2-dimensional numerical modeling of active magnetic regeneration

Kaspar Kirstein Nielsen, Nini Pryds, Anders Smith, Christian Robert Haffenden Bahl, Jesper Henri Hattel

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Abstract

Various aspects of numerical modeling of Active Magnetic Regeneration (AMR) are presented. Using a 2-dimensional numerical model for solving the unsteady heat transfer equations for the AMR system, a range of physical effects on both idealized and non-idealized AMR are investigated. The modeled system represents a linear, parallel-plate based AMR. The idealized version of the model is able to predict the theoretical performance of AMR in terms of cooling power and temperature span. This is useful to a certain extent, but a model reproducing experiments to a higher degree is desirable. Therefore physical effects such as thermal parasitic losses have been included. Furthermore, experimentally found magnetocaloric properties are used when available, since the commonly used mean field model can be too idealized and is not always able to determine the magnetocaloric effect accurately. In the present paper preliminary conclusions on which non-ideal physical effects are thought to be dominating considering the performance of experimental AMR are given. The modeling results are compared to experimental results from the AMR test device situated at Risø DTU, Technical University of Denmark. The experimental validation shows that using the measured magnetocaloric properties significantly improves the modeling results compared to using the mean field model.
Original languageEnglish
Title of host publication3rd International Conference on Magnetic Refrigeration at Room Temperature
Number of pages508
Volume1
PublisherInternational Institute of Refrigeration
Publication date2009
Edition1
Pages251-258
ISBN (Print)978-2-913149-67-0
Publication statusPublished - 2009
Event3rd International Conference of the IIR on Magnetic Refrigeration at Room Temperature - Des Moines, Iowa, United States
Duration: 11 May 200915 May 2009
Conference number: 3

Conference

Conference3rd International Conference of the IIR on Magnetic Refrigeration at Room Temperature
Number3
CountryUnited States
CityDes Moines, Iowa
Period11/05/200915/05/2009

Keywords

  • Magnetic refrigeration
  • Fuel Cells and hydrogen
  • modeling
  • magnetocaloric effect

Cite this

Nielsen, K. K., Pryds, N., Smith, A., Bahl, C. R. H., & Hattel, J. H. (2009). 2-dimensional numerical modeling of active magnetic regeneration. In 3rd International Conference on Magnetic Refrigeration at Room Temperature (1 ed., Vol. 1, pp. 251-258). International Institute of Refrigeration.