Geodesic
Determination of heat transfer parameters in the mechanical heat switch for a refrigerating machine with magnetocaloric effect
Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 1, pp. 111-118.

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The process of heat transfer in a mechanical thermal switch, which is an integral part of a solid-state magnetic refrigerator with a working body made of an alloy with a magnetocaloric effect (MCE), for example, DyNi$_2$, is investigated theoretically. In the working cycle of the refrigerator, the alloy can be a source of heat or a heat sink, respectively, during adiabatic magnetization or demagnetization. In the thermal key, the DyNi$_2$ alloy disk and the annealed copper disk are being in contact. These discs are fixed with a textolite holder along the periphery. With the help of an actuator, a working body in the form of a DyNi$_2$ alloy disk is adiabatically introduced and removed into the magnetic field of a superconducting magnet with an induction of up to 10 T. A numerical experiment was used to assess the degree of adiabaticity when fastened with a textolite holder. Also, by means of a numerical experiment, the amount of heat transferred from the working body DyNi$_2$ to the copper disks of the thermal switch is investigated. As a result of the calculation, the value of the time is required to transfer the heat as a result of the MCE from the DyNi$_2$ alloy to the copper disk was obtained, which was about 0.065 sec.
Keywords: heat transfer, magnetocaloric effect, heat switch, heat exchangers. 
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     title = {Determination of heat transfer parameters in the mechanical heat switch for a refrigerating machine with magnetocaloric effect},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
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     publisher = {mathdoc},
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     number = {1},
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K. A. Kolesov; A. V. Mashirov; V. V. Koledov; O. V. Belova; D. A. Kalinkin; S. V. Gorjunov; A. P. Kamantsev; A. O. Petrov; V. G. Shavrov. Determination of heat transfer parameters in the mechanical heat switch for a refrigerating machine with magnetocaloric effect. Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 1, pp. 111-118. http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_1_a9/

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