Publication Date
6-2020
Department
Ames Laboratory; Materials Science and Engineering
Campus Units
Ames Laboratory, Materials Science and Engineering
OSTI ID+
1596771
Report Number
IS-J 10137
DOI
10.1016/j.apmt.2020.100557
Journal Title
Applied Materials Today
Volume Number
19
First Page
100557
Abstract
The elastocaloric effect underpins a promising solid-state heat pumping technology that, when adopted for commercial and residential applications, can revolutionize the cooling and heating industry due to low environmental impact and substantial energy savings. Known operational demonstration devices based on the elastocaloric effect suffer from low endurance of materials and, in most experimental systems, from large footprints due to bulky actuators required to provide sufficient forces and displacements. We demonstrate a new approach which has the potential to enable a more effective exploitation of the elastocaloric effect by reducing the forces required for actuation. Thin strips of NiTi were incorporated into composite structures with base polymer, such that bending the structures results in either exclusively compression or exclusively tension applied to the elastocaloric strips. The structures allow compression of thin elastocaloric strips without buckling, realize more than 50 % reduction in required forces for a given strain compared with axial loading, and open up a wide range of possibilities for compact, efficient elastocaloric devices.
DOE Contract Number(s)
AC02-07CH11358
Language
en
Department of Energy Subject Categories
42 ENGINEERING
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Supplementary Information
