scholarly journals Simulation of oil pipeline shutdown and restart modes

2021 ◽  
Vol 316 (1) ◽  
pp. 15-23
Author(s):  
T. T. Bekibayev ◽  
◽  
U. K. Zhapbasbayev ◽  
G. I. Ramazanova ◽  
A. D. Minghat ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Rheological Properties ◽  
Hydraulic Calculation ◽  
Stationary Processes ◽  
Oil Pipeline ◽  
Heating Furnaces ◽  
Optimum Parameters ◽  
Pumping Stations ◽  
Pumping Units

The paper is devoted to the simulating of non-stationary processes of shutdown and restart on the example of a section of the Zhetybai-Uzen “hot” oil pipeline. A mathematical model of thermal-hydraulic calculation is given taking into account the rheological properties of the pumping oil. The special module of the SmartTran software developed by the work’s authors carried out the calculations. In the calculations, the decrease in time of oil temperature in the pipeline during cooling and the increase in oil pressure, temperature, velocity after the restart are determined. In addition, the calculations determine the power of pumping units, heating furnaces and the power consumption, which are necessary for restart of the pipeline after the shutdown. Simulation the processes of the pipeline cooling and restart after a shutdown makes it possible choosing the optimum parameters of pumping units at pumping stations and the time of safe shutdown of the oil pipeline.

scholarly journals Achieving reliability and energy savings in operate of pumping stations

2021 ◽  
Vol 264 ◽  
pp. 03003
Author(s):  
Oleg Glovatskii ◽  
Jaloliddin Rashidov ◽  
Вoybek Kholbutaev ◽  
Khayrullo Tuychiev
Keyword(s):  
Energy Savings ◽  
Operating Conditions ◽  
Hydraulic Calculation ◽  
Practical Significance ◽  
Flow Section ◽  
Resource Saving ◽  
Irrigation Systems ◽  
Additional Energy ◽  
Pumping Stations ◽  
Pumping Units

Hydromechanical equipment of pumping stations of irrigation systems, including the main equipment of pumping stations of the Amu-Bukhara machine channel, was taken as the object of research. The study aims to assess the operating conditions of pumping stations and improve the main units' reliability by developing new units that ensure reliable and resource-saving operations. An important consequence of using new elements of irrigation systems during reconstruction is an increase in the unit capacity of regulated pumping units, which gives additional energy savings and reduces technological costs by 15-20%. The practical significance of the research results is based on the developed methods of hydraulic calculation of the flow in the flow section of the pumps, the assessment of reliability during operation under various conditions of the quality of the pumped water, and the criteria of its state.

scholarly journals Effect of parallel connection of pumping units on operating costs of pumping station

2019 ◽  
Vol 97 ◽  
pp. 05014 ◽  
Author(s):  
Nazir Ikramov ◽  
Eduard Kan ◽  
Mirasil Mirzoev ◽  
Takhir Majidov
Keyword(s):  
Irrigation System ◽  
Operating Mode ◽  
Operating Costs ◽  
Hydraulic Calculation ◽  
Parallel Operation ◽  
Capital Costs ◽  
Pumping Stations ◽  
Pressure Pipeline ◽  
Large Irrigation ◽  
Pumping Units

In Uzbekistan, as well as in many other countries of the world, pumping units operate in parallel into a common pressure pipeline at some pumping stations of the irrigation system. This was done mainly to save on the capital costs of the pipeline. Analysis and hydraulic calculation of the existing large irrigation pumping stations with pumping units operating in parallel showed that at some of them the conditions of parallel operation of pumping units were impaired. As a result, a negative hydraulic process arises, in the form of self-induced vibrations of the water flow in the pipeline, which leads to various damage and deformation of the pressure pipeline and pipeline supports. The calculations showed that with different modes of pumping units operating together, the power consumption at the Amu-Bukhara-1 and Namangan pumping stations, accounting for one unit increases by 0.72 ... 6.53%, and at the Amu-Bukhara-2 and Amu-Zang-2 pumping stations, this index, on the contrary, decreases by 0.32 ... 1.67%. Therefore, a properly selected operating mode of parallel-connected pumping units will lead to a decrease in operating costs, i.e. decrease in the prime cost of raised water.

scholarly journals Full-scale testing of water intake pumps of pumping stations

2019 ◽  
Vol 97 ◽  
pp. 05017
Author(s):  
Khasanov Bakhriddin ◽  
Azimov Azam ◽  
Djurabekov Alisher
Keyword(s):  
Minimum Cost ◽  
Full Scale ◽  
Operational Performance ◽  
Hydraulic Calculation ◽  
Operational Parameters ◽  
Operating Modes ◽  
Pumping Stations ◽  
Pumping Units ◽  
The Cost ◽  
Full Scale Testing

This article is devoted to methods analysis and systems for maintaining the forebay operating modes of pumping stations, which the minimum cost of resources is provided. In modern conditions there is a need to implement measures and solutions to improve the operational performance of pumping stations, which would lead to a decrease in the cost of water supplied. Such activities include the development of methods and systems for the management and maintenance of stations operating modes, which provide the minimum cost of resources. Based on observations, the uneven operation of pumping units over time and as a result of imperfect design of advance cells, the design hydraulic indicators of flow and operational parameters of pumping stations deteriorate. The relevance hydraulic research of forebay regimes and water intakes indicated at a number of meetings on pumps quality. With the development of the recommended set of measures, it is possible to save water and energy resources. The purpose of the work was to conduct full-scale testing of forebay on a large pumping stations in operation, to develop a new design of forebay and its hydraulic calculation. During work performing, energy-hydraulic methods for determining the parameters of pumping units were used.

scholarly journals How electricity is consumed when supplying water to consumers

2021 ◽  
pp. 38-41
Author(s):  
Volodymyr Lyubenko
Keyword(s):  
Power Consumption ◽  
Water Supply ◽  
Distribution System ◽  
Electricity Consumption ◽  
Supply And Distribution ◽  
Pumping Stations ◽  
Main Factors ◽  
Main Component ◽  
Pumping Equipment ◽  
Pumping Units

The article analyzes components that have an impact on electricity consumption in the general water supply and distribution system, in particular those that affect the power consumption of pumping stations of the water supply system.This type of pumping units will only increase, as they are the main component of housing and communal services, which reached us inherited. Currently in housing and communal services, the model of the USSR, pumping equipment is completely worn and requires a replacement. The use of outdated pumps, unsatisfactory state of the water supply network, uneconomically use of water by consumers - are considered as the main factors of electricity loss. The purpose of the article is to attract attention to the problem of excessive use of electricity in the general water supply and distribution system. Possible variations are considered to reduce costs and losses of electricity, namely: rational use of existing landing and networks, introduction of the latest technologies, etc.

Investigation of the reasons for decreased efficiency of depressant additives during the pumping of paraffinic oils

2020 ◽  
Vol 10 (2) ◽  
pp. 157-163
Author(s):  
Alexander Y. Lyapin ◽  
◽  
Vladimir O. Nekuchaev ◽  
Sergei K. Ovchinnikov ◽  
Mikhail M. Mikheev ◽  
...  
Keyword(s):  
Crude Oil ◽  
Rheological Properties ◽  
Laboratory Studies ◽  
Refined Oil ◽  
Oil Pipeline ◽  
Pumping Stations ◽  
Key Factor ◽  
The Usa ◽  
Flow Through ◽  
Paraffinic Oil

The purpose of the research is to find out the reasons for the decrease in the effectiveness of the depressor additive DPN-1 as oil flows through the pipeline. The objects of the research are a mixture of paraffinic oils entering the Usa – Ukhta oil pipeline, either treated or untreated with DPN-1, as well as its mixture with highly-refined oil pumped from the Chikshino crude oil delivery and acceptance point. To achieve this goal, the rheological properties of oil were monitored at the main US oil pumping station, Chikshino and Ukhta-1 oil pumping stations; laboratory studies on the rheological properties attributed to simulated mixtures, compiled taking into account the volumes of oil delivered by various oil producers; and monitoring of the rheological properties of point samples of oils as they flow through the pipeline. The serial experiments resulted in establishing that the key factor in reduced efficiency of the DPN-1 additive used in the paraffinic oil mixture is the high pour point oil pumped from the Chikshino crude oil delivery and acceptance point (the share of which is 10 % of the total pumping volume).

scholarly journals The efficiency of modernization of the on-farm irrigation network based on the principle of self-regulation

2020 ◽  
pp. 119-125
Author(s):  
V. M. Popov ◽  
M. M. Targoniy ◽  
N. V. Soroka
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Water Supply ◽  
Water Distribution ◽  
Irrigation System ◽  
Self Regulation ◽  
Statistical Characteristics ◽  
Irrigation Network ◽  
Pumping Stations ◽  
Construction Of Self

Relevance of research. The research is aimed at substantiating the effectiveness of the principle of self-regulation on closed irrigation systems (CIS) with sprinkling machine (SM) with the use of daily regulation pools (DRP) and "pull" pressure regulators when modernizing them. Aim and objectives of research. The aim of the research is to reduce the energy intensity of water supply for irrigation by increasing pump load rates (PLR) of pumping stations (PS) and expanding the area of ​​irrigation when modernizing and reconstructing closed irrigation networks (CIS). The construction of self-regulating CIS reduces accidental disturbances in the form of discrete changes in volumetric water flow rates generated by pumping units (PU) of PS, which minimizes unproductive discharges of water from distribution canals when performing inter-farm water distribution. Research methods: experimental, mathematical modeling and mathematical statistics. Research results. To substantiate the effectiveness of self-regulation, the results of experimental studies conducted in the operating area of ​​the distribution canal R-1 with machine water supply of Kakhovska Irrigation System, aimed at determining the hydraulic characteristics of existing CIS, energy characteristics of PU of PS. Statistical characteristics of water supply and power consumption processes on CIS equipped with SM from the PS13-R-1, which is equipped with four PU of  250QVD570-50 brand with diameters of rotor wheels Drw = 540 mm and drive motors of 1N435Z-4 brand with a capacity of 400 kW. PS operates on the CIS equipped with SM "Frigate" and drip irrigation system and serves two water users on a total area of ​​1036.0 hectares. To determine the statistical characteristics of the processes of water supply and power consumption, the graphs of pumped water volumes and the graphs of electricity obtained using electricity meters "ORION-01", as well as the graphs of planned water supply, built on daily applications for water use, are used. The logical-mathematical model of operative control of water supply on self-regulating CIS with application of DRP and “pull” pressure regulators is given. The substantiation of the efficiency of water supply management on the modernized CIS from PS13-R-1 was carried out using a mathematical model. Key words: self-regulation, modernization, closed irrigation system, daily regulation pool, statistical characteristics, water supply process, pump unit.   Conclusions: The efficiency of the construction of self-regulating CISs with SMs with the use of daily regulation pools (DRP) and "pull" pressure regulators has been proved. Modernization and reconstruction of CISs on the principles of self-regulation provides: expansion of irrigation areas, reduction of energy consumption in water supply, coordination of water distribution management on open inter-farm and closed in-farm irrigation network, which enables to minimize non-technological water discharges from distribution channels and to prevent wasteful consumption of electricity for its pumping by the main water intake pumping stations.  

Study of the physical, chemical and rheological properties of oil mixtures transported through the Uzen - Atyrau - Samara pipeline

2021 ◽  
pp. 420-427
Author(s):  
Берик Картанбаевич Саяхов ◽  
Александр Геннадьевич Дидух ◽  
Гульнара Амангельдиевна Габсаттарова ◽  
Марат Давлетович Насибулин ◽  
Жасулан Канатович Наурузбеков
Keyword(s):  
Rheological Properties ◽  
Pour Point ◽  
Heating Temperature ◽  
High Viscosity ◽  
Rheological Parameters ◽  
Polarization Microscopy ◽  
Oil Pipeline ◽  
Physical Chemical ◽  
Wide Range ◽  
Oil Mixtures

На начальных участках магистрального нефтепровода Узень - Атырау - Самара формируются партии низкозастывающих бузачинских и высокозастывающих мангышлакских нефтей. По маршруту транспортировки осуществляются дополнительные подкачки нефтей с различными физико-химическими и реологическими характеристиками, что может оказывать существенное влияние на свойства перекачиваемых нефтесмесей. Цель настоящей работы - исследование физико-химических и реологических свойств бузачинской и мангышлакской нефтесмесей на маршруте поставки Узень - Атырау, а также диапазона и причин изменений характеристик бузачинской нефти (основной в компонентном составе нефтесмесей, перекачиваемых по нефтепроводу Узень - Атырау - Самара). По результатам исследований установлено, что свойства мангышлакской нефтесмеси изменяются в незначительных пределах. Для бузачинской нефтесмеси свойственна нестабильность реологических параметров, которые могут изменяться в широком диапазоне в результате путевой подкачки на различных участках нефтепровода. Колебания реологических параметров наиболее показательных проб партий бузачинской нефтесмеси рекомендуется учитывать для решения задач повышения текучести высоковязких нефтей и оптимизации технологических режимов работы трубопроводов, по которым осуществляется перекачка таких нефтей. Методами газохроматографического анализа молекулярно-массового распределения тугоплавких парафинов и поляризационной микроскопии определена температура нагрева бузачинской и мангышлакской нефтесмесей, оптимальная для ввода депрессорной присадки. At the initial sections of the Uzen - Atyrau - Samara main oil pipeline, batches of low pour point Buzachinsky and high pour point Mangyshlak oils are formed. Additional pumping of oils with different physical, chemical and rheological characteristics is carried out along the transportation route, which can have a significant effect on the properties of the pumped oil mixtures. The purpose of this study is to examine the physical, chemical and rheological properties of Buzachi and Mangyshlak oil mixtures on the Uzen - Atyrau supply route, as well as the range and causes of changes in the characteristics of Buzachinsky oil (the main oil mixture in the blend composition pumped through the Uzen - Atyrau - Samara pipeline). According to the research results, it was found that the properties of the Mangyshlak oil mixture vary within insignificant limits. The Buzachinsky oil mixture is characterized by instability of rheological parameters, which can vary in a wide range as a result of route pumping at different pipeline sections. Fluctuations of the rheological parameters of the most indicative samples of batches of the Buzachinsky oil mixture are recommended to be taken into account in order to increase the fluidity of high-viscosity oils and optimize the process modes of operation of pipelines through which such oils are pumped. Using the methods of gas chromatographic analysis of the molecular weight distribution of high-melting-point paraffins, as well as polarization microscopy, the optimal heating temperature for the introduction of a pour point depressant into the Buzachinsky and Mangyshlak oil mixtures has been determined.

Modified equations for hydraulic calculation of thermally insulated oil pipelines for the case of a power-law fluid

2021 ◽  
pp. 388-395
Author(s):  
Марат Замирович Ямилев ◽  
Азат Маратович Масагутов ◽  
Александр Константинович Николаев ◽  
Владимир Викторович Пшенин ◽  
Наталья Алексеевна Зарипова ◽  
...  
Keyword(s):  
Power Law ◽  
Analytical Calculation ◽  
High Viscosity ◽  
Hydraulic Calculation ◽  
Flow Index ◽  
Pipeline System ◽  
Power Law Fluid ◽  
Simplified Approach ◽  
Oil Pipeline ◽  
Oil Pipelines

Теплогидравлический расчет неизотермических трубопроводов является наиболее важным гидравлическим расчетом в рамках решения задач обеспечения надежности и безопасности работы нефтепроводной системы. Для практических расчетов применяются формулы Дарси - Вейсбаха и Лейбензона. При этом в ряде случаев (короткие теплоизолированные участки, поверхностный обогрев нефтепроводов) можно использовать упрощенный подход к расчету, пренебрегая изменением температуры или учитывая температурные поправки. В настоящее время формулы для аналитического расчета движения высоковязких нефтей в форме уравнения Лейбензона получены только для ньютоновской и вязкопластичной жидкостей. Для степенной жидкости соответствующие зависимости отсутствуют, расчет ведется с использованием формулы Дарси - Вейсбаха. Целью настоящей статьи является представление формулы Дарси - Вейсбаха для изотермических течений степенной жидкости в форме уравнения Лейбензона. Данное представление позволит упростить процедуру проведения аналитических выкладок. В результате получены модифицированные уравнения Лейбензона для определения потери напора на участке нефтепровода в диапазоне индекса течения от 0,5 до 1,25. В указанном диапазоне относительное отклонение от результатов расчетов с использованием классических формул Метцнера - Рида и Ирвина не превышает 2 %. The thermal-hydraulic calculation of non-isothermal pipelines is the most important hydraulic calculation in the framework of solving the problems of ensuring the reliability and safety of the oil pipeline system. For practical calculations, the Darcy - Weisbach and Leibenson formulas are used. Moreover, in a number of cases (short heat-insulated sections, surface heating of oil pipelines), a simplified approach to the calculation can be used, neglecting temperature changes or taking into account temperature corrections. At present, formulas for the analytical calculation of the motion of high-viscosity oils in the form of the Leibenson equation have been obtained only for Newtonian and viscoplastic fluids. For a power-law fluid, there are no corresponding dependences; the calculation is carried out using the Darcy - Weisbach formula. The purpose of this article is to present the Darcy - Weisbach formula for isothermal flows of a power-law fluid in the Leibenzon form, which will simplify the procedure for performing analytical calculations. The modified Leibenzon equations are obtained to determine the head loss in the oil pipeline section in the range of the flow index from 0.5 to 1.25. In the specified range, the relative deviation from the results of calculations using the classical Metzner - Reed and Irwin formulas does not exceed 2 %.

scholarly journals To the issue of energy efficiency of using frequency-controlled centrifugal pump units

2018 ◽  
Vol 170 ◽  
pp. 03017 ◽  
Author(s):  
Alexey Dmitriev ◽  
Vyacheslav Gerasimov
Keyword(s):  
Control Systems ◽  
Centrifugal Pump ◽  
Energy Efficient ◽  
Point Of View ◽  
Operating Parameters ◽  
Variable Frequency Drive ◽  
Automatic Control Systems ◽  
Efficient Management ◽  
Pumping Stations ◽  
Pumping Units

The expediency of using a variable frequency drive for pumping units was repeatedly proved both from the point of view of the economic component and the technological one. However, the construction of automatic control systems for the operating parameters of pumping stations is mainly based on maintaining the pressure setpoint and does not include monitoring the efficiency of the aggregates working in the group and, the more so, its regulation. In this paper, an algorithm is developed for the energy efficient management of centrifugal pump units, which allows not only maintaining the pressure setpoint, but also optimizing their efficiency.

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