Experimental Studies with an Active Magnetic Regenerating Refrigerator

Dan Eriksen, Kurt Engelbrecht, Christian Bahl, Rasmus Bjørk, Kaspar Kirstein Nielsen, Andrea Roberto Insinga, Stefano Dallolio, Nini Pryds

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Abstract

Experimental results for an active magnetic regenerator (AMR) are presented. The focus is on whether or not it pays off to partly substitute soft magnetic material with non-magnetic insulation in a flux-conducting core in the magnet system. Such a substitution reduces losses due to heat conduction and eddy currents, but also reduces the magnetic field. Two different cores were tested in the AMR system with different cooling loads and it is shown, that in the present case, replacing half of the iron with insulation lead to an average reduction in temperature span of 14%, but also a small decrease in COP, hence the substitution did not pay off. Furthermore, it is shown experimentally, that small imbalances in the heat transfer fluid flow greatly influence the system performance. A reduction of these imbalances through valve adjustments resulted in an increase in the temperature span from approximately 16 K to 27.3 K.
Original languageEnglish
Title of host publicationProceedings of the 24th IIR International Congress of Refrigeration
Number of pages8
PublisherInternational Institute of Refrigeration
Publication date2015
Publication statusPublished - 2015
Event24th IIR International Congress of Refrigeration: Improving Quality of Life, Preserving the Earth - Yokohama, Japan
Duration: 16 Aug 201522 Aug 2015
Conference number: 24

Conference

Conference24th IIR International Congress of Refrigeration
Number24
CountryJapan
CityYokohama
Period16/08/201522/08/2015

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