scholarly journals Analysis of Energy Harvesting Enhancement in Piezoelectric Unimorph Cantilevers

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8463
Author(s):  
Mohammad Rahimzadeh ◽  
Hamid Samadi ◽  
Nikta Shams Mohammadi
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Materials ◽  
Considerable Effect ◽  
Small Scale ◽  
Physical Parameters ◽  
Energy Harvesters ◽  
Area Of Interest ◽  
Functional Efficiency ◽  
Major Operation ◽  
Harvesting Process

Environmental energy harvesting is a major operation in research and industries. Currently, researchers have started analyzing small-scale energy scavengers for the supply of energy in low-power electrical appliances. One area of interest is the use of piezoelectric materials, especially in the presence of mechanical vibrations. This study analyzed a unimorph cantilever beam in different modes by evaluating the effects of various parameters, such as geometry, piezoelectric material, lengths of layers, and the proof mass to the energy harvesting process. The finite element method was employed for analysis. The proposed model was designed and simulated in COMSOL Multiphysics, and the output parameters, i.e., natural frequencies and the output voltage, were then evaluated. The results suggested a considerable effect of geometrical and physical parameters on the energy harvesters and could lead to designing devices with a higher functional efficiency.

Load-Tolerant, High-Efficiency Self-Powered Energy Harvesting Scheme Using a Nonlinear Approach

2014 ◽  
Vol 1 (3-4) ◽  
Author(s):  
Mickaël Lallart ◽  
Claude Richard ◽  
Yang Li ◽  
Yi-Chieh Wu ◽  
Daniel Guyomar
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Piezoelectric Materials ◽  
Small Scale ◽  
Energy Scavenging ◽  
Resistive Load ◽  
Vibration Energy Harvesting ◽  
New Approach ◽  
Nonlinear Approach ◽  
Self Powered

AbstractSmall-scale energy harvesting has become a particularly hot topic for replacing batteries in autonomous or nomad systems. In particular, vibration energy harvesting using piezoelectric elements has experienced a significant amount of research over the last decade as vibrations are widely available in many environments and as piezoelectric materials can be easily embedded. However, the energy scavenging abilities of such systems are still limited and are very sensitive to the connected load. The purpose of this paper is to expose a new approach based on synchronous switching on resistive load, which allows both a significant enhancement of the energy harvesting capabilities as well as a high tolerance to a change of the impedance of the connected system, especially in the low value region. It is theoretically and experimentally shown that such an approach permits increasing the energy harvesting abilities by a factor 4 compared to classical DC energy harvesting approach. Furthermore, the self-powering possibility and automatic load adaptation of the proposed method is experimentally discussed, showing the realistic viability of the technique.

scholarly journals The State-of-the-Art Brief Review on Piezoelectric Energy Harvesting from Flow-Induced Vibration

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Hongjun Zhu ◽  
Tao Tang ◽  
Huohai Yang ◽  
Junlei Wang ◽  
Jinze Song ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Bluff Body ◽  
Mechanical Energy ◽  
Wake Flow ◽  
Structural Vibration ◽  
Small Scale ◽  
Flow Induced Vibration ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Self Powered

Flow-induced vibration (FIV) is concerned in a broad range of engineering applications due to its resultant fatigue damage to structures. Nevertheless, such fluid-structure coupling process continuously extracts the kinetic energy from ambient fluid flow, presenting the conversion potential from the mechanical energy to electricity. As the air and water flows are widely encountered in nature, piezoelectric energy harvesters show the advantages in small-scale utilization and self-powered instruments. This paper briefly reviewed the way of energy collection by piezoelectric energy harvesters and the various measures proposed in the literature, which enhance the structural vibration response and hence improve the energy harvesting efficiency. Methods such as irregularity and alteration of cross-section of bluff body, utilization of wake flow and interference, modification and rearrangement of cantilever beams, and introduction of magnetic force are discussed. Finally, some open questions and suggestions are proposed for the future investigation of such renewable energy harvesting mode.

scholarly journals Development of Smart Shoes Using Piezoelectric Material

2021 ◽  
Vol 7 (1) ◽  
pp. 49-55
Author(s):  
Affa Rozana Abdul Rashid ◽  
Nur Insyierah Md Sarif ◽  
Khadijah Ismail
Keyword(s):  
Piezoelectric Material ◽  
Alternative Energy ◽  
Piezoelectric Materials ◽  
Mechanical Energy ◽  
Electronic Devices ◽  
Electrical Energy ◽  
Small Scale ◽  
Power Electronic ◽  
Energy Harvesters ◽  
Almost All

The consumption of low-power electronic devices has increased rapidly, where almost all applications use power electronic devices. Due to the increase in portable electronic devices’ energy consumption, the piezoelectric material is proposed as one of the alternatives of the significant alternative energy harvesters. This study aims to create a prototype of “Smart Shoes” that can generate electricity using three different designs embedded by piezoelectric materials: ceramic, polymer, and a combination of both piezoelectric materials. The basic principle for smart shoes’ prototype is based on the pressure produced from piezoelectric material converted from mechanical energy into electrical energy. The piezoelectric material was placed into the shoes’ sole, and the energy produced due to the pressure from walking, jogging, and jumping was measured. The energy generated was stored in a capacitor as piezoelectric material produced a small scale of energy harvesting. The highest energy generated was produced by ceramic piezoelectric material under jumping activity, which was 1.804 mJ. Polymer piezoelectric material produced very minimal energy, which was 55.618 mJ. The combination of both piezoelectric materials produced energy, which was 1.805 mJ from jumping activity.

scholarly journals Vibration energy harvesting: A review

2019 ◽  
Vol 09 (04) ◽  
pp. 1930001 ◽  
Author(s):  
Anwesa Mohanty ◽  
Suraj Parida ◽  
Rabindra Kumar Behera ◽  
Tarapada Roy
Keyword(s):  
Energy Harvesting ◽  
Small Scale ◽  
Recent Past ◽  
Vibration Energy Harvesting ◽  
Power Sources ◽  
Energy Harvesters ◽  
Portable Power ◽  
Different Types ◽  
Energy Harvesting System ◽  
Energy Harvesting Devices

This study is based on energy harvesting from vibration and deals with the comparison of different techniques. In the present scenario, energy harvesting has drawn the attention of researchers due to a rapid increase in the use of wireless and small-scale devices. So, there is a huge thirst among scientists to develop permanent portable power sources. In the surroundings, a lot of unutilized energy is wasted which can be collected and used for power generation. Research works have been extensively carried out to develop energy harvesting devices catering to the increasing needs of being efficient and economical. Effective energy harvesting mainly depends on the design of the transducer. Different types of design techniques, material properties, and availability of energy harvesters are reviewed in this paper. The paper aims to explore the advantages and limitations of different energy harvesting principles, advances, and findings of the recent past. This study also discusses some of the key ideas for the enhancement of power output. This paper provides a broad view of the energy harvesting system to the learners, which will facilitate them to design more efficient energy harvesting devices by using different principles.

Small Wind Energy Harvesting From Galloping Using Piezoelectric Materials

2012 ◽  
Author(s):  
Liya Zhao ◽  
Lihua Tang ◽  
Yaowen Yang
Keyword(s):  
Wind Tunnel ◽  
Energy Harvesting ◽  
Wind Energy ◽  
Cross Sections ◽  
Significant Influence ◽  
Systematic Study ◽  
Piezoelectric Materials ◽  
Energy Harvesters ◽  
Peak Output Power ◽  
Piezoelectric Harvester

A galloping piezoelectric harvester for small wind energy harvesting usually consists of a cantilever beam clamped at one end and a tip body attached to its free end. The tip body has significant influence on the aeroelastic characteristic of the harvester thus the efficiency of energy harvesting. However, no systematic study on the tip body is available in the literature. This article focuses on the effect of tip body on the performance of the harvester. A prototype device is fabricated with different tip bodies having various cross sections, lengths, and masses. Wind tunnel tests are conducted to determine the influence of these parameters on the power generated. A peak output power of 8.4 mW is achieved at a wind velocity of 8 m/s for the harvester with a tip of square section. An analytical model integrating electromechanical and aerodynamic formulations is established, and the results agree well with the experiments. It is recommended that the tip of square section should be used for galloping energy harvesters.

Evaluation of Ring-Type Energy Harvesters

2011 ◽  
Author(s):  
S. D. Hu ◽  
H. Li ◽  
H. S. Tzou
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Layer ◽  
Piezoelectric Materials ◽  
Electrical Energy ◽  
Basic Structure ◽  
Open Circuit ◽  
Ambient Vibration ◽  
Practical Applications ◽  
Energy Harvesters ◽  
Segment Size

Piezoelectric materials can be used as electromechanical conversion mechanisms to transfer ambient vibration into electrical energy to power electronic devices. In this study, an elastic ring laminated with a piezoelectric layer on the inner surface is utilized as the basic structure for energy harvesting. The piezoelectric layer is uniformly segmented into several energy harvesting patches for practical applications. The generated electrical energy resulting from modal voltages is analyzed under the open-circuit condition. Two modal energy generations are evaluated: one is the energy induced by the membrane oscillation and the other is the energy induced by the bending oscillation. For practical design applications, energy generations are evaluated with respect to ring radius, piezoelectric layer thickness, ring thickness and segment size. The maximal energy of all harvester patches on the ring is calculated to determine the optimal patch locations with respect to various ring modes. By summing up energies generated from all harvesters on the ring, the overall energy is also evaluated Based on the normalizations and assumptions of parameters, results indicate that the larger the segment size is, the less the energy can be generated.

Energy Harvesting From Aeroelastic Instabilities for Highly Flexible Aircraft

2014 ◽  
Author(s):  
Zahra Sotoudeh
Keyword(s):  
Energy Harvesting ◽  
Smart Materials ◽  
Vibrational Energy ◽  
Piezoelectric Materials ◽  
The Body ◽  
Limit Cycle Oscillation ◽  
Beam Model ◽  
Cross Sectional ◽  
Energy Harvesters ◽  
Cycle Oscillation

Aeroelastic instabilities such as flutter, limit cycle oscillation (LCO), and divergence are traditionally considered undesirable. Designers try to avoid these instabilities by adding enough stiffness or damping to structures. A new approach to suppressing these instabilities is to use smart material to harvest energy from airflow. In this way not only are the aeroelastic instabilities avoided, but also some energy will be harvested. The harvested energy can be used for powering sensors, morphing parts of the structure, and ultimately increasing the performance of the aircraft. Energy harvesting from aeroelastic phenomena can also be used in designing small wind energy harvesters for home use. In this paper we will explore both capabilities. Piezoelectric materials are among the attractive smart materials for energy harvesting. Piezoelectric materials generate electric potential as they deform. We will explore the use of these materials in aeroelastic harvesting. Ref. 1 has a general overview of different forms of vibrational energy harvesting, including the use of piezoelectric materials. Harvesting energy from aeroelastic instabilities is a relatively new area; therefore, the body of literature on this subject is relatively young. Most of the analysis is limited to a 2-D cross-sectional analysis with steady or quasi-steady flow. We will use a 2-D model with an unsteady aerodynamic model as the preliminary result. More realistic cases with a beam model will be added to the final version of the paper. For the beam model, we will use fully intrinsic equations.

scholarly journals A Review on Piezoelectric Energy Harvesting: Materials, Methods, and Circuits

2019 ◽  
Vol 4 (1) ◽  
pp. 3-39 ◽  
Author(s):  
Shashank Priya ◽  
Hyun-Cheol Song ◽  
Yuan Zhou ◽  
Ronnie Varghese ◽  
Anuj Chopra ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Power Management ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Low Frequency ◽  
Small Scale ◽  
Piezoelectric Energy Harvesting ◽  
Wide Bandwidth ◽  
Piezoelectric Energy ◽  
Continuous Power

Abstract Piezoelectric microelectromechanical systems (PiezoMEMS) are attractive for developing next generation self-powered microsystems. PiezoMEMS promises to eliminate the costly assembly for microsensors/microsystems and provide various mechanisms for recharging the batteries, thereby, moving us closer towards batteryless wireless sensors systems and networks. In order to achieve practical implementation of this technology, a fully assembled energy harvester on the order of a quarter size dollar coin (diameter=24.26 mm, thickness=1.75 mm) should be able to generate about 100 μW continuous power from low frequency ambient vibrations (below 100 Hz). This paper reviews the state-of-the-art in microscale piezoelectric energy harvesting, summarizing key metrics such as power density and bandwidth of reported structures at low frequency input. This paper also describes the recent advancements in piezoelectric materials and resonator structures. Epitaxial growth and grain texturing of piezoelectric materials is being developed to achieve much higher energy conversion efficiency. For embedded medical systems, lead-free piezoelectric thin films are being developed and MEMS processes for these new classes of materials are being investigated. Non-linear resonating beams for wide bandwidth resonance are also reviewed as they would enable wide bandwidth and low frequency operation of energy harvesters. Particle/granule spray deposition techniques such as aerosol-deposition (AD) and granule spray in vacuum (GSV) are being matured to realize the meso-scale structures in a rapid manner. Another important element of an energy harvester is a power management circuit, which should maximize the net energy harvested. Towards this objective, it is essential for the power management circuit of a small-scale energy harvester to dissipate minimal power, and thus it requires special circuit design techniques and a simple maximum power point tracking scheme. Overall, the progress made by the research and industrial community has brought the energy harvesting technology closer to the practical applications in near future.

scholarly journals Towards Bio-Hybrid Energy Harvesting in the Real-World: Pushing the Boundaries of Technologies and Strategies Using Bio-Electrochemical and Bio-Mechanical Processes

2021 ◽  
Vol 11 (5) ◽  
pp. 2220
Author(s):  
Abanti Shama Afroz ◽  
Donato Romano ◽  
Francesco Inglese ◽  
Cesare Stefanini
Keyword(s):  
Fuel Cells ◽  
Energy Harvesting ◽  
Microbial Fuel Cells ◽  
Large Scale ◽  
Green Energy ◽  
Future Research ◽  
Small Scale ◽  
Power Sources ◽  
Energy Harvesters ◽  
Living Organisms

Sustainable, green energy harvesting has gained a considerable amount of attention over the last few decades and within its vast field of resources, bio-energy harvesters have become promising. These bio-energy harvesters appear in a wide variety and function either by directly generating energy with mechanisms similar to living organisms or indirectly by extracting energy from living organisms. Presently this new generation of energy harvesters is fueling various low-power electronic devices while being extensively researched for large-scale applications. In this review we concentrate on recent progresses of the three promising bio-energy harvesters: microbial fuel cells, enzyme-based fuel cells and biomechanical energy harvesters. All three of these technologies are already extensively being used in small-scale applications. While microbial fuel cells hold immense potential in industrial-scale energy production, both enzyme-based fuel cells and biomechanical energy harvesters show promises of becoming independent and natural power sources for wearable and implantable devices for many living organisms including humans. Herein, we summarize the basic principles of these bio-energy harvesting technologies, outline their recent advancements and estimate the near future research trends.

Hybrid Energy Harvesting Using Electroactive Polymers Combined with Piezoelectric Materials

2014 ◽  
Vol 96 ◽  
pp. 117-123 ◽  
Author(s):  
Alexandru Cornogolub ◽  
Pierre Jean Cottinet ◽  
Lionel Petit
Keyword(s):  
Energy Harvesting ◽  
Electric Field ◽  
Large Deformations ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Electroactive Polymers ◽  
Hybrid Energy ◽  
Energy Harvesters ◽  
High Elasticity ◽  
Hybrid Energy Harvesting

Electroactive polymers (EAP) are relatively soft and flexible materials, easy to integrate and able to undergo large deformations by applying an electric field (usually some 10 V/μm). This coupling between strain and electric field (quadratic by nature) as well as particular mechanical properties have already been used advantageously to design actuators. As energy harvesters, EAP have also shown good abilities by providing energy densities up to 0.4 J/g/cycle (generator integrated in a shoe). Moreover, they present some advantages over other techniques as electromagnetic or piezoelectric as they have low resonance frequency response and high elasticity which enable them to be used in situations where large displacements are available. The main drawback of EAP as energy harvesters is that they don't experience direct coupling between strain and electric field, such as the piezoelectric effect. It is therefore essential to use an external electrical polarization source in order to create energy cycles induced by the EAP capacitance variations when it is subject to external stress. The goal of this work is to combine the EAP and piezoelectric materials using the advantages of both, for a hybrid energy harvesting. Different possible configurations and their performances are studied and a comparison with existing techniques is made.

Sign in / Sign up

Export Citation Format

Share Document