Abstract
This article aims to propose a cantilever based cooling device employing non-axis symmetric placement of bulk ferroelectric patches. Ambient mechanical vibrations produce large stresses in cantilevers resulting in elastocaloric effect associated with ferroelectrics. Further, design allows cascading of several cantilevers to achieve large cooling response. A finite element analysis of the system was performed using material properties of bulk 0.50Ba(Zr 0.2 Ti 0.8 )O 3 −0.50(Ba 0.7 Ca 0.3 )TiO 3 . An individual element could produce a peak elastocaloric effect of 0.02 K (324 K); whereas the proposed system could achieve a temperature drop of 0.2 K within 50 seconds (10 elements, 1.5 Hz). Furthermore, net cooling can be further improved about ~2 K (using 10 cantilevers) for a starting temperature of 358 K. This study shows that elastocaloric effect in ferroelectric materials is capable of converting waste mechanical vibration into refrigeration effect which is not reported so far.
| Original language | English |
|---|---|
| Article number | 3922 |
| Journal | Scientific Reports |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Dec 2019 |
| Externally published | Yes |
Bibliographical note
Funding Information:One of the authors Rahul Vaish acknowledges support from the Indian National Science Academy (INSA), Delhi, India, through a grant by the Department of Science and Technology (DST), Delhi, under INSPIRE faculty award-2011 (ENG-01) and INSA Young Scientists Medal-2013. Aditya Chauhan acknowledges the support of SERB, India in the form of Cambridge India Ramanujan fellowship. Satyanarayan Patel would like to acknowledge sponsorship provided by the Alexander-von-Humboldt Foundation.
Publisher Copyright:
© 2019, The Author(s).