Cooling by sweeping: A new operation method to achieve ferroic refrigeration without fluids or thermally switchable components
authors Silva, DJ; Amaral, JS; Amaral, VS
nationality International
journal INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
author keywords Solid state refrigeration; Ferroic refrigeration; Magnetocaloric effect; Magnetic field
keywords CALORIC MATERIALS; DEVICE
abstract 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.
publisher ELSEVIER SCI LTD
issn 0140-7007
year published 2019
volume 101
beginning page 98
ending page 105
digital object identifier (doi) 10.1016/j.ijrefrig.2019.02.029
web of science category Thermodynamics; Engineering, Mechanical
subject category Thermodynamics; Engineering
unique article identifier WOS:000470966500011
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journal analysis (jcr 2017):
journal impact factor 3.233
5 year journal impact factor 3.328
category normalized journal impact factor percentile 85.504
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