Wyniki wyszukiwania - BazTech

1

Gas hydrates impact on corrosion of the well flow lines material

Poberezhny L., Hrytsanchyk A., Mandryk O., Poberezhna L., Popovych P., Shevchuk O., Mishchuk B., Rudyak Yu.

Archives of Materials Science and Engineering

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2021

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Vol. 110, nr 1

5--17

EN

Purpose: Determination of regularities of joint action of mechanical stresses, formation water and hydrate formation on corrosion of material of flow pipelines. Design/methodology/approach: According to the analysis of reservoir water of the investigated deposits, it was found that the main corrosive component is soluble chlorides. Proposed for corrosion and corrosion-mechanical tests of 6 model environments. An estimation of the influence of stress concentration, depending on the defects of the inner wall of the pipe, was carried out, and the nominal local stresses in the pipeline was carried. Findings: The basic regularities of influence of stress and hydration formation on corrosion and localization of corrosion processes and on the kinetics of deformation of samples are described. For samples made of steel 20 and 17GS, an increase in the velocity of general and local corrosion for samples sustained in the gas hydrate was observed compared to the control results obtained, the coefficient of influence of the gas hydrate on corrosion was calculated. Research limitations/implications: The obtained results are valid for thermobaric operating conditions of well flow lines. Practical implications: The data obtained in the work on the patterns of corrosion processes and the impact of hydrate formation on them will allow to identify potentially dangerous areas of flow lines and prevent emergencies. Originality/value: Based on the analysis of the geometric dimensions of the defects, the effective stress concentration coefficients are calculated, and it is shown that the stresses in the vicinity of corrosion defects in normal operating modes range from 164 to 545 MPa.

2

Increase of the technogenic and ecological safety of the natural gas transportation due to displacement of explosive mixtures with nitrogen

Mandryk O., Vytyaz O., Poberezhny L., Mykhailiuk Y.

Archives of Materials Science and Engineering

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2020

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Vol. 106, nr 1

17--27

EN

Purpose: To ensure technological and environmental safety it is proposed to use the technology of purging pipeline with compressed nitrogen. Design/methodology/approach: The purpose of the calculation is: to get the graph of the concentration distribution (in volume fraction) of nitrogen and natural gas components depending on the distance from the injection point of nitrogen and the duration of the purge process, to determine of parameters of a non-stationary process, and to establish the optimal parameters of the purging process under conditions of the given flow chart. Findings: In the process of displacement of natural gas, the velocity of the front of nitrogen is one of the main quantities that significantly affect the quality of displacement. To assess the actual technological schemes for transporting natural gas, it is necessary to select the velocity of displacement of explosive mixtures. Research limitations/implications: This technology should be implemented in the conditions of a nitrogen pressure higher than 0.25 MPa. Practical implications: Most favourable conditions for the complete displacement of air and subsequent replacement of nitrogen with natural gas were observed for pressures higher from 1.0 to 1.5 MPa. Originality/value: Complex calculations of the volume of air displaced with nitrogen and natural gas in the process of filling the pipeline were conducted in the research. Boundary conditions on the concentration of the mixture of nitrogen and natural gas were identified.

3

The establishment of local energy source as the element of tourist infrastructure in certain Carpathian regions

Mandryk O., Arkhypova L., Pobigun O., Latsyk N.

Journal of New Technologies in Environmental Science

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2018

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Vol. 2, nr 2

98--106

EN

Sustainable development is the development that meets the present day needs and guarantees the same opportunity to future generations. The following interrelated components should be considered with sustainable development: social, economic, environmental and political development. According to the definition developed by the World Tourism Organization (WTO) in 1996 and changes made in 2004, sustainable tourism is a tourist activity, which should keep the cultural component, environmental condition, biodiversity and life support system. And the development of sustainable tourism is seen as a process that, in addition to meeting the needs of tourists and places that receive them, maintains and develops opportunities for the future. According to this definition, sustainable tourism development, taking into account the situation in the country regarding energy and environmental impact of traditional energy sources, should serve the interests of tourists in the economy, society and take into account the ecological environment and use measures for its preservation. Carpathian region has great potential, the wealth of natural resources is one of the main reasons tourists travel, and all the preconditions for sustainable tourism and recreation development. The use of renewable energy sources (RES), which have recently gained popularity because of the individual economic and political factors prevailing in the country fully meets the criteria of modern energy ecological tourism development in the region.

4

Study of adsorption capacity of zeolite for natural and waste water purification from heavy-metal ions

Zasidko I., Polutrenko M., Mandryk O.

Journal of New Technologies in Environmental Science

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2017

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Vol. 1, nr 3

131--139

EN

One of the most important ecological problems is the problem of natural waters contamination with heavy metals. The main causes of pollution are the content of heavy metals in waste water from municipal and industrial enterprises, inefficient wastewater treatment and discharge of such insufficiently treated wastewater into water bodies. Heavy metals delay the processes of water self-cleaning. They form quasi-equilibrium disperse systems, interact with the components of aqueous medium and form hydrated ions, oxyhydrates, and are concentrated due to the formation of complex inorganic and organic compounds [1]. There emerges a real threat to drinking and fishery water supply. By clearing wastewater from heavy metals, we will get clean rivers and wastewater sludge that can be used as fertilizers in agriculture.

5

Determination of spatial constraints and opportunities for implementing renewable energy options for sustainable tourism development in the Carpathian region

Pobigun O., Mandryk O., Arkhypova L.

Journal of New Technologies in Environmental Science

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2017

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Vol. 1, nr 1

36--42

EN

Sustainable development is the development that meets the present day needs and guarantees the same opportunity to future generations. The following interrelated components should be considered with sustainable development: social, economic, environmental and political development. According to the definition developed by the World Tourism Organization (WTO) in 1996 and changes made in 2004, sustainable tourism is a tourist activity, which should keep the cultural component, environmental condition, biodiversity and life support system. And the development of sustainable tourism is seen as a process that, in addition to meeting the needs of tourists and places that receive them, maintains and develops opportunities for the future. According to this definition, sustainable tourism development, taking into account the situation in the country regarding energy and environmental impact of traditional energy sources, should serve the interests of tourists in the economy, society and take into account the ecological environment and use measures for its preservation.

6

An Analysis of the Possibility of Using Coal Technologies to Improve Manoeuvrability, Mobility and Ecological Compatibility of Thermal Power Plant Units

Kulyk M., Mandryk O., Mysak Y.

Geomatics and Environmental Engineering

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2016

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Vol. 10, no. 2

39--42

PL

W artykule przeanalizowano wpływ węglowych jednostek cieplnych dwustopniowego spalania węgla w dodatkowym piecu na zdolność manewrowania i mobilność. Oczekuje się, że zastosowanie separatorów membranowych do wzbogacenia tlenu dostarczanego do paleniska kotła spowoduje ograniczenie ilości tworzących się szkodliwych substancji nawet w przypadku spalania węgla o niskiej jakości.

EN

It was considered the impact on mobility and maneuverability coal thermal units of two-phasic combustion of coal in an additional furnace. Application of membrane separators for enrichment of oxygen supplied to the furnace of the boiler, it is expected to reduce the formation of harmful substances, even when burning low quality coal.

7

Contamination of soils with heavy metals in the industrialized region of western Ukraine: western Podole Upland

Mandryk O., Radlovska K.

Geomatics and Environmental Engineering

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2013

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Vol. 7, no. 1

75--82

EN

Contamination of surface soil horizons with heavy metals is usually related to long-lasting air pollution and might potentially affect soil fauna, as well as plant growth, harvesting and health of plant consumer. In order to estimate potential health risk, we investigated surface and subsurface soil contamination with heavy metals in avable area in one of the most industrialized region of western Ukraine, western Podole Upland. In total 80 samples from the area of about 35 km2 were sampled and analyzed for content of zinc, nickel, copper, cobalt, lead, arsenic and quicksilver. The research revealed several anomalies, where the content of these elements exceed 3-5 Ukrainian quality guidance for avable soils. Soils are the most contaminated with arsenic and quicksilver, with maximum concentrations exceeding local geochemical background about 20 times. Maximum nickel and zinc concentrations are about 10 times higher than the background while the content of copper and cobalt is elevated up to several times.

PL

Zanieczyszczenie powierzchni gleb metalami ciężkimi jest zazwyczaj wiązane z długotrwałym zanieczyszczeniem powietrza i może wpłynąć na faunę glebową, a także na wzrost roślin oraz zdrowie konsumentów. W celu oszacowania potencjalnego zagrożenia dla zdrowa autorzy badali zanieczyszczenie metalami ciężkimi powierzchni gruntów ornych w jednym z najbardziej uprzemysłowionych regionów zachodniej Ukrainy - zachodnim Podolu. Z powierzchni około 35 km2 pobrano w sumie 80 próbek, które przebadano i przeanalizowano pod względem zawartości cynku, niklu, miedzi, kobaltu, ołowiu, arsenu i rtęci. Badania wykazały liczne nieprawidłowości. Zawartość tych pierwiastków przekracza 3-5 ukraińskich norm jakości gleb uprawnych. Gleby te są najbardziej zanieczyszczone związkami arsenu i rtęci, których maksymalne stężenia lokalnie przekraczają normy geochemiczne aż 20-krotnie. Stężenie niklu i cynku wynosi maksymalnie około 10 razy więcej, niż przewiduje norma, podczas gdy zawartość miedzi i kobaltu jest podwyższona kilkukrotnie.