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. 
@article{CHFMJ_2021_6_1_a9,
     author = {K. A. Kolesov and A. V. Mashirov and V. V. Koledov and O. V. Belova and D. A. Kalinkin and S. V. Gorjunov and A. P. Kamantsev and A. O. Petrov and V. G. Shavrov},
     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},
     pages = {111--118},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_1_a9/}
}
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%A S. V. Gorjunov
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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/