Influence of Ultrasonic Field on Kinetic Coefficients in the Process of Extraction

Kosheleva, M. K.; Rudobashta, S. P.

doi:10.1007/s10891-019-02052-z

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…4 illustrates a decrease in the mass conductivity coefficient with a decrease in the moisture content of the fabric, which is most significantly manifested at higher temperatures of the drying agent. The presence of the concentration dependence of the coefficient of mass permeability at different temperatures of the drying agent allows in many cases to carry out kinetic calculation and numerical modeling of the drying process based on mathematical models [7][8][9][10][11][12]. The obtained results can be used to analyze and calculate the kinetics of convective drying of fabrics, taking into account the experimentally justified dependence of the mass conductivity coefficients on the moisture content of the material and the temperature of the drying agent, to predict the kinetics of convective drying of dense woolen fabrics.…”

Section: Resultsmentioning

confidence: 99%

Mass Conductivity of Flat Fibrous Materials During Their Convective Drying

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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The kinetics of drying dense woolen fabric under various temperature conditions was experimentally investigated. The mass-conducting properties of the fabric were determined depending on its moisture content and the temperature of the drying agent. Data on the thermophysical characteristics of drying objects, including mass conductivity coefficients, are necessary for calculating the kinetics of the drying process. Information on mass conductivity coefficients is not available for many materials, including fabrics, since their experimental determination is difficult. Experimental studies of the kinetics of convective drying of dense woolen fabric were carried out on a specially created installation under conditions excluding external diffusion resistance. To calculate the mass conductivity coefficients, a zonal method was used to determine the concentration dependence of the mass conductivity coefficient from the drying kinetics curves obtained at different temperatures. The nonlinear nature of the dependence of the mass conductivity coefficient on the moisture content of the material and the temperature of the drying agent is established. For the convenience of engineering calculations, the obtained data on the mass conductivity coefficients are approximated by formulas expressing their dependence on the moisture content of the material and temperature. The coefficients of mass conductivity calculated by the zonal method using experimental curves of drying kinetics are compared with the coefficients of mass conductivity calculated using the obtained dependence of the coefficients on the moisture content of the material and the temperature of the drying agent. The good quality of the approximation of the experimental curves obtained for the mass conductivity coefficient in this study and the applicability of the latter for calculations are shown. The obtained data on the kinetic coefficients of mass conductivity can be used to calculate the kinetics of the drying process of various dense woolen fabrics.

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Section: Resultsmentioning

confidence: 99%

Mass Conductivity of Flat Fibrous Materials During Their Convective Drying

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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“…Intensification by a reasonably chosen method and calculation of the drying process of fibrous materials is one of the urgent tasks in the chemical technology of finishing production of textile enterprises [1][2][3]. It is known that physical fields, including an ultrasonic field, are widely used to intensify the drying process of various materials [4][5][6][7][8]. The analysis of domestic and foreign literature sources shows that there have been practically no studies of the process of continuous drying of flat textile materials, including dense woolen fabrics with ultrasonic exposure to intensify the process.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of contact ultrasonic drying of thick woolen fabric

Kosheleva¹,

Shalunov

Dornyak

et al. 2023

E3S Web of Conf.

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The article is devoted to an experimental research of the effectiveness of continuous contact ultrasonic drying of dense woolen fabrics. For drying, an experimental stand was created in the form of a small-sized continuous-action drying machine. In the process, the dried fabric is rewound from reel to reel, through the zone of ultrasonic (150 W) and thermal (at temperatures of 50 °C and 80 °C) exposure. It has been established that ultrasonic action (together with thermal) provides a reduction in drying time from 18% to 28%. Moreover, at a lower temperature, the contribution of ultrasonic vibrations to the reduction of drying time is higher. The drying schedules were approximated by a formula expressing the dependence of the moisture content of the material on temperature and the presence of ultrasonic exposure. The resulting approximation formula can be used to analyze the curves of convective drying of dense woolen fabrics, taking into account the temperature of the drying agent and the presence of ultrasonic exposure, including predicting the duration of such types of drying.

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