A Numerical Approach for Flexoelectric Energy Harvester Modeling Using COMSOL Multiphysics

2021 ◽  
Author(s):  
XJ Li ◽  
J Sun ◽  
ML Pu ◽  
GS Wu
Keyword(s):  
Energy Harvester ◽  
Numerical Approach ◽  
Comsol Multiphysics

scholarly journals A new circular spinneret system for electrospinning numerical approach and electric field optimization

2019 ◽  
Vol 23 (4) ◽  
pp. 2229-2235 ◽  
Author(s):  
Ziming Zhu ◽  
Han Wang ◽  
Guojie Xu ◽  
Rouxi Chen ◽  
Lixiong Huang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Finite Element ◽  
Electric Field ◽  
Large Scale ◽  
Energy Harvester ◽  
Wearable Sensors ◽  
Element Model ◽  
Numerical Approach ◽  
Electrospinning Process ◽  
Effective Technique

Electrospinning is believed to be the most effective technique to produce microfibers or nanofibers at large scale, which can be applied in various hightech areas, including energy harvester, tissue engineering, and wearable sensors. To enhance nanofiber throughput during a multi-needle electrospinning process, it is an effective way to keep the electric field uniform by optimizing electrospinning spinnerets. For this purpose, a novel circular spinneret system is designed and optimized numerically by a 3-D finite element model, the optimal collector shape is also obtained.

scholarly journals Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

2018 ◽  
Vol 210 ◽  
pp. 02053
Author(s):  
Zdeněk Machů ◽  
Zdeněk Majer ◽  
Oldřich Ševeček ◽  
Kateřina Štegnerová ◽  
Zdeněk Hadaš
Keyword(s):  
Energy Harvesting ◽  
Energy Harvester ◽  
Mechanical Energy ◽  
Numerical Approach ◽  
Mechanical Analysis ◽  
Individual Layer ◽  
Vibration Energy Harvester ◽  
Ultra Low Power ◽  
Beam Design ◽  
Harvesting Systems

This paper addresses an important issue of the individual layer thickness influence in a multilayer piezo composite on electro-mechanical energy conversion. The use of energy harvesting systems seems to be very promising for applications such as ultra-low power electronics, sensors and wireless communication. The energy converters are often disabled due to a failure of the piezo layer caused by an excessive deformation/stresses occurring upon the operation. It is thus desirable to increase both reliability and efficiency of the electromechanical conversion as compared to standard concepts. The proposed model of the piezoelectric vibration energy harvester is based on a multilayer beam design with active piezo and protective ceramic layers. This paper presents results of a comparative study of an analytical and numerical approach used for the electro-mechanical simulations of the multilayer energy harvesting systems. Development of the functional analytical model is crucial for the further optimization of new (smart material based) energy harvesting systems, since it provides much faster response than the numerical model.

Design, Simulation & Optimization of a MEMS Based Piezoelectric Energy Harvester

2021 ◽  
Vol 12 (07) ◽  
pp. 318-329
Author(s):  
Indrajit Chandra Das ◽  
Md. Arafat Rahman ◽  
Sanjoy Dam
Keyword(s):  
Finite Element Method ◽  
Energy Harvesting ◽  
Energy Harvester ◽  
Proof Mass ◽  
Simulation Optimization ◽  
Electrical Energy ◽  
Comsol Multiphysics ◽  
Piezoelectric Energy Harvesting ◽  
The Finite Element Method ◽  
Piezoelectric Energy

Energy harvesting is defined as a process of acquiring energy surrounding a system and converting it into electrical energy for usage. Piezoelectric energy harvesting is a very important concept in energy harvesting in microelectronics. In this report, an analysis of the cantilever type piezoelectric energy harvester is conducted using the finite element method (FEM) based software COMSOL Multiphysics. A unimorph type cantilever beam of the silicon substrate, structural steel as proof mass and support, and PZT-5A material as piezoelectric constitute the physical system.

Effect of angle of attack on an optimized vortex induced vibrated energy harvester: A numerical approach

2016 ◽  
Author(s):  
Md. Rejaul Haque ◽  
M. Arshad Zahangir Chowdhury ◽  
Anjan Goswami
Keyword(s):  
Energy Harvester ◽  
Angle Of Attack ◽  
Numerical Approach

Joint Characteristic Effect on the Performance of Nonlinear Piezoelectric Energy Harvesters

2016 ◽  
Author(s):  
Kamal Jahani ◽  
Parisa Aghazadeh
Keyword(s):  
Energy Harvester ◽  
Lagrange Equation ◽  
Equations Of Motion ◽  
Maximum Output Power ◽  
Excitation Frequency ◽  
Numerical Approach ◽  
Maximum Output ◽  
Piezoelectric Energy ◽  
Joint Characteristic ◽  
Tip Mass

In this work, the effects of joint characteristics on the performance of a nonlinear piezoelectric energy harvester are investigated numerically. Large amplitude deflection unimorph beam with a tip mass and a nonlinear piezoelectric layer is considered as an energy harvester. By applying Euler-Lagrange equation and the Gauss’s law, mechanical and electrical equations of motion are obtained respectively, under two scenarios, i.e. with an ideal (rigid) joint and with a flexible one. A numerical approach is followed to investigate the effects of each nonlinear parameter of the harvester (stiffness, damping and piezoelectric coefficient) on harvested power. Results show that considering ideal joint between harvester and base structure leads to overestimating the maximum output power and the range of effective excitation frequency.

Vibration-Based Electromagnetic Energy Harvester

2010 ◽  
Author(s):  
Farid Khan ◽  
Farrokh Sassani ◽  
Boris Stoeber
Keyword(s):  
Energy Harvester ◽  
Open Circuit Voltage ◽  
Low Cost ◽  
Load Resistance ◽  
Open Circuit ◽  
Comsol Multiphysics ◽  
Mass System ◽  
Electromagnetic Power ◽  
The Magnetic Field ◽  
Magnetostatic Analysis

This paper presents the simulation, fabrication, and experimental results of a vibration-based electromagnetic power (EMPG) generator. A novel, low cost, one mask technique is used to fabricate the planar coils and the planar spring. This fabrication technique can provide an alternative for processes such as Lithographie Galvanoformung Abformung (LIGA) or SU-8 molding and MEMS electroplating. Commercially available copper foils of 20 μm and 350 μm thicknesses are used for the planar coils and planar spring, respectively. The design with planar coils on either side of the magnets provides enhanced power generation for the same footprint of the device. The device overall size is 1 cm3. Simulations of the modal analysis of the spring-mass system and the magnetostatic analysis of the magnetic field generated by the magnets are performed with COMSOL multiphysics®. Excitation of the EMPG at the fundamental frequency of 371 Hz and at 13.5 g base acceleration (base amplitude 24.4 μm) yields an open circuit voltage of 60.1 mV, as well as 46.3 mV load voltage and 10.7 μW power for a 100 Ω load resistance. At matching impedance of 7.5 Ω the device produced a maximum power of 23.56 μW and a power density of 23.56 μW/cm3.

scholarly journals Geometry and shape optimization of piezoelectric cantilever energy harvester using COMSOL multiphysics software

2021 ◽  
Author(s):  
Ahmed A. Hashim ◽  
Khalil I. Mahmoud ◽  
Hussein M. Ridha
Keyword(s):  
Embedded Systems ◽  
Cross Section ◽  
Energy Harvester ◽  
Comsol Multiphysics ◽  
Trapezoidal Cross Section ◽  
Piezoelectric Cantilever ◽  
Cantilever Structure ◽  
Section Design ◽  
Improvement Method ◽  
Piezoelectric Cantilevers

AbstractIn embedded systems that necessarily require a steady source of power and (or) attaches to a sensor(s), there are opportunities to mix small batteries to supply such power. The aim of this research is to optimize the geometry and shape of piezoelectric cantilevers to harvest more power. Several piezoelectric cantilever geometries with various shapes (rectangular, triangular, circular, and trapezoidal cross section) are tested in COMSOL multiphysics simulator to find the best geometry that provides the highest accomplishable power. The most efficient geometry was found to be conferred by the trapezoidal, cross section cantilever. Next, another improvement method was applied to maximize the harvested power of the cantilever by modifying the shape of the trapezoidal cantilever structure through increasing the number of its faces. The results demonstrated that the highest output power (36 mW) was produced by the four faces, trapezoidal cross section design of cantilever.

Simply supported FPEDs connected by springs for broadband energy harvesting

2020 ◽  
Vol 64 (1-4) ◽  
pp. 201-210
Author(s):  
Yoshikazu Tanaka ◽  
Satoru Odake ◽  
Jun Miyake ◽  
Hidemi Mutsuda ◽  
Atanas A. Popov ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Evaluation Method ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Functional Materials ◽  
Vibration Energy ◽  
Theoretical Evaluation ◽  
Vibration Energy Harvester ◽  
Polyvinylidene Difluoride ◽  
Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

Vibration based Energy Harvester Employing ZnO Film on the Stainless Steel Substrate

2013 ◽  
Vol 133 (4) ◽  
pp. 126-127 ◽  
Author(s):  
Shota Hosokawa ◽  
Motoaki Hara ◽  
Hiroyuki Oguchi ◽  
Hiroki Kuwano
Keyword(s):  
Stainless Steel ◽  
Energy Harvester ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Zno Film

An Electret-based Implantable Energy Harvester with Liquid Cells (MEMS vs. 3D Printing Fabrication)

2018 ◽  
Vol 138 (9) ◽  
pp. 401-405
Author(s):  
Yu-Fan Chen ◽  
Satoshi Inoue ◽  
Hiroshi Toshiyoshi
Keyword(s):  
3D Printing ◽  
Energy Harvester
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