Research of methods for oil kinematic viscosity calculation in the oil-trunk pipeline

Aralov, Oleg V.; Buyanov, Ivan V.; Savanin, A. S.; Iordansky, Evgeny I.

doi:10.28999/2541-9595-2017-7-5-97-105

Cited by 5 publications

(2 citation statements)

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“…В некоторых случаях увеличение вязкости нефти при понижении температуры приводит к недопустимым напряжениям на стенках трубы и остановке транспортировки. В работе [1] проведены исследования зависимости кинематической вязкости нефти и смесей нефти от температуры, а также проанализированы существующие формулы для расчета кинематической вязкости нефти в магистральных трубопроводах.…”

Section: численный расчет гидродинамики теплоносителей с учетом завис...unclassified

“…В литературе применяются различные зависимости вязкости от температуры. В нефтяной отрасли при расчете кинематической вязкости, зависящей от температуры, применяется формула Вальтера [1] lg(lg(ν + 0, 8)) = a + b lg T…”

Section: численный расчет гидродинамики теплоносителей с учетом завис...unclassified

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Numerical calculation of the hydrodynamics of heat carriers, taking into account the dependence ofviscosity on temperature

Кurmanova¹,

Jaichibekov²,

Volkov³

et al. 2022

bulmathenu

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The article is devoted to the study of the hydrodynamics of heat carriers in heat exchangers. Giventhe widespread use of this device, increasing its thermal and hydraulic characteristics has become so important for theirdesigners. In the work, the calculation of non-stationary flows of liquids through the heat exchanger tubes is carried out.Water ("hot" coolant) and oil ("cold" coolant) are used as heat carriers, between which heat exchange occurs through thesolid surface of the pipeline, which is the boundary between the heat carriers. When calculating the movement of oil, thefact was taken into account that the dynamic viscosity depends very much on temperature and, depending on temperature,the Reynolds numbers also change. And, as a consequence, when flowing through a sufficiently thin channel, the flow regimechanges, namely, the transition from the laminar flow regime to the turbulent one is manifested, while this effect is notobserved with the analytical calculation method for constant viscosity. The Reynolds-averaged Navier-Stokes equations,closed using the turbulence model, were used for numerical modeling of fluid dynamics of heat carriers. Verification of theheat exchanger calculations was carried out in the software package "Ansys Fluent".

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Section: численный расчет гидродинамики теплоносителей с учетом завис...unclassified

Numerical calculation of the hydrodynamics of heat carriers, taking into account the dependence ofviscosity on temperature

Кurmanova¹,

Jaichibekov²,

Volkov³

et al. 2022

bulmathenu

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Key Research Insights into Dependence Between Turbine Flow Transducer Conversion Coefficients and Reynolds Number

Aralov

Buyanov

2021

HoBMSTU.SME

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The paper focuses on the key findings of the first experimental studies on assessing the dependence of the relative deviation of the conversion coefficients of the turbine flow transducer KTFT on the physicochemical properties of oil and oil products, as well as test conditions. The studies were carried out on a specialized calibration stand and on three systems for measuring the quantity and quality indicators of oil / oil products, operated in the main pipeline transport under various climatic conditions. Relying on the obtained experimental data, we assessed the influence of test conditions on KTFT and established correlation dependences between the kinematic viscosity, density, temperature and excess pressure. The study shows that the kinematic viscosity and density of the working medium, i.e., oil / oil products, as well as the Reynolds number Re, have the greatest influence on KTFT. Furthermore, with a change in the volumetric flow rate and kinematic viscosity at one object, it is possible to predict the change in KTFT in the entire range of the volumetric flow rate, relying on Re values. Findings of research show that the tested turbine flow transducer DN 250-1.6 can be operated when Re > 7600

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Reuse of low sulfur oil residues as a base for boiler and marine fuel

Zvereva

Makarova

Bakhtiyarova

et al. 2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. A complex of various physico-chemical methods has been studied to explore the possibilities of reuse of oil residues (oil sludge) of low-sulfur high-paraffin oil deposits of the Mangyshlak peninsula (Kazakhstan) as a promising raw material for boiler and marine fuel with improved operational and environmental characteristics.METHODS. Determination of the conditional viscosity of oil sludge (in degrees Engler, ° E) was carried out using an Engler viscometer VU-M-PCP according to GOST 6258-85 «Petroleum products. The method of determining the conditional viscosity». Studies of the lowest working heat of combustion of oil sludge were carried out using an adiabatic bomb calorimeter ABK-1B (Russia) according to GOST 21261-91 "Petroleum products. Method for determining the highest heat of combustion and calculation of the lowest heat of combustion". Determination of the mass fraction of sulfur in the studied oil sludge was also carried out using an adiabatic bomb calorimeter ABK-1B (Russia) according to GOST 3877-88 «Petroleum products. Method of determination of sulfur by burning in a calorimetric bomb». To analyze the results obtained, data obtained using the nuclear magnetic resonance method were used. Proton NMR spectra were recorded on a Bruker AVANCE III NMR spectrometer operating at a frequency of 600.13 MHz for 1H and equipped with a highresolution inverse sensor for three cores (TXI, 5 mm). Data processing and analysis were performed using Bruker Topspin 3.6.1.RESULTS. It is shown that in terms of heat of combustion and viscosity properties at temperatures above 50 oC, this oil sludge is similar to boiler fuel oil M100. It was found that the use of carbonate sludge of chemical water treatment at a concentration of 0.1 wt. % allows you to further reduce the viscosity by 5-6% and reduce the sulfur content in the combustion products, without reducing the lower working heat of combustion of the oil product. The complex nature of the relationship between the width of NMR lines and viscous properties has been revealed, which may indicate the existence of associates of highmolecular paraffins even in slightly viscous liquid petroleum products. The nature and characteristic sizes of the resulting associates are discussed. It is shown that the addition of medium-distillate diesel fractions will make it possible to obtain a better fuel option for marine engines, gas turbine and boiler installations with a reduced amount of resinous-asphaltene substances, reduced viscosity values and solidification temperatures, high heat of combustion and low sulfur content.СONCLUSION. The conducted complex of physico-chemical studies has shown the possibility of using low-sulfur Mangyshlak oil sludge as a basis for obtaining fuel for marine engines, gas turbine and boiler plants, steam boilers and industrial furnaces.

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Research of methods for oil kinematic viscosity calculation in the oil-trunk pipeline

Cited by 5 publications

References 0 publications

Numerical calculation of the hydrodynamics of heat carriers, taking into account the dependence ofviscosity on temperature

Numerical calculation of the hydrodynamics of heat carriers, taking into account the dependence ofviscosity on temperature

Key Research Insights into Dependence Between Turbine Flow Transducer Conversion Coefficients and Reynolds Number

Reuse of low sulfur oil residues as a base for boiler and marine fuel

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