Technical Transactions iss. 3. Mechanics iss. 2-M

Technical Transactions iss. 3. Mechanics iss. 2-M

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Release date

Collection items (25)


Environmental interaction assessment of VOC’s emission from printing plant hot rotary heat-set

Krawczyk, Janusz, Heryan, Andrzej, Wawszczak, Łukasz
Article
2016
The paper presents an analysis of gaseous emissions arising from the operations of printing using a printing process hot offset rotary. The first part presents the general characteristics of the process and the paint used. The following part shows the results of modelling the emission of pollutants according to the efficiency of the cleaning system, as well as depending on other parameters influencing the dispersion process impurities.


Performance of a cyclone with an aslant shaped inlet

Wójtowicz, Ryszard, Wolak, Paweł
Article
2016
This paper presents an analysis of selected operating parameters of a cyclone with a modified inlet. The modification consisted in an angular arrangement of an inlet channel wall. This can result – in view of previously conducted experiments – in a faster insertion of a dusty gas into a swirl motion, an improvement of particles separation process. The analysis was carried out using numeric CFD simulations. The results were compared to those obtained from simulations and lab-measurements for a cyclone with standard inlet.

Regeneration and utilisation rotary systems of waste technological liquids

Kalinin, Evgeny, Ershov, Sergey, Kozhevnikov, Sergey
Article
2016
The article shows prospects of using regeneration and utilisation rotary systems of waste technological liquids in enclosed local water systems.

The polymer-micellar aggregates as an efficient reducer of the energy losses in pipe flow

Matras, Zbigniew, Kopiczak, Bartosz
Article
2016
The paper presents polymer-micellar aggregates as efficient drag reducers of the energy losses in straight pipe flow. A small amount of high molecular polymers: Polyethylene Oxide, Cetyltrimetyl Ammonium Bromide surfactant and Sodium Salicylate salt additives, are applied to obtain polymer-micellar aggregates formation. An analysis of how polymermicellar additives influence the shape and character of flow resistance curves has been performed. It is documented that for polymer-micellar solutions the stable transitional zone between, the laminar and the turbulent flows are extended toward higher values of the Reynolds number. Occurrence of the third turbulent zone of drag reduction is also observed.

Rectification column: criteria of efficiency

Blinichev, Valerian, Polanski, Andrey, Chagin, Oleg, Krawczyk, Janusz
Article
2016
In the paper analysis of the factors influencing the efficiency of the rectification process is provided. The authors show that existing dependences, equivalent to HETP, cannot be used for calculating rectification plate columns and columns with vortex nozzles, in which the coefficients of mass transfer are substantially dependent on the irrigation density and the gas/steam velocity. The dependence of the efficiency of the packet vortex nozzle as a function of the hydrodynamic regimes of the vapour and liquid phases is proposed.

A comparative analysis methodology of calculation of strength tubesheets by european standards and guidelines for UDT

Celarek, Aneta, Talaga, Jan
Article
2016
This paper presents comparison of calculation methods of the required thickness of the tube sheet in the shell and tube heat exchanger compatible with the standards of the European standard PN - EN 13445-3, and the guidelines of the Polish Office of Technical Inspection (UDT). Details of the methods are illustrated by numerical examples – (calculations) for the selected design of the tubesheet.

Work safety interaction assessment of VOC’s emission under emergency work of IPPC installation

Szatko, Wiesław, Wawszczak, Łukasz
Article
2016
The study evaluated the impact of emissions (VOCs) as a result of the operation of the printing of plant at working positions of those performing their tasks outdoors or in buildings next door. The first part of the paper presents the general characteristics of the process and materials used for printing. The further part shows the results of the modelling of emissions, depending on the operating state of purification (emission in normal conditions and emission in failure state of the afterburner).

Multi-phase flow mixture through a sudden change in channel cross-section

Wiśniowska, Justyna, Witczak, Stanisław, Pietrzak, Marcin
Article
2016
The paper presents the results of a study involving the impact of sudden change of crosssectional area on the flow patterns and local pressure drops for flow of multi-phase mixture. The experiment was conducted in the conditions of a horizontal and vertical flow through a measuring channel. Pressure drops calculated on the basis Kawahara and Lottes methods are compared with experimental data. A system of two interconnected pipes with internal diameters of 40 and 22 mm as well as 46 and 16 mm and a total length of 7 m formed the measurement channel. The experiments involved air, water and oil.

Study of system-wide and structural properties and optimal control of the pre-polyamidation tank

Alexeev, Eugene, Golovushkin, Boris, Labutin, Alexandr, Erofeeva, Elena
Article
2016
The study on system-wide and structural properties of a prepolyamidation tank were performed by simulation. Control channels were selected. An algorithmical synthesis of a tank optimal control system was performed. A designed control system was simulated.