Improved modelling of a parallel plate active magnetic regenerator

Kurt Engelbrecht, J. Tušek, Kaspar Kirstein Nielsen, A Kitanovski, Christian R.H. Bahl, A Poredoš

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Much of the active magnetic regenerator (AMR) modelling presented in the literature considers only the solid and fluid domains of the regenerator and ignores other physical effects that have been shown to be important, such as demagnetizing fields in the regenerator, parasitic heat losses and fluid flow maldistribution in the regenerator. This paper studies the effects of these loss mechanisms and compares theoretical results with experimental results obtained on an experimental AMR device. Three parallel plate regenerators were tested, each having different demagnetizing field characteristics and fluid flow maldistributions. It was shown that when these loss mechanisms are ignored, the model significantly over predicts experimental results. Including the loss mechanisms can significantly change the model predictions, depending on the operating conditions and construction of the regenerator. The model is compared with experimental results for a range of fluid flow rates and cooling loads.
Original languageEnglish
JournalJournal of Physics D: Applied Physics
Volume46
Issue number25
Pages (from-to)255002
Number of pages11
ISSN0022-3727
DOIs
Publication statusPublished - 2013

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