Quantification of the effect of hysteresis on the adiabatic temperature change in magnetocaloric materials

Lars von Moos, Christian R.H. Bahl, Kaspar Kirstein Nielsen, Kurt Engelbrecht

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Abstract

We quantify the effect of hysteresis on the performance of the magnetocaloric first order material Gd5Si2Ge2 undergoing an ideal active magnetic regenerator (AMR) cycle. The material is carefully characterized through magnetometry (VSM) and calorimetry (DSC) in order to enable an accurate model description of the phase transition at varying magnetic fields and temperatures. Using detailed experimental property data, a Preisach type model is used to describe the thermal hysteresis effects and simulate the material under realistic working conditions. We find that the adiabatic temperature change is limited by a significant fraction of the thermal hysteresis.
Original languageEnglish
Title of host publicationProceedings of the 6th IIF-IIR international Conference on Magnetic Refrigeration
Number of pages2
PublisherInternational Institute of Refrigeration
Publication date2014
Publication statusPublished - 2014
Event6th IIR/IIF International Conference on Magnetic Refrigeration - Fairmont Empress Conference Center, Victoria, Canada
Duration: 7 Sep 201410 Sep 2014
http://www.iesvic.uvic.ca/events/ThermagVI/

Conference

Conference6th IIR/IIF International Conference on Magnetic Refrigeration
LocationFairmont Empress Conference Center
CountryCanada
CityVictoria
Period07/09/201410/09/2014
Internet address

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