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Experimental study of a single sandwich unit and a multi-unit system using Peltier thermal switch in magnetic refrigeration.

Author(s) : HUANG H., SHEN J., LI Z., LI K., HAI P., ZHENG W., DAI W.

Type of article: IJR article

Summary

To increasing the operating frequency of conventional magnetic refrigerators, some researchers have proposed a hybrid approach using Peltier thermal switches in magnetic refrigeration. In this hybrid approach, the magnetic material is sandwiched between Peltier elements which are used as the thermal switches to transport the heat to and from the material undergoing the magnetic refrigeration cycle. While some simulation studies have shown promising results, practical experimental verification is still lacking. To verify the practical feasibility of this hybrid method, an experimental test platform was developed, integrating electric field, magnetic field, and flow field coupling, which is a novel approach. Single sandwich unit experiments demonstrated a 0.26 K temperature reduction in hybrid mode versus pure Peltier operation, validating the effectiveness of using Peltier thermal switches in magnetic refrigeration. Multi-unit system consisting of seven sandwich units achieved a 12.1 K temperature span under specific parameters (2 mm MCM, 1.2 A, 0.125 Hz, 30 ml/min). To improve the performance of the hybrid mode, accurate control is needed to achieve unidirectional heat transfer and increase the proportion of magnetic refrigeration.

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Details

  • Original title: Experimental study of a single sandwich unit and a multi-unit system using Peltier thermal switch in magnetic refrigeration.
  • Record ID : 30034355
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 179
  • Publication date: 2025/11
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2025.08.026

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