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)

IS-J 10137 SI.pdf (657 kB)
Supplementary Information

Available for download on Thursday, January 14, 2021

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