NDLI: A Preisach-Based Nonequilibrium Methodology for Simulating Performance of Hysteretic Magnetic Refrigeration Cycles

Content Provider	Springer Nature Link
Author	Brown, Timothy D. Bruno, Nickolaus M. Chen, Jing Han Karaman, Ibrahim Ross, Joseph H. Shamberger, Patrick J.
Copyright Year	2015
Abstract	In giant magnetocaloric effect (GMCE) materials a large entropy change couples to a magnetostructural first-order phase transition, potentially providing a basis for magnetic refrigeration cycles. However, hysteresis loss greatly reduces the availability of refrigeration work in such cycles. Here, we present a methodology combining a Preisach model for rate-independent hysteresis with a thermodynamic analysis of nonequilibrium phase transformations which, for GMCE materials exhibiting hysteresis, allows an evaluation of refrigeration work and efficiency terms for an arbitrary cycle. Using simplified but physically meaningful descriptors for the magnetic and thermal properties of a Ni$_{45}$Co$_{5}$Mn$_{36.6}$In$_{13.4}$ at.% single-crystal alloy, we relate these work/efficiency terms to fundamental material properties, demonstrating the method’s use as a materials design tool. Following a simple two-parameter model for the alloy’s hysteresis properties, we compute and interpret the effect of each parameter on the cyclic refrigeration work and efficiency terms. We show that hysteresis loss is a critical concern in cycles based on GMCE systems, since the resultant lost work can reduce the refrigeration work to zero; however, we also find that the lost work may be mitigated by modifying other aspects of the transition, such as the width over which the one-way transformation occurs.
Starting Page	2123
Ending Page	2132
Page Count	10
File Format	PDF
ISSN	10474838
Journal	JOM
Volume Number	67
Issue Number	9
e-ISSN	15431851
Language	English
Publisher	Springer US
Publisher Date	2015-07-03
Publisher Institution	The Minerals, Metals & Materials Society (TMS)
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Chemistry/Food Science Physics Environment Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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