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Tytuł:
Developing measures to eliminate of hydrate formation in underground gas storages
Autorzy:
Volovetskyi, V. B.
Doroshenko, Ya. V.
Bugai, A. O.
Kogut, G. M.
Raiter, P. M.
Femiak, Y. M.
Bondarenko, R. V.
Powiązania:
https://bibliotekanauki.pl/articles/2172156.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
well
flowline
hydrate formation
local constraint
regulating choke
studnia
powstawanie hydratów
współczynnik ograniczenia
dławik
Opis:
Purpose The objective of this article is the analysys of methods for preventing and eliminating hydrates formations, classifying them and choosing the best ones for use in underground gas storage facilities. Comprehensive measures for the stable operation of gas storage facilities in the presence of conditions for the occurrence of hydrates formations were developed. Zones, being potentially prone to the hydrates formation during the gas storage facilities operation were identified. Design/methodology/approach The operational parameters of gas storage wells during gas withdrawal are analyzed. The identified wells were operated under difficult conditions due to the deposition of hydrates on the wellheads, in flowlines and process equipment of gas storage facilities. The places of the highest hydrates accumulation on underground gas storages were determined: from the bottomhole of wells to the gas purification unit of the gas gathering station. Hydrate-prone zones were identified by computational fluid dynamic (CFD) modeling at the location of regulating choke installations in underground gas storage facilities. Findings The zones of the greatest hydrates accumulation on underground gas storages were determined: from the bottomhole of wells to the gas purification unit of the gas gathering station. The analysis of the methods used in gas storage facilities of Ukraine to prevent and eliminate hydrates formation was out. A set of measures was proposed to prevent the hydrates formation in storage facilities to ensure their stable operation. Based on the Euler approach (Mixture model) by CFD modeling, zones prone to hydrates formation were determined at the installation site of regulating chokes in underground gas storages. The influence of the degree of fittings opening on the location of potential zones prone to hydrates formation was estimated. The gas-dynamic processes in the internal cavity of the gas pipeline at the installation site of the control fittings were studied and their influence on the distribution of bulk particles of the gaseous and liquid phases was established. Based on the studies performed, it was recommended to change periodically the mode of well operation for a certain time by opening or closing the regulating choke under favorable conditions for the formation of hydrates, especially at low ambient temperatures. Research limitations/implications The obtained results of experimental studies and calculations showed that in order to solve the problem of hydrates formation at gas storage facilities, it is advisable to use diverse measures through the introduction of modern intelligent systems for monitoring and controlling the technological process. Further refinement of the algorithm of the proposed monitoring and control system with its approbation in production was provided. Practical implications The results of the experimental studies and CFD modeling carried out allowed providing a more reasonable approach to the application of various available methods and measures to prevent hydrates formation in underground gas storage facilities. This approach made it possible to develop new effective ways and measures to prevent such complication. Originality/value Based on the conducted experimental studies and modeling, the major zones prone to hydrates formation in underground gas storages were determined. The developed measures will allow timely detection and prevention of hydrates formation at gas storage facilities are original.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2022, 111, 2; 64--77
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical evaluation of the quality of nanostructures synthesized on the surface of indium phosphide
Autorzy:
Kovachov, S.S.
Bogdanov, I.T.
Pimenov, D.O.
Bondarenko, V.V.
Konovalenko, A.A.
Skurska, M.M.
Konovalenko, I.S.
Suchikova, Y.O.
Powiązania:
https://bibliotekanauki.pl/articles/2175768.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
semiconductors
nanostructures
chemical criterion
indium phosphide
quality indicators
półprzewodniki
nanostruktury
kryterium chemiczne
fosforek indu
wskaźniki jakości
Opis:
Purpose: The article proposes a methodology for determining the chemical quality criterion of porous layers synthesized on the surface of semiconductors, based on taking into account the chemical parameters of the surface that can affect the properties of nanostructures. Design/methodology/approach: The chemical quality criterion was evaluated in terms of stoichiometry, stability of structures over time, uniformity of distribution over the surface, and the presence of an oxide phase. As an example, a calculation is demonstrated for the por-InP/InP structure synthesized on a mono-InP surface. The results of calculating the chemical quality criterion were evaluated using the Harrington scale to rank samples by quality level. Findings: A chemical criterion for the quality of porous layers synthesized on the surface of semiconductors has been developed. This criterion contains a set of indicators sufficient for a comprehensive assessment of the surface condition and is universal in nature. The studies carried out make it possible to reasonably approach the determination of the modes of electrochemical processing of semiconductors and open up new perspectives in the construction of a model of self-organization of a porous structure. Research limitations/implications: The chemical quality criterion does not allow evaluating the obtained nanostructures in terms of geometric parameters. Therefore, in the future, there is a need to develop a morphological quality criterion and determine a methodology for assessing a generalized quality criterion for nanostructures synthesized on the surface of semiconductors, which may include economic, environmental, technological indicators, and the like. Practical implications: Study results are expedient from a practical point of view, since they make it possible to reasonably approach the determination of the modes of electrochemical processing of semiconductors, synthesize nanostructures with predetermined properties, and create standard samples of nanomaterial composition. Originality/value: Methodology for assessing the quality of porous semiconductors by a chemical criterion has been applied for the first time in engineering science. The article will be useful to engineers, who are engaged in the synthesis of nanostructures, researchers and scientists, as well as specialists in nanometrology.
Źródło:
Archives of Materials Science and Engineering; 2021, 110, 1; 18--26
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Functional model for the synthesis of nanostructures of the given quality level
Autorzy:
Suchikova, Y.O.
Kovachov, S.S.
Shishkin, G.O.
Pimenov, D.O.
Lazarenko, A.S.
Bondarenko, V.V.
Bogdanov, I.T.
Powiązania:
https://bibliotekanauki.pl/articles/2175807.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
functional model
electrochemical etching
quality level
semiconductors
nanostructures
IDEF0 methodology
model funkcjonalny
trawienie elektrochemiczne
poziom jakości
półprzewodniki
nanostruktury
metodologia IDEF0
Opis:
Purpose: The aim of this paper is to develop a functional model for the synthesis of nanostructures of the given quality level, which will allow to effectively control the process of nanopatterning on the surface of semiconductors with tunable properties. Design/methodology/approach: The paper uses the IDEF0 methodology, which focuses on the functional design of the system under study and describes all the necessary processes with an accuracy sufficient for an unambiguous modelling of the system's activity. Based on this methodology, we have developed a functional model for the synthesis of nanostructures of the given quality level and tested its effectiveness through practice. Findings: The paper introduces a functional model for the synthesis of nanostructures on the surface of the given quality level semiconductors and identifies the main factors affecting the quality of nanostructures as well as the mechanisms for controlling the formation of porous layers with tunable properties. Using the example of etching single-crystal indium phosphide electrochemically in a hydrochloric acid solution, we demonstrate that the application of the suggested model provides a means of forming nanostructures with tunable properties, assessing the quality level of the nanostructures obtained and bringing the parameters in line with the reference indicators at a qualitatively new level. Research limitations/implications: Functional modelling using the IDEF0 methodology is widely used when process control is required. In this study it has been applied to control the synthesis of nanostructures of the given quality level on the surface of semiconductors. However, these studies require continuation, namely, the establishment of correlations between the technological and resource factors of synthesis and the acquired properties of nanostructures. Practical implications: This study has a significant practical effect. Firstly, it shows that functional modelling can reduce the time required to form large batches of the given quality level nanostructures. This has made it possible to substantiate the choice of the initial semiconductor parameters and nanostructure synthesis modes in industrial production from the theoretical and empirical perspective. Secondly, the presented methodology can be applied to control the synthesis of other nanostructures with desired properties and to reduce the expenses required when resources are depleted and the cost of raw materials is high. Originality/value: This paper is the first to apply the IDEF0 methodology to control the given quality nanostructure synthesis. This paper will be of value to engineers who are engaged in the synthesis of nanostructures, to researchers and scientists as well as to students studying nanotechnology.
Źródło:
Archives of Materials Science and Engineering; 2021, 107, 2; 72--84
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Possibility to Control an Atom Motion in a FCC Iron Nanocluster
Autorzy:
Bondarenko, N.
Nedolya, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030620.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.70.Ns
07.05.Pt
36.40.-c
61.46.Hk
61.46.Bc
Opis:
The energy of the isolated iron nanocluster was calculated by molecular mechanics method using the Lennard-Jones potential depending on the position of impurity carbon atom and substitutional atoms of nickel. The cluster included a carbon atom, that drifted from an inside octahedral interstice to a direction ⟨022⟩ to the surface directly or to a tetrahedral interstice in ⟨1̅11⟩ direction and after that in ⟨222⟩ direction to the surface. In addition one of 14 iron atoms was replaced by a nickel atom (or pair atoms), the position of which was changing during simulation. It is shown that there were positions of a nickel atom that significantly affected nanoclusters energy. The calculation results indicated that position of a carbon atom in the octahedral interstice was more energetically favorable than tetrahedral interstice in the case of fcc nanocluster. On the other side, the potential barrier was smaller in the direction ⟨1̅11⟩ than in the direction ⟨022⟩. This indicates that there are two ways for carbon atom to drift to the surface of the nanocluster. The positions of nickel atoms were identified, which significantly affected the height of potential barriers of a tetrahedral and an octahedral interstice and determined the possible direction of carbon atoms drift. This allows manipulating atoms at the surface of nanocluster.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 277-279
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conceptual approach to select parameters of hydrostatic and mechanical transmissions for wheel tractors designed for agricultural operations
Autorzy:
Taran, I.
Bondarenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/224031.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrostatic transmission
mechanical transmission
wheel tractor
braking process
controllability
braking efficiency
przekładnia hydrostatyczna
przekładnia mechaniczna
ciągnik kołowy
proces hamowania
sterowność
skuteczność hamowania
Opis:
As a result of theoretical and experimental efforts, innovative scientifically grounded conceptual approach to select hydrostatic and mechanical transmissions (HMT) for wheel tractors designed for agricultural operations has been proposed. The approach is characterized by focusing on kinematic parameters, power parameters, and energy parameters of the transmission while performing technological operation “plowing”; it also takes into consideration braking features of a tractor in the context of various braking types. Application of the approach offers an opportunity to improve technical level of transmissions while updating current wheel tractors and designing new ones; moreover, that will better controllability as well as braking efficiency. The conceptual approach developed on the basis of proposed techniques and applied mathematical models makes possible to determine rational structure and basic design parameters of two-flow HMTs while designing; it also helps formulate recommendations concerning a technique for service braking and emergency braking under specific operational conditions.
Źródło:
Archives of Transport; 2017, 41, 1; 89-100
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of MIS Devices by Irradiation and High-Field Electron Injection Treatments
Autorzy:
Andreev, D.
Bondarenko, G.
Andreev, V.
Maslovsky, V.
Stolyarov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030209.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Ht
72.20.Jv
73.20.At
73.40.Qv
73.40.Ty
77.22.Jp
77.55.-g
Opis:
Methods to modify gate dielectrics of MIS structures by irradiation treatments and high-field electron injection into dielectric are considered. In addition, distinctive features of these methods used to correct parameters of MIS devices are studied. It was found out that negative charge, accumulating in the thin film of phosphosilicate glass (PSG) of the MIS structure having a two-layer gate dielectric SiO_2-PSG under the high-field injection or during the irradiation treatment can be used to correct the threshold voltage to improve the charge stability and raise the voltage of breakdown for the MIS devices. It is proved that the density of electron traps rises with the increasing thickness of the PSG film. In this paper a method to modify electrophysical characteristics of MIS structures by the high-field tunnel injection of electrons into the gate dielectric under the mode of controlled current stress is proposed. The method allows to monitor changing of MIS structure parameters directly during the modification process.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 245-248
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testy komputerowe jako sposób sprawdzenia wiedzy uczniów
Computer testing as a way to test students’ knowledge
Autorzy:
Shaida, N. P.
Ostopolets, I. J.
Bondarenko, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/115323.pdf
Data publikacji:
2016
Wydawca:
Wyższa Szkoła Techniczna w Katowicach
Tematy:
technologia informacyjna
testy
szkolenia komputerowe
test komputerowy
information technology
tests
computer training
computer testing
Opis:
Nadzór nad testami wiedzy studentów z wykorzystaniem komputera zwiększa obiektywizm i wiarygodność wyników. Rozwiązanie to daje możliwość nie tylko do sprawdzania wiedzy uczniów, ale także do ich poprawiania. Pomaga zwiększyć poziom przyswojenia jednostek dydaktycznych dyscypliny. Pozwala także zaoszczędzić czas pracy nauczyciela poświęcany do sprawdzania prac uczniów. Badania eksperymentalne potwierdziły wysoki stopień gotowości studentów do postrzegania i zapamiętywania informacji w testach komputerowych opartych na szkoleniach. Pozwala to na personalizowanie edukacji, z uwzględnieniem indywidualnych cech uczniów i samego procesu uczenia się.
Test control of knowledge of students using a computer enhances objectivity and reliability of the results. It gives an opportunity not only to check the students’ knowledge, but also to correct them. It helps increase the level of assimilation of didactic units of the discipline. It allows you to save the time of the teacher to check student work. Experimental research has confirmed a high degree of readiness of students to perceive and remember information in a training computer-based testing. This allows to personalize the education, taking into account the individual characteristics of students and the learning process itself.
Źródło:
Zeszyty Naukowe Wyższej Szkoły Technicznej w Katowicach; 2016, 8; 263-274
2082-7016
2450-5552
Pojawia się w:
Zeszyty Naukowe Wyższej Szkoły Technicznej w Katowicach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Medodika i ehsperimentalnye issledovanija morfologicheskikh i prochnostnykh kharakteristik obertok kukuruzy
Methods and experimental studies of morphological and strength characteristics wrappers corn
Autorzy:
Bondarenko, A.
Gruban, V.
Powiązania:
https://bibliotekanauki.pl/articles/77832.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
experimental study
anatomical study
strength property
maize
leaf
corn cob
harvesting
cleaning process
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 2
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of MOS Devices by High-Field Electron Injection and Arc Plasma Jet Treatment
Autorzy:
Andreev, V.
Bondarenko, G.
Maslovsky, V.
Stolyarov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402221.pdf
Data publikacji:
2015-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Qv
73.40.Gk
Opis:
Methods of modification of gate dielectrics of the MOS structures by high-field electron injection and arc plasma jet treatment were studied. It is possible to use them for correction of parameters, decreasing defects number and increasing reliability of MOS devices. It was found that the negative charge accumulated in the film of the phosphorus-silicate glass of the MOS structures with the two-layer gate dielectric SiO₂-phosphorus-silicate glass under the high-field electron injection can be used for modification of devices with the same structures. It is shown that the injection-thermal treatment allows to find and exclude MOS structures with defects of isolation and charge defects. Arc plasma jet treatment was found to improve characteristics of the MOS devices. These treatments increase injection and radiation resistance of the gate dielectric by creating the needed density of electron traps in the bulk of SiO₂ film.
Źródło:
Acta Physica Polonica A; 2015, 128, 5; 887-890
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vosstanovlenije razrushennogo kollektora v Kharkove
Reconstruction of destroyed collector in Kharkiv
Autorzy:
Goncharenko, D.
Bondarenko, D.
Garmash, A.
Powiązania:
https://bibliotekanauki.pl/articles/77573.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
collector
sewer system
analysis
corrosion
repair work
reinforcement
condition
Kharkiv
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of Gate Dielectric in MOS Devices by Injection-Thermal and Plasma Treatments
Autorzy:
Andreev, V.
Bondarenko, G.
Maslovsky, V.
Stolyarov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1381776.pdf
Data publikacji:
2014-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Qv
73.40.Gk
Opis:
The influence of injection-thermal and plasma treatments on the characteristics of the MOS-structure is studied. It is shown that the thermal stable part of the negative charge which accumulates in the phosphorus-silicate glass (PSG) film in the structures with the two-layer gate dielectric $SiO_2$-PSG under high-field Fowler-Nordheim electron injection can be used for the characteristics modification of MOS-structures with above described structure. The injection-thermal and plasma treatments of MOS-structures are offered to use for improving the reliability and finding the samples which have the charge defects. It is found that using the injection-thermal and plasma treatments allows to increase the injection and radiation stability of the dielectric films of MOS-structures due to structural changes in the $SiO_2$ film and $Si-SiO_2$ interface.
Źródło:
Acta Physica Polonica A; 2014, 125, 6; 1371-1373
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Researches of influence of electric current on tribounit "Wheel-rail"
Issledovanie vlijanija ehlectricheskogo toka na tribosoprjazhenie 'Koleso-rel'c'
Autorzy:
Gorbynov, N.
Nozgenko, V.
Nozgenko, E.
Kluev, S.
Bondarenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/793000.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
electrical current
coupling
heat
mechanical wear
friction coefficient
wheel-rail interaction
railway rolling stock
exploitation
railway transport
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 1
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the main characteristics of the small waterplane area twin hull ships at the initial stage of design
Autorzy:
Bondarenko, O. V.
Boiko, A. P.
Seropyan, I. R.
Powiązania:
https://bibliotekanauki.pl/articles/258950.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
small waterplane area twin hull ship
mathematical model
constraints
objective function
optimization
Opis:
The basic selecting peculiarities of the optimal project characteristics of the small waterplane area twin hull ships compared to conventional ships are considered. The description of the mathematical model and the ship operating model is given. The choice of the optimization method is justified.
Źródło:
Polish Maritime Research; 2013, 1; 11-22
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grafoanaliticheskij analiz sostojanijj i perekhodov v vozmozhnyje sostojanija aktivno rezervirujemojj tekhnicheskojj sistemy
Graphic analytical analysis and transitions in possible become active redundant technical system
Autorzy:
Boyko, A.
Bondarenko, O.
Savchenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/78056.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
graphical analysis
theoretical research
transition
machine work
failure
restoration
technical system
exploitation
Opis:
The results of theoretical researches are resulted for the complex estimation of the common state and tendencies of changes of reliable work of machines for collection of corn. The stochastic model of the states and transitions of subsystems is built at the passive reserving.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 4
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Issledovanie dinamiki izmenenijj pokazatelejj hadezhnosti passivno rezervirovannojj sistemy pri ispravnom isnovnom i dublirujushhem ehlementakh
Study of dynamics of change of reliability indices passive system redundancy with intact primary and backup elements
Autorzy:
Bojko, A.
Bondarenko, A.
Savchenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/76849.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
willingness
work
failure-free operation
reliability system
redundancy system
Opis:
В статье рассмотрена пассивно резервированная система работающая в режиме постепенного накопления повреждений. Установлены закономерности изменения основных показателей надежности, таких как вероятность безотказной работы и среднее время работы до отказа.
The paper describes passive redundant system is in gradual accumulation of damage. The regularities of changes in basic reliability indices such as probability of failure-free operation and mean time to failure.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 3
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
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