Vibration induced refrigeration using ferroelectric materials.

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_0.2Ti_0.8)O₃-0.50(Ba_0.7Ca_0.3)TiO₃. 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 ab

SUBMITTER: Kumar A 

PROVIDER: S-EPMC6408585 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature