Methods of calculating the kinetics of drying of natural leather
https://doi.org/10.29235/1561-8358-2022-67-4-393-401
Abstract
A method for calculating drying kinetics based on A. V. Lyikov’s kinetics equation and drying rate curves for the drying process of natural leather is presented. Methods of approximating velocity curves to determine the drying time are considered. An equation for calculating the drying time of natural leather with a variable drying factor is presented. Based on the processing of experimental data on drying of natural leathers, equations for calculating heat flux densities, intensity of moisture evaporation and material temperature in the period of falling drying rate are presented. Based on the approximation of drying speed curves for natural leathers, the equations for calculating the drying time by the methods of A. V. Lyikov, V. V. Krasnikov, and N. S. Mikheeva are considered. The dependence of the relative drying rate on the dimensionless moisture content is presented. The reliability of the experimental equations was checked and the calculated values of the drying time and material temperature were compared with the experiment. The proposed approximate methods of calculating the skin drying speed curve make it possible to evaluate the nature of the drying process of a particular material by individual zones of the second period and when changing the drying mode. They also make possible determination of the most important parameters of drying kinetics and reduction of the number of experiments.
About the Authors
A. I. Ol’shanskii
Vitebsk State Technological University
Belarus
Belarus
Anatolii I. Ol’shanskii – Ph. D. (Engineering), Associate Professor, Associate Professor at the Department of Heat Power Engineering
72, Moskovsky Ave., 210035, Vitebsk
A. A. Kotow
Vitebsk State Technological University
Belarus
Belarus
Alexej A. Kotow – Assistant at the Department of Heat Power Engineering
72, Moskovsky Ave., 210035, Vitebsk
S. M. Kuzmenkov
Vitebsk State Technological University
Belarus
Belarus
Sergey M. Kuzmenkov – Assistant at the Department of Mechanical Engineering
72, Moskovsky Ave., 210035, Vitebsk
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