Development and Experimental Results from a 1 kW Prototype AMR

Christian Bahl, Kurt Engelbrecht, Dan Eriksen, Jaime Lozano, Rasmus Bjørk, Jørgen Geyti, Kaspar Kirstein Nielsen, Anders Smith, Nini Pryds

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Abstract

A novel rotary magnetic refrigeration device has been designed and constructed following the concepts recently outlined in Bahl et al. (2011). The magnet and flow system design allow for almost continuous usage of both the magnetic field and the magnetocaloric material in 24 cassettes, each containing an active magnetic regenerator (AMR) bed. As outlined in Pryds et al. (2009) a small scale AMR test device has been used for materials choice and optimising operation, with each component being thoroughly characterised and tested before implementation. The prototype design facilitates easy exchange of the 24 cassettes, allowing the testing of different material amounts and compositions. Operating with 2.8 kg of commercial grade Gd spheres a maximum no-span cooling power of 1010 W and a maximum zero load temperature span of 25.4 K have been achieved. For the purpose of actual operation, simultaneous high span and high performance is required. At a heat load of 200 W a high temperature span of 18.9 K has been obtained, dropping to a span of 13.8 K at the higher heat load value of 400 W.
Original languageEnglish
Title of host publicationProceedings of the fifth IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature : Thermag V
Number of pages9
Publication date2012
Publication statusPublished - 2012
Event5th IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature - Grenoble, France
Duration: 17 Sep 201220 Sep 2012
Conference number: 5
http://thermagv.grenoble.cnrs.fr/

Conference

Conference5th IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature
Number5
CountryFrance
CityGrenoble
Period17/09/201220/09/2012
Internet address

Keywords

  • active magnetic regenerators

Cite this

Bahl, C., Engelbrecht, K., Eriksen, D., Lozano, J., Bjørk, R., Geyti, J., ... Pryds, N. (2012). Development and Experimental Results from a 1 kW Prototype AMR. In Proceedings of the fifth IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature: Thermag V