Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 37, Issue -, Pages 51-62Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2013.08.007
Keywords
AMR cycle; Thermodynamics; Magnetocaloric effect; Magnetic refrigeration
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
- H2Can Strategic Network
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A system modeling approach for predicting the performance of active magnetic regenerators using a one-phase approximation is presented. The approach is described for an arbitrary AMR device independent of the magnetic refrigerant, thermal losses or magnetic waveform. A general expression for magnetic work is derived which can be used for cycles where the low-field intensity is not zero. Additionally, a means of treating the varying magnetic field waveform as a single high and low field is described. The model is applied to a permanent magnet magnetic refrigerator using water glycol as the heat transfer fluid. Simulated results are compared to experimental data which vary by heat load, frequency and utilization. A sensitivity analysis is performed using utilization, adiabatic temperature change, effective conductivity and particle size as independent variables. Comparisons to experimental data show that reducing the calculated magnetocaloric effect by 25% provides good agreement between simulations and experimental results. (C) 2013 Elsevier Ltd and IIR. All rights reserved.
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