Harvesting Variable-Speed Wind Energy with a Dynamic Multi-Stable Configuration

Wang, Yuansheng; Zhou, Zhiyong; Liu, Qi; Zhu, Peizhi

doi:10.3390/ma13061389

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…Studies have shown that the energy harvester can generate sufficient power over a relatively large range of wind speeds. Wang et al 178 proposed a dynamic multi-stable structure consisting of a piezoelectric beam and a rectangular plate to achieve the harvesting of variable speed wind energy, as shown in Figure 18, which exhibits bistable features at low wind speeds and tri-stable characteristics at high wind speeds. Studies have shown that the system can maintain a large output in variable speed wind environments.…”

Section: Application Of Energy Harvesting Technologymentioning

confidence: 99%

Piezoelectric vibration energy harvester: Operating mode, excitation type and dynamics

Zhou

Cui

et al. 2022

Advances in Mechanical Engineering

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Nowadays, with the rapid development of the intelligent era and the concept of Internet of Things being proposed, more and more sensors will play a more important role. Providing a sustainable power source for sensors has become the focus of current research in microsystem power generation. The harvesting of widely available vibrational energy from the environment for use as an alternative power source for sensors is of great significance in efficient energy utilization. Researchers have been working on developing efficient energy harvesters for broadband and efficient energy harvesting. Nonlinear energy harvesting holds more significant promise. In this paper, we summarized and reviewed the research progress of three different harvesting methods from the perspective of varying energy harvesting methods. We also listed the operation of various harvesters under different excitation types. At the same time, nonlinear energy harvesters with different structural characteristics are reviewed, the benefits of nonlinearity on energy harvesting are effectively collected, and the practical applications are summarized. Finally, current methods and mechanisms to improve the collection efficiency of energy harvesters are described and summarized. Briefly, this review introduces the research development of existing energy harvesting technologies, summarizes the technically difficult problems faced by piezoelectric energy harvesting technologies, and provides an outlook for future research and development trends of piezoelectric vibration energy harvesting technologies.

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Section: Application Of Energy Harvesting Technologymentioning

confidence: 99%

Piezoelectric vibration energy harvester: Operating mode, excitation type and dynamics

Zhou

Cui

et al. 2022

Advances in Mechanical Engineering

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“…Also, in an inverted flag configuration, a bluff body, e.g. a plate, a Y-shape or a cylinder can be attached to the free end of the beam to generate flow-driven fluctuating motions like flapping [10], snap-through [11] or galloping [12] for the purposes of wind energy harvesting based on piezoelectricity (if the cantilever is single-layered) [10,11] or triboelectricity (if the cantilever is multilayered) [10,12]. Adaptivity with respect to wind speed and direction can be added to inverted flag harvesters.…”

Section: Introductionmentioning

confidence: 99%

Adaptivity of a leaf-inspired wind energy harvester with respect to wind speed and direction

Sabzpoushan,

Woias

2024

Bioinspir. Biomim.

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Environmental wind is a random phenomenon in both speed and direction, though it can be forecasted to some extent. An example of that is a gust which is an abrupt, but short-time change in wind speed and direction. Being a free and clean source for small-scale energy scavenging, attraction of wind is rapidly growing in the world of energy harvesters. In this paper, a leaf-like flapping wind energy harvester is introduced as the base structure in which a short-span airfoil is attached to the free end of a double-deck cantilever beam. A flap mechanism inspired by scales on sharks’ skin and a tail mechanism inspired by birds’ horizontal tail are proposed for integration to the base harvester to make it adaptive with respect to wind speed and direction, respectively. The use of the flap mechanism increases the leaf flapping frequency by +2.1 to +11.5 Hz at wind speeds of 1.5 m/s to 6.0 m/s. Therefore, since the output power of a vibrational harvester is a function of vibration frequency, a figure of merit or an efficiency parameter related to the output power will increase, as well. On the other hand, if there is a misalignment between the harvester’s heading and wind direction due to change of the latter one, the harvesting performance deteriorates. Although the base harvester can realign in certain ranges of sideslip angle at each wind speed, when the tail mechanism is integrated into that, it broadens the range of realignable sideslip angles at all the investigated wind speeds by up to 80°.

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“…Numerical studies are also useful to determine the best arrangement of the harvester composed of several basic piezo elements, exposed to a varying external force [ 5 ] or to model the effect of geometry parameters over the output power in order to get handy formulas [ 6 , 7 ]. Piezoelectrics can also be exploited to directly harvest the energy of variable-speed wind by means of a dynamic multi-stable flutter harvester [ 8 ]. Additionally, the search for new materials showing piezoelectricity is active.…”

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confidence: 99%