Optimization of a two-mass vibration-based electromagnetic energy harvester using simulated annealing method

Chiu, Min‐Chie; Chang, Yeong‐Hwa; Yeh, Long-Jyi; Chung, Chiu-Hung

doi:10.1177/1461348418757887

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…Chiu et al also conducted a series of studies on vibrating electromagnetic energy extractors via the air medium. [11][12][13] Kimoulakis et al 14 used waves to drive buoys and connect permanent magnet onshore linear generators to generate electricity. However, these designs are limited to land-based power generation and fail as a longterm power supply for subsea sensors.…”

Section: Introductionmentioning

confidence: 99%

Optimizing energy harvesting from ship-based buoys using Bat Algorithm—A case study

Chiu,

Cheng

2024

AIP Advances

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It is imperative to explore alternative, preferably renewable energy sources to diminish our reliance on coal and oil, thereby mitigating the adverse impacts of greenhouse gases. For this, an approach was proposed to generate electrical power through energy harvesting from a ship’s buoy riding a lake’s wave. Specifically, an electrical power generation device was established on the side of the ship using a generator and a rod connected to the skirt-type buoy. With the buoy bobbing in the waves, the rod swung due to the relative height difference between the bobbing buoy and the ship, thus generating periodic electrical power. A case study was performed with a fetch of 4 km, a lake depth of 10 m, and a wind speed of 4.5 m/s. To maximize the electrical power generated, the ship-based energy harvester was optimized using a bat algorithm. The resulting mathematical analysis exhibits a worthy electrical power output of 241.6 W. This study underscores the potential of hydraulic energy generation as a promising and sustainable renewable energy and offers valuable insights into optimizing energy harvesters for maximized electricity production.

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Section: Introductionmentioning

confidence: 99%

Optimizing energy harvesting from ship-based buoys using Bat Algorithm—A case study

Chiu,

Cheng

2024

AIP Advances

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“…Many energy extraction methods such as the piezoelectric, electromagnetic, magneto-strictive, and electrostatic transducer types have been developed [1,2]. Recently, a vibration-based generator using electromagnetic principle has been widely explored [3][4][5][6][7]. In addition, because of the huge progress in the semiconductor field, MEMS [8] were widely developed.…”

Section: Introductionmentioning

confidence: 99%

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2022

JBRS

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In daily life, many devices, including U-bike bicycle and flying wheel in gym, can convert vibrational mechanical energy into electrical energy. The electrical generation power generations are generally classified into the electromagnetic induction type and the piezoelectric type. The electromagnetic induction type is found to have a best power generation voltage in a low frequency environment. Therefore, based on the electromagnetic induction type, a multi-axis power generator used in a low-speed environment has been introduced and assessed in this paper. In this study, according to Faraday's law and Lenz's law, the characteristics of the magnetic attraction between the magnets are used and instead of the springs, so that the magnets will move in the way of pistons between the pipes. The electromagnetic induction power generation device has a simple structure which is capable of generating a high voltage at a low rotation speed and is easy to obtain. In this study, there are three kinds of power generation devices invented, including a two-axis, a three-axis, and a four-axis electricity generation device. The voltages generated at the respective rotation speeds of each type has been compared and evaluated. Consequently, a four-axis power generation device is found to be capable of generating a high voltage at a low speed. The maximum peak voltage of 21.2 volts and the electric power of 71.54 watts are obtained at a speed of 160 RPM. The four-axis power generation device is the most excellent power generation capability among the three power generation devices.

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“…On the structural side, Kapanen [20] noted that the most important factor to consider when optimising a single-degree-of-freedom (SDOF) electromagnetic harvester under a constrained volume is to maximise the mass of the vibrating object, since the power output of the harvester is proportional to the mass squared. Chiu et al [21] performed an analytical optimisation of a two-degree-of-freedom electromagnetic harvester by considering eight design parameters, which included both the electromagnetic and the structural parameters. On the other hand, Joubaneh and Barry [22] took a slightly different approach where they attempted to optimise the structural and electromagnetic aspect of an electromagnetic resonant shunt tuned mass damper-inerter, which acts as both an energy harvester and a vibration suppressor.…”

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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Optimization of a two-mass vibration-based electromagnetic energy harvester using simulated annealing method

Cited by 12 publications

References 19 publications

Optimizing energy harvesting from ship-based buoys using Bat Algorithm—A case study

Optimizing energy harvesting from ship-based buoys using Bat Algorithm—A case study

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

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