| Issue |
MATEC Web Conf.
Volume 148, 2018
International Conference on Engineering Vibration (ICoEV 2017)
|
|
|---|---|---|
| Article Number | 12002 | |
| Number of page(s) | 6 | |
| Section | Nonlinear Effects in Broadband Energy Harvesting from Mechanical Vibrations | |
| DOI | https://doi.org/10.1051/matecconf/201814812002 | |
| Published online | 02 February 2018 | |
Modelling and Investigation of a Hybrid Thermal Energy Harvester
1
Technical University - Sofia, Faculty of Industrial Technology, Department of Theory of Mechanisms and Machines, 1797, Sofia, Bulgaria
2
Technical University - Sofia, Faculty of Industrial Technology, Dept. of Technology of Machine Tools and Manufacturing, 1797, Sofia, Bulgaria
* Corresponding author: tst@tu-sofia.bg
The presented paper deals with dynamical and experimental investigations of a hybrid energy harvester containing shape memory alloy (SMA) wire and elastic cantilever with piezoelectric layer. The SMA wire periodically changes its temperature under the influence of a heated plate that approaches and moves away from the SMA wire. The change of SMA wire length causes rotation of the hot plate. The plate is heated by a heater with constant temperature. The repeated SMA wire extensions and contractions bend the piezoelectric cantilever which generates electric charges. The shape memory effect is presented as a temperature approximation of the Young’s modulus. A dynamical model of the energy harvester is created and some analytical investigations are presented. With the help of an experimental setup the acceleration, the force, the temperature, and the output voltage have been measured. The theoretical results are validated experimentally. Some conclusions are made about the best performance of the energy harvester.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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