Power density ratio optimization of bimorph piezocomposite energy harvesters using a Multidisciplinary Design Feasible method

2017 ◽  
Vol 165 ◽  
pp. 171-179 ◽  
Author(s):  
A. Esmaeili ◽  
J.M.M. Sousa
Keyword(s):  
Power Density ◽  
Density Ratio ◽  
Multidisciplinary Design ◽  
Feasible Method ◽  
Energy Harvesters ◽  
Ratio Optimization

scholarly journals Power Density Improvement of Piezoelectric Energy Harvesters via a Novel Hybridization Scheme with Electromagnetic Transduction

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 803
Author(s):  
Zhongjie Li ◽  
Chuanfu Xin ◽  
Yan Peng ◽  
Min Wang ◽  
Jun Luo ◽  
...  
Keyword(s):  
Power Density ◽  
Output Power ◽  
Energy Harvester ◽  
Hybrid Energy ◽  
Energy Harvesters ◽  
Piezoelectric Patch ◽  
Piezoelectric Energy ◽  
Electromagnetic Transduction ◽  
Self Powered ◽  
Power Densities

A novel hybridization scheme is proposed with electromagnetic transduction to improve the power density of piezoelectric energy harvester (PEH) in this paper. Based on the basic cantilever piezoelectric energy harvester (BC-PEH) composed of a mass block, a piezoelectric patch, and a cantilever beam, we replaced the mass block by a magnet array and added a coil array to form the hybrid energy harvester. To enhance the output power of the electromagnetic energy harvester (EMEH), we utilized an alternating magnet array. Then, to compare the power density of the hybrid harvester and BC-PEH, the experiments of output power were conducted. According to the experimental results, the power densities of the hybrid harvester and BC-PEH are, respectively, 3.53 mW/cm3 and 5.14 μW/cm3 under the conditions of 18.6 Hz and 0.3 g. Therefore, the power density of the hybrid harvester is 686 times as high as that of the BC-PEH, which verified the power density improvement of PEH via a hybridization scheme with EMEH. Additionally, the hybrid harvester exhibits better performance for charging capacitors, such as charging a 2.2 mF capacitor to 8 V within 17 s. It is of great significance to further develop self-powered devices.

Flexible hybrid piezo/triboelectric energy harvester with high power density workable at elevated temperatures

2020 ◽  
Vol 8 (24) ◽  
pp. 12003-12012 ◽  
Author(s):  
Yanhua Sun ◽  
Yun Lu ◽  
Xiaoning Li ◽  
Zheyin Yu ◽  
Shujun Zhang ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Energy Harvester ◽  
Elevated Temperatures ◽  
Mechanical Energy ◽  
Broad Temperature Range ◽  
High Power Density ◽  
Temperature Range ◽  
Energy Harvesters ◽  
High Output

Eco-friendly energy harvesters with high output for effectively harvesting mechanical energy over a broad temperature range.

Design and Simulation of a PAM Based Bionic Elbow Joint

2013 ◽  
Vol 461 ◽  
pp. 589-596
Author(s):  
Li Na Hao ◽  
Chao Qun Xiang ◽  
Yuan Peng ◽  
Xiao Yu Xu ◽  
Qi Long Wang
Keyword(s):  
Power Density ◽  
Elbow Joint ◽  
Density Ratio ◽  
Artificial Muscle ◽  
Forward Kinematics ◽  
Pneumatic Artificial Muscle ◽  
Kinematics Analysis ◽  
Transmission Part ◽  
Structure Scheme ◽  
Simulation Results

A bionic elbow joint driven by motor is lack of flexibility. So a good option is to improve the flexible and power density ratio. This paper has designed a 3-DOF bionic elbow joint based on pneumatic artificial muscle, and the simulation and forward kinematics analysis have been done. The simulation results show that the structure scheme is feasible, and the movement is smooth. This structure can improve the generalization of the bionic joint and then lay a foundation in the serialization and standardization of the transmission part.

scholarly journals Multidisciplinary Design Optimization of the Actuation System of a Hybrid Electric Aircraft Powertrain

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1297
Author(s):  
Matthieu Pettes Duler ◽  
Xavier Roboam ◽  
Bruno Sareni ◽  
Yvan Lefevre ◽  
Jean-François Llibre ◽  
...  
Keyword(s):  
Design Optimization ◽  
Power Density ◽  
Multidisciplinary Design Optimization ◽  
High Speed ◽  
Multidisciplinary Design ◽  
Internal Cooling ◽  
Design Constraints ◽  
Actuation System ◽  
Hybrid Electric ◽  
Capacitance Effects

In the context of hybrid electric and full electric powertrains for future less-pollutant aircrafts, this paper focuses on the multidisciplinary design optimization (MDO) of the actuation system, including a surface-mounted PMSM in order to maximize the power density of the device: this study is a preliminary approach before integrating the whole powertrain. After an introduction of the MDO context, the analytical model of the electric motor is detailed. It integrates multi-physical aspects (electric, magnetic, mechanical, thermal, partial discharges and insulation, control and flight mission) and takes several heterogeneous design constraints into account. The optimization method involves a genetic algorithm allowing the reduction of the actuation weight with regard to a wide set of constraints. The results show the crucial sensitivity of the electro-thermal coupling, especially the importance of transient modes during flight sequences due to thermal capacitance effects. Another major point is related to the performance of the thermal cooling, which requires the introduction of an “internal cooling” in the stator slots in addition to the “base cooling” for stator and rotor. Gathering these analyses, the MDO leads to high power density actuators beyond 15 kW/kg with high-voltage–high-speed solutions, satisfying all design constraints (insulation, thermal, magnet demagnetization) over the flight mission.

scholarly journals Medical Radioisotope Production in a Power-Flattened ADS Fuelled with Uranium and Plutonium Dioxides

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Gizem Bakır ◽  
Saltuk Buğra Selçuklu ◽  
Hüseyin Yapıcı
Keyword(s):  
Power Density ◽  
Density Ratio ◽  
Target Material ◽  
Fuel Mixture ◽  
Carbon Composite ◽  
Production Performance ◽  
Radioisotope Production ◽  
Spent Fuel ◽  
Medical Radioisotope ◽  
Fission Power

This study presents the medical radioisotope production performance of a conceptual accelerator driven system (ADS). Lead-bismuth eutectic (LBE) is selected as target material. The subcritical fuel core is conceptually divided into ten equidistant subzones. The ceramic (natural U, Pu)O2fuel mixture and the materials used for radioisotope production (copper, gold, cobalt, holmium, rhenium, thulium, mercury, palladium, thallium, molybdenum, and yttrium) are separately prepared as cylindrical rods cladded with carbon/carbon composite (C/C) and these rods are located in the subzones. In order to obtain the flattened power density, percentages of PuO2in the mixture of UO2and PuO2in the subzones are adjusted in radial direction of the fuel zone. Time-dependent calculations are performed at 1000 MW thermal fission power (Pth) for one hour using the BURN card. The neutronic results show that the investigated ADS has a high neutronic capability, in terms of medical radioisotope productions, spent fuel transmutation and energy multiplication. Moreover, a good quasiuniform power density is achieved in each material case. The peak-to-average fission power density ratio is in the range of 1.02–1.28.

scholarly journals Modeling, Simulation and Optimization of Piezoelectric Bimorph Transducer for Broadband Vibration Energy Harvesting in Multi-Beam and Trapezoidal Approach

2018 ◽  
Vol 7 (2) ◽  
pp. 26 ◽  
Author(s):  
Nan Chen ◽  
Vishwas Bedekar
Keyword(s):  
Power Density ◽  
Energy Harvester ◽  
Vibration Energy Harvesting ◽  
Simulation And Optimization ◽  
Energy Harvesters ◽  
Trapezoidal Shape ◽  
Beam Design ◽  
Polycrystalline Ceramic ◽  
Series Configuration ◽  
Polycrystalline Ceramic Material

The objective of the research is to design a broadband energy harvester device through the multi-beam approach and non-linear trapezoidal geometry approach. The performance of the composite piezoelectric PZT-PZN polycrystalline ceramic material is simulated using COMSOL Multiphysics, and results are compared using series configuration of a composite bimorph energy harvester which vibrates at its 1st fundamental frequency. We chose a five cantilever multibeam harvester to demonstrate that individual fundamental modes of the beams can achieve a broader frequency band and generate power. Authors also show that composite trapezoidal beam design leads to high power density broadband frequency response. The multibeam approach resulted in broader bandwidth of 18 Hz while generating a power density of 0.0913 mW/cm3 whereas the trapezoidal shape generated 2.3 – 2.5 mW/cm3 with a bandwidth of 4 to 6 Hz. Authors believe that these results could help design broadband energy harvesters to enhance power density as well as bandwidth.

Experimental Investigation of Coil Thickness in Electromagnetic Energy Harvesters for Power Density Improvement

2021 ◽  
pp. 1078-1091
Author(s):  
Yan Peng ◽  
Lan Zhang ◽  
Zhongjie Li ◽  
Jun Luo ◽  
Shaorong Xie ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Power Density ◽  
Electromagnetic Energy ◽  
Energy Harvesters

scholarly journals Design Optimization and Comparison of Cylindrical Electromagnetic Vibration Energy Harvesters

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7985
Author(s):  
Tra Nguyen Phan ◽  
Jesus Javier Aranda ◽  
Bengt Oelmann ◽  
Sebastian Bader
Keyword(s):  
Power Density ◽  
Output Power ◽  
Electromagnetic Coupling ◽  
Maximum Output Power ◽  
Optimization Procedure ◽  
Vibration Energy ◽  
Maximum Output ◽  
Energy Harvesters ◽  
Electromagnetic Vibration ◽  
Halbach Array

Investigating the coil–magnet structure plays a significant role in the design process of the electromagnetic energy harvester due to the effect on the harvester’s performance. In this paper, the performance of four different electromagnetic vibration energy harvesters with cylindrical shapes constrained in the same volume were under investigation. The utilized structures are (i) two opposite polarized magnets spaced by a mild steel; (ii) a Halbach array with three magnets and one coil; (iii) a Halbach array with five magnets and one coil; and (iv) a Halbach array with five magnets and three coils. We utilized a completely automatic optimization procedure with the help of an optimization algorithm implemented in Python, supported by simulations in ANSYS Maxwell and MATLAB Simulink to obtain the maximum output power for each configuration. The simulation results show that the Halbach array with three magnets and one coil is the best for configurations with the Halbach array. Additionally, among all configurations, the harvester with two opposing magnets provides the highest output power and volume power density, while the Halbach array with three magnets and one coil provides the highest mass power density. The paper also demonstrates limitations of using the electromagnetic coupling coefficient as a metric for harvester optimization, if the ultimate goal is maximization of output power.

Sign in / Sign up

Export Citation Format

Share Document