counterpart to the electrical capacitor, completing the force-current analogy. This is a one-port, two-terminal device in which the equal and opposite forces exerted at its terminals are proportional to the relative acceleration between them. Within this relationship, the “inertance” is the coefficient of proportionality and carries the unit of mass. This implies that the inerter can exert an inertial force at its terminals, effectively representing a virtual mass. Due to these properties, inerters have gained popularity, finding applications as components of vibration control systems and energy harvesters. Derived from passive inerters, semi-active inerters are integrated with active control systems to regulate their inertance. Since their introduction, semi-active inerters have been pivotal in situations demanding active monitoring of natural frequency or control force, generally outperforming their passive counterparts. While numerous significant reviews on passive inerters and their applications have been published in respected journals, dedicated literature reviews on semi-active inerters remain scarce. This review seeks to bridge this gap, offering a comprehensive literature review on semi-active inerters and highlighting research challenges and opportunities. Given the novelty of semi-active inerters, they present a fascinating area of study.

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