Piezoelectric polymer-based roadway energy harvesting via displacement amplification module

Title
Piezoelectric polymer-based roadway energy harvesting via displacement amplification module
Authors
강종윤김상태김정훈노명섭정인기신윤환최지영
Issue Date
2018-04
Publisher
Applied energy
Citation
VOL 216-750
Abstract
Recent research efforts show that piezoelectric polymers such as PVDF are competitive alternatives to the conventional piezoelectric ceramics. While possessing extraordinary toughness and fatigue resistance, however, piezoelectric polymers suffer from limited applications due to a large amount of deformation required for high power output. Here, we design and demonstrate a PVDF-based, high-power piezoelectric module installed on a local highway, for the first time. The module contains a bridge-type displacement amplification capability, demonstrating the 2.5 mm vertical displacement converted into 13 mm horizontal deformation, suitable for the uninterrupted driving experience. We provide the design guidelines and optimization strategies for the module, in terms of the piezoelectric power output. With 80 bimorph-shaped energy harvesters, the module achieves up to 16.5 W/m(2) energy density when the test vehicle passes by at 80 km/h. The matching impedance decreases with vehicle speed, suggesting that different matching impedance should be used for highway and local road-ways. The output power exhibits a linear relation to the vehicle speed and weight, implying the module's potential application as a self-powered speed sensor. The study demonstrates that PVDF-based energy harvesters provide a competitive power output at small vertical displacements with relevant module design, making the tough piezoelectric materials suitable for efficient and durable roadway energy harvesting.
URI
http://pubs.kist.re.kr/handle/201004/67766
ISSN
0306-2619
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE