Determining the minimum mass and cost of a magnetic refrigerator

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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An expression is determined for the mass of the magnet and magnetocaloric material needed for a magnetic refrigerator and these are determined using numerical modeling for both parallel plate and packed sphere bed regenerators as function of temperature span and cooling power. As magnetocaloric material Gd or a model material with a constant adiabatic temperature change, representing an infinitely linearly graded refrigeration device, is used. For the magnet a maximum figure of merit magnet or a Halbach cylinder is used. For a cost of $40 and $20 per kg for the magnet and magnetocaloric material, respectively, the cheapest 100 W parallel plate refrigerator with a temperature span of 20 K using Gd and a Halbach magnet has 0.8 kg of magnet, 0.3 kg of Gd and a cost of $35. Using the constant material reduces this cost to $25. A packed sphere bed refrigerator with the constant material costs $7. It is also shown that increasing the operation frequency reduces the cost. Finally, the lowest cost is also found as a function of the cost of the magnet and magnetocaloric material.
Original languageEnglish
JournalInternational Journal of Refrigeration
Publication date2011
Volume34
Issue8
Pages1805-1816
ISSN0140-7007
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 5

Keywords

  • Magnetic refrigeration
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