Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 35, Issue 2, Pages 459-467Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2011.11.001
Keywords
Magnetic refrigerator; Modelling; Thermodynamic cycle; Exergy; Gadolinium
Categories
Funding
- European Commission under European Community [265434]
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The simulation of magnetocaloric refrigerator behaviour needs a good description of the material properties. Magnetocaloric material data are often given as a function of few values of the external magnetic field applied on a sample, but active material reacts to its internal field. The simulating of the magnetocaloric effect using experimental data can then create some artefacts. In this paper we present an alternative way to obtain material data expressed as a function of the internal magnetic field. This characterization is built on the knowledge of the zero magnetic field heat capacity of second-order phase transition materials such as gadolinium, as well as on the direct measurements of magnetocaloric data. An inverse approach is performed to calculate the data as a function of the internal magnetic field with an improved level of detail. The obtained data allow a better modelling of the magnetocaloric effect in an active magnetic regenerator. (C) 2011 Elsevier Ltd and IIR. All rights reserved.
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