A modeling study on the geometry of active magnetic regenerator

Jing Li, T. Numazawa, K. Matsumoto, Y. Yanagisawa, H. Nakagome

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

Magnetic refrigeration technology needs further development not just by the improvement of magnetocaloric properties but also the optimization of the cooling system design. One of the important problems in the cooling system design is the geometry of regenerator for the efficient heat transfer between magnetic material and fluid which is the major loss mechanism in cooling system. Two kinds of regenerators are widely used. One is flat plate regenerator which can offer the best heat transfer to pressure drop ratio [2] for common regenerator design; another is porous media regenerator which can obtain a large temperature span for the good heat transfer surface. But until now, only a few research papers actually study the regenerator geometry. This paper focuses on the influence of regenerator geometry to the performance of AMR system. The 1 dimension flat plat model and porous media model have been constructed and compared with entropy generation, cooling capacity, coefficient of performance by changing plate thickness and sphere size at frequency 0.25Hz, 0.5Hz, 1, aspect ratio 2, 7, 14. The result shows that the optimized sphere size will be around 0.2mm to 0.3mm. On the other hand, 0.1mm to 0.2mm thickness plate will be more efficient. Compared the 2 models, flat plate model can get a smaller entropy generation and achieve a higher cooling capacity.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference-CEC
Pages327-334
Number of pages8
Edition57
DOIs
Publication statusPublished - 2012 Aug 8
Externally publishedYes
Event2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences - Spokane, WA, United States
Duration: 2011 Jun 132011 Jun 17

Publication series

NameAIP Conference Proceedings
Number57
Volume1434
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences
CountryUnited States
CitySpokane, WA
Period11/6/1311/6/17

Keywords

  • AMR
  • Entropy generation minimization
  • Flat plate regenerator
  • Magnetic refrigeration
  • Modeling
  • Porous media regenerator
  • Regenerator geometry

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'A modeling study on the geometry of active magnetic regenerator'. Together they form a unique fingerprint.

  • Cite this

    Li, J., Numazawa, T., Matsumoto, K., Yanagisawa, Y., & Nakagome, H. (2012). A modeling study on the geometry of active magnetic regenerator. In Advances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference-CEC (57 ed., pp. 327-334). (AIP Conference Proceedings; Vol. 1434, No. 57). https://doi.org/10.1063/1.4706936