A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

Liu, Zhenwei; Wang, Xu; Zhang, Ran; Wang, Liuping

doi:10.3390/en11071653

Cited by 11 publications

(9 citation statements)

References 63 publications

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“…The novel PTO concepts for point absorbers have been studied where a speed amplified PTO with pulley system has shown the advantage of being able to collect more energy. The novel wave energy conversion systems have been developed with speed amplified mechanism and optimized topology of stator and translator where the parameter sensitivity study of the speed amplified PTO system is also important [125]. The experimental validation will be conducted this year.…”

Section: The Contributionsmentioning

confidence: 99%

A Survey of Power Take-off Systems of Ocean Wave Energy Converters

Z¹,

Zhang²,

Xiao³

et al. 2019

Preprint

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Ocean wave energy conversion as one of the renewable clean energy sources is attracting the research interests of many people. This review introduces different types of power take-off technology of wave energy converters. The main focus is the linear direct drive power take-off devices as they have the advantages for ocean wave energy conversion. The designs and optimizations of power take-off systems of ocean wave energy converters have been studied from reviewing the recently published literature. Also, the simple hydrodynamics of wave energy converters have been reviewed for design optimization of the wave energy converters at specific wave sites. The novel mechanical designs of the power take-off systems have been compared and investigated in order to increase the energy harvesting efficiency.

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Section: The Contributionsmentioning

confidence: 99%

A Survey of Power Take-off Systems of Ocean Wave Energy Converters

Z¹,

Zhang²,

Xiao³

et al. 2019

Preprint

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“…We are a multidisciplinary team working on wave energy harvesting for Australia; focusing on three main aspects: Hydrodynamics and design of point absorbers WECs; where hydrodynamic and design optimizations of two-body WECs ensure that they are able to capture the most power for places with low frequency and high energy density like Australia [94]. Development of novel PTO concepts for point absorbers; where novel vibration energy harvesting systems are numerically and experimentally developed for point absorbers to operate at low frequency and be cost effective [34,115]. And finally, power electronics, electrical energy storage and grid connectivity for WECs to ensure a smooth and stable electric power supply [116].…”

Section: Our Contributionsmentioning

confidence: 99%

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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“…Despite being a main issue, it is actually difficult to optimise the frequency bandwidth of a harvester as the definition of an 'optimum' frequency bandwidth is vague and maximising the bandwidth would generally take a large toll on the power output. Hence, most studies would focus on methods to improve the frequency bandwidth instead of optimising it [7][8][9]. In contrast, many studies have been conducted to optimise the power output of a vibration energy harvester.…”

Section: Introductionmentioning

confidence: 99%

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Foong

Thein

Yurchenko

2020

Journal of Sound and Vibration

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This study investigates several important considerations to be made when optimising the structural aspects of a single-degree-of-freedom (SDOF) electromagnetic vibration energy harvester. Using the critically damped stress method, the damping and power output of the harvester were modelled and verified, displaying an excellent agreement with the experimental results. The SDOF harvester was structurally optimised under a certain set of constraints and it was found that under the fixed beam's thickness condition, the harvester displayed an insignificant increase in power output as a function of volume when the device's size was relatively larger. This highlights the importance of considering a smaller practical volume for this case. Additionally, when optimising the device using a low stress constraint and a low damping material, it was observed that considering the load resistance as an input parameter to the objective function would lead to a higher power output compared to the optimum load resistance condition. Further analysis indicated that there exists a power limit when the electromagnetic coupling coefficient approaches infinity. For the case of a high electromagnetic coupling coefficient value and a small volume constraint, it is possible to achieve approximately 80.0% of the harvester's power limit. Finally, it was demonstrated that a high power output can be achieved for a SDOF electromagnetic harvester by considering a high-density proof mass centred at the free end of the beam.

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A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

Cited by 11 publications

References 63 publications

A Survey of Power Take-off Systems of Ocean Wave Energy Converters

A Survey of Power Take-off Systems of Ocean Wave Energy Converters

Point Absorber Wave Energy Harvesters: A Review of Recent Developments

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

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