scholarly journals Hybrid energy harvesting based on cymbal and wagon wheel inspiration

2017 ◽  
Vol 28 (19) ◽  
pp. 2872-2884
Author(s):  
Olga Ganilova ◽  
Aiman Awaludin ◽  
Riguang Dong
Keyword(s):  
Finite Element ◽  
Energy Harvesting ◽  
Shape Memory Alloy ◽  
Finite Element Model ◽  
Energy Harvester ◽  
Element Model ◽  
Hybrid Energy ◽  
Wagon Wheel ◽  
Energy Harvesting System ◽  
Hybrid Energy Harvesting

The demand for self-sufficient electronic devices is increasing as well as the overall energy use, and such demands are pushing technology forward, especially in effective energy harvesting. A novel hybrid energy harvesting system has been proposed and analysed in this article. It has been demonstrated that the energy harvesting system is capable of converting enough energy to power a typical micro-electro-mechanical system device. This has been achieved through unification of the nine–cymbal energy harvester array, as an energy harvesting core, and shape memory alloy active elements, acting as a source of force stimulated by the environmental changes. A finite element model was developed for the cymbal energy harvester, which was verified and used for the analysis of cymbal energy harvester’s response to the change of the end-cap material. This was followed by the finite element model for the energy harvesting system used for analysis of the location of shape memory alloy wires and force generated by each wire individually and then all together. As a further optimisation of the energy harvesting system, a novel wagon wheel design was explored in terms of its energy harvesting capabilities. As expected, due to the increased displacement, an increase in the power output was achieved.

Modeling and Experimental Investigation of a Periodically Excited Hybrid Energy-Harvesting Generator

2015 ◽  
Vol 0 (0) ◽  
Author(s):  
Viktor Hofmann ◽  
Gleb Kleyman ◽  
Jens Twiefel
Keyword(s):  
Experimental Investigation ◽  
Energy Harvesting ◽  
Energy Harvester ◽  
Piezoelectric Bimorph ◽  
Electric Power Output ◽  
Hybrid Energy ◽  
Energy Harvesting System ◽  
Harmonic Components ◽  
Hybrid Energy Harvesting ◽  
Harmonic System

AbstractIn this article the modeling of a broadband energy harvester utilizing piezoelectric and electromagnetic effects for rotational applications is presented. The hybrid energy harvester consists of a one-side-clamped piezoelectric bimorph with a solenoid on the free end and is excited periodically but non-harmonically by magnets that are fixed on a rotating object. To estimate and describe the performance of the energy harvester concept a linear semi-analytical model for the bimorph and the solenoid is developed and then enhanced for non-harmonic system oscillations by decomposing them into their harmonic components. A comparison between the calculated and measurement signals of a prototype device shows great conformity. According to model-based and experimental analysis, the hybrid system has good broadband behavior regarding electric power output. That aspect makes the device a perfect energy-harvesting system for application with highly fluctuating revolution speeds like miniature wind turbines.

A novel approach to determining piezoelectric properties of nanogenerators based on PVDF nanofibers using iterative finite element simulation for walking energy harvesting

2020 ◽  
pp. 152808372092649 ◽  
Author(s):  
Mohammad Kashfi ◽  
Parisa Fakhri ◽  
Babak Amini ◽  
Neda Yavari ◽  
Bahram Rashidi ◽  
...  
Keyword(s):  
Finite Element ◽  
Energy Harvesting ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Energy Harvester ◽  
Piezoelectric Properties ◽  
Element Model ◽  
Piezoelectric Response ◽  
Maximum Efficiency ◽  
Element Simulation

This study presents the experimental characterization and finite element investigation of a piezoelectric nanogenerator based on electrospun poly(vinylidene difluoride) (PVDF) nanofibers walking energy harvesting applications. The piezoelectric response of nanogenerator device was experimentally evaluated under low frequency cyclic impacts using PiezoTester. The impact test was then simulated and the obtained experimental applied force-time curve is implemented into the finite element model as the impactor external force. Based on mentioned procedure, a novel iterative finite element simulation was then introduced to determine the piezoelectric properties of PVDF nanofibers to avoid any redundant experiments. The experimental voltage-time was compared with voltage time obtained from optimized finite element model and a reasonable agreement was achieved between the numerical and experimental curves. Thereinafter, as a case study, a PVDF nanofibers nanogenerator integrated foam (PNIF) was simulated to use as an energy harvester in the shoe insole. The validated finite element model was then constructed to optimize the PNIF elasticity modulus to reach the maximum efficiency of energy harvester during human walking. The results showed that the best efficiency of the energy harvesting is achieved for 211.27 kPa PNIF modulus, which can generate 15.1 V. These results lead to the establishment of engineering design rules in the industrial scale for wearable power harvesting devices in the footwear industry.

Resource Aware Hybrid Energy Harvesting for Wireless Sensor Networks

2019 ◽  
Vol 16 (10) ◽  
pp. 4117-4124
Author(s):  
Jaspreet Kaur ◽  
Amit Kumar Bindal
Keyword(s):  
Energy Harvesting ◽  
Routing Protocol ◽  
Routing Protocols ◽  
Energy Harvester ◽  
Wireless Sensor ◽  
Coverage Area ◽  
Hybrid Energy ◽  
Simulation Based ◽  
Resource Aware ◽  
Hybrid Energy Harvesting

Sensors consume the resources to perform different operations, and energy of the nodes may be depleted due to excessive computational load; thus, may reduce the overall network lifespan as well as coverage area. Traditional energy harvesting schemes provides energy to the nodes in linear way but these schemes depend over a single source as well as these do not interact with the routing protocol. In this paper, a Hybrid Energy Harvester scheme for wireless sensor network is introduced which can utilize multiple energy sources for harvesting and also interact with the routing protocols to fulfill their energy requirements. Simulation based analysis using various protocols are performed under the QoS constraints.

An electromechanical finite element model for piezoelectric energy harvester plates

2009 ◽  
Vol 327 (1-2) ◽  
pp. 9-25 ◽  
Author(s):  
Carlos De Marqui Junior ◽  
Alper Erturk ◽  
Daniel J. Inman
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Energy Harvester ◽  
Element Model ◽  
Piezoelectric Energy

scholarly journals Power-Efficient Hybrid Energy Harvesting System for Harnessing Ambient Vibrations

2019 ◽  
Vol 66 (7) ◽  
pp. 2784-2793 ◽  
Author(s):  
Salar Chamanian ◽  
Berkay Ciftci ◽  
Hasan Ulusan ◽  
Ali Muhtaroglu ◽  
Haluk Kulah
Keyword(s):  
Energy Harvesting ◽  
Ambient Vibrations ◽  
Power Efficient ◽  
Hybrid Energy ◽  
Energy Harvesting System ◽  
Hybrid Energy Harvesting
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