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Steady-state optimization of a rotary Steyert-like magnetic refrigerator.

Author(s) : SCARPA F., TAGLIAFICO G., TAGLIAFICO L. A.

Summary

A thermodynamic steady-state model is employed to investigate the behavior of a rotary Steyert like magnetic refrigerator device, operating near room temperature. This configuration performs an active magnetic regenerative (AMR) process, to attain high values of temperature difference between the hot and the cold sources (temperature span). In this way, the magneto caloric effect (MCE, adiabatic temperature change delta-T(ad)(B,T)) showed by the magneto caloric material (MCM) can be amplified by several times. The present investigation focuses on the influence that some of the design parameters have on the global performance of the device. In particular, the influence of the thermal capacity rate ratio (TCR) and of the porosity of the magneto caloric bed (void fraction) on the refrigeration capacity, and on the coefficient of performance (COP) are investigated. Optimal values of the TCR in the range 1-1.1, and an optimal bed porosity around 0.3 were found.

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Pages: 2007-1

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Details

  • Original title: Steady-state optimization of a rotary Steyert-like magnetic refrigerator.
  • Record ID : 2007-1563
  • Languages: English
  • Source: 2nd International Conference on Magnetic Refrigeration at Room Temperature
  • Publication date: 2007/04/11

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