Wyniki wyszukiwania - BazTech

1

Minimization of Energy Consumption of Vortex Devices for Granulation of Materials

Pavlenko Anatoliy, Cheilytko Andrii, Ilin Sergii, Karpenko Hanna

Rocznik Ochrona Środowiska

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2023

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Tom 25

198--207

EN

The article considers the possibility of efficient energy and environmental use of vortex devices for the granulation of solids. The factors influencing the energy consumption for generating a vortex flow with dispersed solid inclusions are analysed. A mathematical model for calculating the aerodynamic drag of a vortex apparatus in a clean gas flow, which was used in computer modelling, is presented. The main dependencies for determining the influence of the geometric dimensions of the vortex on its aerodynamic drag are also given. An analytical solution to the problem of minimising the aerodynamic drag of a vortex apparatus during the movement of a dispersed medium is considered. The forces acting on the particles in the cyclone chamber during interaction with the gas are analysed. In this paper, a general method for calculating the parameters of cyclone-vortex devices for dispersed media using the basic equations of hydrodynamics and gas dynamics is developed. The solution approach used in this paper can be extended to other vortex devices not considered in this work.

2

Research of the question of increase of efficiency of cooling of the power equipment of hydroelectric power plants

Cheilytko Andrii, Ilin Sergii

Journal of New Technologies in Environmental Science

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2020

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Vol. 4, nr 1

22--29

EN

Improving the cooling efficiency of power transformer windings with a cross-sectional width of the radial channel less than 3 mm, by improving the geometric parameters of the cooling system while reducing the material consumption of the electric machine is an important area of research. Excess oil pressure in the winding channels increases with increasing serial number of the coil. It was found that with increasing oil velocity at the inlet to the horizontal channel, the values of excess pressure in it increase in quadratic degree. It is established that a lifting force occurs in the oil of the horizontal channel, as evidenced by the increase in excess pressure near the upper boundary of the channel. For the first time, an analytical dependence of the excess oil pressure in the radial channel of the disk winding of the power transformer on the oil flow rate at the inlet to this channel was obtained. The dependences of the excess pressure in horizontal channels with a cross-sectional width of 1 mm on the velocity of oil at the inlet to this channel were obtained, which allows to calculate the speed by which it is possible to organize through circulation of oil in the channel provided that excessive pressure in the channel is prevented. situations. A new mathematical model of interconnected heat exchange and hydrodynamic processes in the disk windings of a power transformer is proposed, which, unlike the existing ones, takes into account the width of the horizontal channel less than 3 mm, which allows to predict the heat distribution in the winding and determine possible locations overheating of coils and premature destruction of insulating materials.

3

Research of environmental and technological problems of cavitation

Cheilytko Andrii, Osaul Alexandr, Ilin Sergii, Volkov Timofii

Journal of New Technologies in Environmental Science

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2020

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Vol. 4, nr 1

36--48

EN

The comparative analysis of systems of conversion of electric energy into mechanical and mechanical into thermal with realization of effect of cavitation in a stream of the liquid transported in a closed circuit is carried out. The optimal dimensions and relief of working surfaces of swirlers in tubular and rotary cavitators are determined. The regularities of the change of the coolant temperature depending on its nature, the intensity of cavitation, which is determined by the rotational-translational and rotational motion in cavitators of two types - tubular and rotary.

4

Research of cyclone characteristics for dry cleaning of gases from dust

Cheilytko Andrii, Ilin Sergii

Journal of New Technologies in Environmental Science

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2020

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Vol. 4, nr 3

134--142

EN

The development and application of new, more efficient dust collection units that will help reduce emissions and conserve some very valuable resources for production is an important area of research. With the growth of innovation in technological enterprises, the number of harmful emissions into the atmosphere is growing. Thus, the ecological condition of the environment deteriorates. The basic analytical dependences which are necessary for construction of a technique of carrying out experiments and calculations of dust catching for concrete working conditions are developed. Methods of calculating cyclones as vortex devices and research of cyclone operation for air purification from dust were investigated. On the basis of the used basic theoretical positions of heat and mass transfer and thermodynamics at carrying out analytical researches the mathematical model was offered. Calculations of new designs of modern cyclones to obtain their geometric dimensions, resistance and dust capture efficiency were presented. Modern cyclones are designed to more effectively remove dust from the air during various types of work.

5

Thermal conductivity calculation method: porous structures

Pavlenko Anatoliy, Cheilytko Andrii O., Ilin Sergii, Belokon Yevgen

Journal of New Technologies in Environmental Science

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2019

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Vol. 3, nr 4

194--205

EN

The article describes the transfer of thermal energy through porous bodies with closed and open porosity. The semi-empirical equation for finding the effective coefficient of thermal conductivity of bodies with a porous structure is derived. The equation of finding the thermal permeability of the porous material and the geometric characteristics of the porous structure are presented.