Performance of a circular cylinder piezoelectric wind energy harvester fitted with a splitter plate

“…Song et al [58] considered that the energy harvester could no longer withstand large-amplitude vibration when the wind speed was high. In order to expand the energy harvesting adaptability to high wind speed range, they added a shunt plate behind the spoiler cylinder.…”

Section: Miniature Wind Energy Harvestersmentioning

confidence: 99%

“…The energy harvesting level of large equipment has increased from W to kW, and small equipment has gradually stabilized at the mW level. Advection wind energy, turbulent wind energy, liquid laminar current energy, wave energy, and other forms of energy have entered the scope of research [18,19,[53][54][55][56][57][58]61,74,[97][98][99]. Correspondingly, the kinetic energy and mechanical energy generated by flow motion have been effectively exploited and utilized.…”

Section: Summary Of the Current Situation And Problemsmentioning

confidence: 99%

Capturing Flow Energy from Ocean and Wind

et al. 2019

View full text Add to dashboard Cite

Flow-induced energy harvesting has attracted more and more attention among researchers in both fields of the wind and the fluid. Piezoelectric energy harvesters and triboelectric nanogenerators are exploited to obtain superior performance and sustainability, and the electromagnetic conversion has been continuously improved in the meantime. Aiming at different circumstances, researchers have designed, manufactured, and tested a variety of energy harvesters. In this paper, we analyze the state-of-the-art energy harvesting techniques and categorize them based on the working environment, application targets, and energy conversion mechanisms. The trend of research endeavors is analyzed, and the advantages, existing problems of energy harvesters, and corresponding solutions of energy harvesters are assessed.Energies 2019, 12, 2184 2 of 22 pose a potential threat to human health. The environmental threat is more obvious for one-off batteries, which are not intended for replacement and recycling, resulting in appreciable pollution problems [13]. Harvesting energy from the environment instead of carrying a chemical battery around is safer, undoubtedly, for both humans and the nature. Safety and universality make environmental energy harvesting an attractive topic. Relatively speaking, energy harvesting has advantages, as follows: (a) Battery-less operations are feasible, (b) embedded systems are easy to wire, (c) the infrastructure is easy to retrofit, (d) labor is saved, or "fit and forget" [14], and (e) the equipment is lightweight. Some long-term monitor systems with low power consumption, such as sensors for building structure health detection, body information collection, and low-energy self-maintenance systems [15] usually need long-term stable energy supply. In practical applications, ocean climate detectors have an option to take advantage of the ocean by using tidal energy or wave energy, and bridge safety monitors can be recharged by wind flow to suit local conditions. Thus, ubiquitous flow energy provides a good energy harvesting option toward self-powered systems.Energy harvesting from flow environments flourishes with the development of the energy industry along the general trend. Various forms of flow energy, such as wave, tidal, water current, wind flow have been exploited and utilized [16]. The mass level of large flow energy harvester can reach 2 × 10 5 kg, where the energy harvesting magnitude can reach 18.2 KW [17]. Flow energy harvesters can also be minimized as small as a few centimeters and indicate energy harvesting density as 1-10 mW [18,19]. A variety of energy harvesters have been developed based on different energy conversion mechanisms. Among them, the large-scale electromagnetic energy harvester relies on large generators, suffering from complex structures [20]. The approach can produce energy in large magnitudes and can generate electricity feeding the grid for the industrial production process and daily life use. As for triboelectric nanogenerators (TENG) and piezoelectric energy harvesters ...

show abstract

“…The transient response of the piezoelectric beam subjected to an impulse pressure was obtained, and the relationship between the output voltage and the excitation frequency was analyzed. Song et al 19 used wind tunnel experiments to examine the performance of a piezoelectric wind energy harvester placed in the near wake of a circular cylinder. Orrego et al 20 performed an experimental study on the wind energy harvesting by self‐sustained oscillations (flutter) of a flexible piezoelectric membrane (flag).…”

Section: Introductionmentioning

confidence: 99%

Analytical and numerical fluid–structure interaction study of a microscale piezoelectric wind energy harvester

2020

View full text Add to dashboard Cite

In this paper, an analytical approach and two numerical models have been developed to study an energy-harvesting device for micropower generation. This device uses wind energy to oscillate a cantilevered beam attached to a piezoelectric layer for generating electric energy output. The analytical approach and the first numerical model consider the fluid-structure interaction phenomenon in the harvester performance.The equations governing beam oscillations and airflow have been coupled to a set of four differential equations in the analytical approach. This set of equations has been solved to determine the beam deflection and the air pressure variation with time.The numerical methods have been conducted by employing a commercial software.The results of the analytical method and the first numerical model have been compared in different working conditions, and their credibility has been discussed. In the second numerical model, the electromechanical performance of the piezoelectric material has also been incorporated in the harvester device analysis. This model has been verified against experimental data for the output voltage and power of the device available in the literature. Finally, the effect of different geometrical parameters has been studied on the harvester performance, and suggestions have been made to improve the harvester efficiency. K E Y W O R D Sanalytical and numerical approaches, fluid-structure interaction, microscale, piezoelectric wind energy harvester | INTRODUCTIONMicroelectronic and micromechanical systems such as wireless sensor networks, biomedical implantable devices, and health monitoring systems have gained extensive interest for various applications in the research community and industrial field. 1,2 These systems normally use batteries to provide electrical energy required for their operation. However, the need for regularly replacing or recharging batteries makes their application costly and cumbersome. Due to these concerns, technologies capable of generating electrical power by harvesting environmental energy have been considered as a promising alternative for batteries, especially for autonomous devices operating for long periods with no human intervention, 3-6 and various types of such technologies have been developed for harvesting energy from different sources like solar power, thermal gradients, mechanical vibrations, and air and water flows. 7,8 Airflow or wind is a renewable and green energy source widely available in many situations where microsystems are installed like heating, ventilation and air conditioning systems, road and mining tunnels, and moving objects. In a comprehensive study, Watson et al. provided an expert view of emerging technologies within the wind energy sector considering their potential, challenges, and applications. For each technology, an

show abstract

Performance of a circular cylinder piezoelectric wind energy harvester fitted with a splitter plate

Cited by 78 publications

References 42 publications

Multiple lock-ins in vortex-induced vibration of a filament

Multiple lock-ins in vortex-induced vibration of a filament

Capturing Flow Energy from Ocean and Wind

Analytical and numerical fluid–structure interaction study of a microscale piezoelectric wind energy harvester

Contact Info

Product

Resources

About