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- Title
Про можливість охолодження із застосуванням анізотропного діелектричного середовища.
- Authors
Ащеулов, А. А.; Дерев’янчук, М. Я.; Лавренюк, Д. О.
- Abstract
In the work presented for the first time, 2 original methods of cooling based on anisotropic dielectric materials are considered. The first method of cooling uses a unipolar anisotropic dielectric material in which the cooling process takes place with the help of electric field vortices with a laminar flow character. For such structures, in the case of the anisotropy coefficient of the plate material 0<K<1, the following are determined: the optimal orientation angle of the crystallographic axes γ=45°, the conversion factor (m), the cooling capacity (Q), the cooling depth (∆T), the efficiency factor (θ). In this case, the conversion factor is muni∈(0;1) and the efficiency factor does not exceed 1. A possible material that can be used for such a cooler is a single crystal of potassium dihydrogen phosphate (KDP). The calculated temperature difference ∆Tuni, which is achieved in this case, is in the range of 80-100 K. The second method of cooling uses a bipolar anisotropic dielectric material with the corresponding occurrence of electric field vortices in it with a turbulent flow character. The design of the cooler in this case is similar to the previous one. The use of bipolar anisotropic dielectric material causes the appearance of electric current vortices in the volume of the plate with a turbulent nature of the current, which interacts with its internal energy and significantly increases the cooling efficiency. In this case, with the anisotropy coefficient 0<K<1, a significant increase in the conversion coefficient mbi is observed in some cases of mbi≫1. In the case of using a bipolar layered artificially anisotropic material based on a classical dielectric with a positive dielectric constant and a solid-state meta-dielectric characterized by a negative value of the dielectric constant, the cooling depth ∆Tbi in such a device can reach values of 200-250 K from room temperature. The results of the conducted research show the prospects of using such devices as highly efficient refrigerating elements. These devices allow effective disposal and accumulation of cold released as specific objects, various appliances and devices, pumping it into the external environment. The conducted numerical evaluations show that the use of the proposed device will give significant environmental and economic effects.
- Subjects
DIELECTRIC materials; POTASSIUM dihydrogen phosphate; ELECTRIC currents; LAMINAR flow; TURBULENT flow
- Publication
Refrigeration Engineering & Technology, 2023, Vol 59, Issue 1, p32
- ISSN
0453-8307
- Publication type
Article
- DOI
10.15673/ret.v59i1.2608