Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 68, Issue -, Pages 94-106Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2016.04.013
Keywords
Magnetic refrigeration; Microchannel regenerator; Numerical modelling; Magnetocaloric material; Multi-material/Layered regenerator
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Funding
- University of Engineering and Technology Lahore, Pakistan
- EU research grant [FP7-2010-IRSES-269205]
- National Natural Science Foundation of China [51176050]
- Engineering and Physical Sciences Research Council [EP/L001233/1] Funding Source: researchfish
- EPSRC [EP/L001233/1] Funding Source: UKRI
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A hybrid numerical model of the magnetic refrigerator with multi-material microchannel regenerator has been developed. The magnetocaloric effect was implemented using instantaneous temperature rise/drop (discrete method). Two pipe-in-pipe heat exchangers at two ends of the regenerator were treated using e-NTU method. The commercially available compounds of LaFe13-x-yCoxSiy as well as hypothetical compounds of Gadolinium were considered as the magnetocaloric materials (MCMs) with different Curie temperatures. The predicted results of the present work for parallel-plate regenerators employing different compounds of LaFe13-x-yCoxSiy were broadly in good agreement with the available experimental data. The cooling capacity increases as the number of MCMs increase. However, for a given length of regenerator, an optimum number of MCMs was seen yielding the maximum performance of the refrigerator. For a given number of MCMs, a smaller Curie temperature difference Delta T-Cu between the MCMs was found to give higher performance. (C) 2016 Elsevier Ltd and IIR. All rights reserved.
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