Authors

Dissipative characteristics of refrigerating machines

DOI: 10.17586/1606-4313-2024-23-4-72-78
UDC 534.282

Dissipative characteristics of refrigerating machines

Rykov S.A., Rykov S.V. , Kudryavtseva I.V.

For citation: Rykov S.A., Rykov S.V., Kudryavtseva I.V. Dissipative characteristics of refrigerating machines. Journal of International Academy of Refrigeration. 2024. No 4. p. 72-78. DOI: 10.17586/1606-4313-2024-23-4-72-78

Abstract
The research of vibroacoustic characteristics for refrigerating machines is carried out, in particular, the aspects concerning the process of vibration energy dissipation in refrigerating machines are considered. It is shown that one of the main parameters influencing the value of the acoustic and vibration field created by the refrigeration machine during its operation is the value of the loss coefficient in the machine elements. The study of the dissipation nature in a structure is carried out using a mathematical model. The reasons leading to a jump-like change of the loss coefficient values at its experimental determination, which are connected with the change of the contribution of separate elements in the refrigeration machine at the transition from one resonance frequency to another, are analyzed. The theoretical expressions allowing to make quantitative and qualitative predictive estimation of the loss factor in the refrigeration machine at low and high frequencies are obtained.

Keywords: refrigerating machine, structural losses, absorption coefficient, loss coefficient, frequency, regression curve.

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