New non-system physical quantities for vibration monitoring of transient processes at hydropower facilities, integral vibratory accelerations

Vedmitskyi, Yurii G.; Kukharchuk, Vasyl; Hraniak, Valerii; Wójcik, Waldemar; Zhassandykyzy, Maral; Yesmakhanova, Laura

doi:10.15199/48.2017.03.17

Cited by 13 publications

(13 citation statements)

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“…1. The absorption of the main components of flue gases of boiler installations in the range of 4-4.5 microns (2200-2500 cm -1 ) is presented [5,8,16].…”

Section: Methodsmentioning

confidence: 99%

Tool Control the Concentration of Carbon Dioxide in the Flue Gas Boilers Based on the Optical Absorption Method

Vasilevskyi

Dudatiev

Ovchynnykov

2019

IAPGOS

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The methodology for controlling the concentration of carbon dioxide in flue gases from boilers is an optical absorption method with improved metrological characteristics. Studies done in the article, provided the new, scientifically-based theoretical and practical results that are essential for improving the accuracy at the required speed process, control the carbon dioxide concentration in dual gas boilers based on the optical absorption method with compensation effect on the factors optical converter.

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“…1. The absorption of the main components of flue gases of boiler installations in the range of 4-4.5 microns (2200-2500 cm -1 ) is presented [5,8,16].…”

Section: Methodsmentioning

confidence: 99%

Tool Control the Concentration of Carbon Dioxide in the Flue Gas Boilers Based on the Optical Absorption Method

Vasilevskyi

Dudatiev

Ovchynnykov

2019

IAPGOS

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“…However, they have significant dimensions and low productivity [Sevostianov, 2020, Vasilevskyi, 2014, Vasilevskyi, 2016. Wastewater is supplied to the settler tank and during settling, lighter contaminants float to the surface, while heavy particles descend to the bottom of the structure, and then they are removed [Vedmitskyi, 2017].…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

Development of the Scheme of the Installation for Mechanical Wastewater Treatment

Sevostianov¹,

Ivanchuk²,

Polishchuk³

et al. 2021

J. Ecol. Eng.

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The paper presents the schemes of various equipment for the mechanical treatment of the industrial and domestic wastewater, which allows removing it from the main part of the pollution. An examination of the shortcomings of the known equipment with the aim of its improvement was conducted. As a result, an installation scheme for continuous high-performance mechanical wastewater treatment was proposed. In contrast to the known equipment, the proposed installation provides a three-staged treatment of wastewater with the help of the two pairs of gratings-for preliminary treatment (removal of large-size pollutions) and by filtration through the two metallic sieves-for normal and fine treatment (removal of small-size mechanical pollutions). The installation consists of highly-efficient appliances for the cleaning of filtering elements in the course of realization of the working process, which provides stable high productivity of treatment. The installation has simple reliable design and low energy expenses. The paper contains the formulas for determining of main operational parameters of the installation: the change of the cross-sectional area of the filtering elements and productivity of the working process, periodicity of cleaning of gratings and sieves, the necessary electric power of installations drives. These formulas can be a basis for further research of installation and for elaboration of a method of its design calculation.

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“…However, there are well-known methods of qualitative and quantitative estimation of transients that allow us to study transitional regimes without solving differential equations. For example, for studying the stability of dynamic systems, A. Hurwitz developed criteria on which it is possible to draw conclusions about their stability or instability, based on the coefficients for the terms of equations [10][11][12].…”

Section: Analytical Substantiation Of the Existence Of Non-stop Periomentioning

confidence: 99%

“…where: a 0 =1; a 1 =α/m; a 2 =c z /m; a 3 =∆QS 2 /βW r . Since, the coefficients a 0 , a 1 , a 2 , a 3 positive, then this transition process has oscillatory character [9,10]. Let's write the A. Hurwitz matrix of stability [11]: (10) .…”

Section: Analytical Substantiation Of the Existence Of Non-stop Periomentioning

confidence: 99%

“…It was hypothesized that there is a self-oscillation in this dynamic system of the valve pulser. To analyze this hypothesis, let's dwell on the energy ratios that most fully characterize the oscillation process [7,10]. A stable oscillatory process is possible in the case when there is a balance of energy in the system, that is, when the energy coming from the energy supply compensates for the energy expended to overcome the resistance forces.…”

Section: Fig 3 Vp Working Cycle Theoretical Diagrammentioning

confidence: 99%

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Terms of the stability for the control valve of the hydraulic impulse drive of vibrating and vibro-impact machines

Iskovych-Lototsky

Kots

Ivanchuk

et al. 2019

ELECTROTECHNICAL REVIEW

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The working process and regularities of the functioning of vibrating and vibro-impact machines based on hydroimpulse drive with a singlestage valve pulser are analyzed. The essential characteristics determining the conditions for the excitation and existence of periodic oscillations of the valve-pulser shut-off valve are determined. Using the criterion of A. Hurwitz, based on the differential equation of motion, the existence of undamped periodic oscillations of the valve-pulser shut-off valve is analytically justified.Streszczenie. Przeanalizowano działanie i regularność pracy maszyn wibracyjnych oraz maszyn poddawanych wibracjom opartych na napędzie hydro-impulsowym z jednostopniowym zaworem impulsowym. Określono podstawowe cechy wpływające na warunki wzbudzenia oraz występowania drgań okresowych zaworu impulsowego. Przy zastosowaniu kryterium A. Hurwitza, opartego na równaniu różniczkowym ruchu, istnienie nietłumionych drgań okresowych zaworu impulsowego jest analitycznie uzasadnione. (Warunki stabilności zaworu sterującego hydraulicznym napędem impulsowym maszyn wibracyjnych oraz maszyn poddawanych wibracjom).

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New non-system physical quantities for vibration monitoring of transient processes at hydropower facilities, integral vibratory accelerations

Cited by 13 publications

References 0 publications

Tool Control the Concentration of Carbon Dioxide in the Flue Gas Boilers Based on the Optical Absorption Method

Tool Control the Concentration of Carbon Dioxide in the Flue Gas Boilers Based on the Optical Absorption Method

Development of the Scheme of the Installation for Mechanical Wastewater Treatment

Terms of the stability for the control valve of the hydraulic impulse drive of vibrating and vibro-impact machines

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