Maximizing onboard power generation of large-scale railway vibration energy harvesters with intricate vehicle-harvester-circuit coupling relationships

Dong, Liwei; Hu, Guobiao; Yu, Jie; Zhao, Chaoyang; Qu, Shuai; Yang, Yue

doi:10.1016/j.apenergy.2023.121388

Cited by 6 publications

(1 citation statement)

References 60 publications

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“…Their tests yielded an average power output of 2.24 W at a speed of 30 km h −1 . Another study by Dong et al [24]. Proposed a systematic modeling approach for vibration energy harvesting that considers the intricate interaction and coupling in the vehicle-harvestercircuit system.…”

Section: Introductionmentioning

confidence: 99%

A dual-kinetic energy harvester operating on the track and wheel of rail deceleration system for self-powered sensors

Salman,

Fan,

Pan

et al. 2023

Smart Mater. Struct.

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Alternative energy sources play a crucial role in Outback rail systems, where electrical infrastructure is unavailable for automated power devices used for traffic lights, surveillance cameras, sensors, and other safety equipment at railway stations and intersections. The current study proposes an innovative dual-kinetic energy harvester design to reduce train speed at intersections and before it comes to a halt at the station. Additionally, it harvests energy from both the train track and wheel simultaneously. The proposed device consists of three main units. The first unit utilizes vibrational movement based on a rack pinion. An efficient dual-kinetic energy harvesting system has been developed, utilizing a novel concept that captures the vibration energy generated by the movement of the rail under the influence of the train’s weight. Additionally, as the train passes at high speed, the train wheel’s energy will be transmitted to the top of the device, moving the rack to a depth of 30 mm. A spiral spring is employed to restore the rack to its initial position after the wheel has passed. The tension force of the spring causes the rack to adhere to the track, enabling the transmission of vibrations generated by the track’s movement and releasing energy, causing the motion to be induced during the return stroke. The second component is the transmission unit. The bidirectional rotational motion from the rack pinion is converted into unidirectional rotational motion using three bevel gears, two roller clutches, and a planetary gearbox to enhance the rotations of the generator shaft. The third component is a 1500 W/180 V DC motor for electricity generation. Lastly, the charging circuit was developed to recharge supercharged capacitors. The proposed system was installed before the railway station, and practical tests were conducted, which showed an efficiency of up to 55%.

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Section: Introductionmentioning

confidence: 99%

A dual-kinetic energy harvester operating on the track and wheel of rail deceleration system for self-powered sensors

Salman,

Fan,

Pan

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

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Advanced Aerodynamics‐Driven Energy Harvesting Leveraging Galloping‐Flutter Synergy

Dong,

Hu,

Tang

et al. 2024

Adv Funct Materials

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Flow‐induced vibrations (FIVs) serve as the fundamental principle of non‐rotary wind energy harvesting. However, nanogenerators relying on a single FIV effect remain constrained by insufficient breeze energy conversion efficiency. In this paper, we propose a novel galloping‐flutter coupled nanogenerator (GFNG) that leverages the synergistic interaction between these two aerodynamic phenomena, to achieve high performance across broad wind speed bandwidth. A galloping‐flutter coupled mechanism (GFM) is implemented using a multifunctional flexible beam that integrates a galloping piezoelectric energy harvester (GPEH) and a fluttering triboelectric nanogenerator (FTENG). Through meticulous optimization, it significantly enhances the average electrical output of the FTENG by up to six times at low wind speeds below 6 m s−1, by intensifying the triboelectric contact behavior through galloping‐induced beam oscillations. The GFNG demonstrates a maximum average power of 6.3 mW across wind speeds from 1.4 to 10 m s−1, along with a remarkable power density of 7.1 W m−2 of the enhanced FTENG at 10 m s−1, enabling the lighting of 508 LEDs and stable power supply for wireless sensor nodes (WSNs). This study offers new insights into designing high‐performance aerodynamics‐driven nanogenerators by harnessing multiple FIV synergistic effects, broadening the potential for intelligent wind energy applications.

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Flag-type hybrid nanogenerator utilizing flapping wakes for consistent high performance over an ultra-broad wind speed range

Dong,

Tang,

Zhao

et al. 2024

Nano Energy

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Maximizing onboard power generation of large-scale railway vibration energy harvesters with intricate vehicle-harvester-circuit coupling relationships

Cited by 6 publications

References 60 publications

A dual-kinetic energy harvester operating on the track and wheel of rail deceleration system for self-powered sensors

A dual-kinetic energy harvester operating on the track and wheel of rail deceleration system for self-powered sensors

Advanced Aerodynamics‐Driven Energy Harvesting Leveraging Galloping‐Flutter Synergy

Flag-type hybrid nanogenerator utilizing flapping wakes for consistent high performance over an ultra-broad wind speed range

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