Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 101, Issue -, Pages 98-105Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2019.02.029
Keywords
Solid state refrigeration; Ferroic refrigeration; Magnetocaloric effect; Magnetic field
Categories
Funding
- Bosch Termotecnologia S. A. [POCI-01-0247-FEDER-007678]
- University of Aveiro [POCI-01-0247-FEDER-007678]
- Portugal 2020 under the Competitiveness and Internationalization Operational Program
- European Regional Development Fund
- FCT/MEC [POCI-01-0145-FEDER-007679, UID/CT/5001/2013]
- FEDER under the PT2020 Partnership Agreement
- FCT [IF/01089/2015]
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So far, all ferroic-based refrigerator prototypes have relied either in fluids or thermally switchable components as main heat exchangers, which brings some issues in terms of their applicability, such as the use of pumps for moving the fluid and the availability of thermally switchable components. We show that such heat exchangers are not necessary if field dynamics are explored. By using the example of magnetocaloric refrigeration, we show numerically that the operation of a simple apparatus constituted only by a magnetocaloric material and a magnet sweeping at a given frequency results in refrigeration. With the optimization of the type of motion, resting times after the complete application and removal of the magnetic field and frequency, a temperature span of 0.87 K is reached, which represents similar to 20% of the maximum adiabatic temperature span of the material used in modeling, gadolinium. (C) 2019 Elsevier Ltd and IIR. All rights reserved.
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