scholarly journals Development of mathematical models and optimization of operation modes of the oil heating station of main oil pipelines under conditions of fuzzy initial information

2021 ◽  
Vol 6 (2 (114)) ◽  
pp. 147-162
Author(s):  
Batyr Orazbayev ◽  
Zhadra Moldasheva ◽  
Kulman Orazbayeva ◽  
Valentina Makhatova ◽  
Lyailya Kurmangaziyeva ◽  
...  
Keyword(s):  
Heuristic Method ◽  
Pipeline System ◽  
Initial Information ◽  
Oil Pipeline ◽  
Operating Modes ◽  
Fuzzy Environment ◽  
Operation Modes ◽  
Heating Station ◽  
Main Oil Pipeline ◽  
Selection Of

The relevance of the study is substantiated by the fact that when managing the processes of oil transportation through main pipelines, it becomes necessary to determine and select the optimal operating modes of the oil pipeline units, taking into account the fuzziness of some part of the initial information. In this regard, solving the problem of multi-criteria selection of effective operating modes for an oil heating station for a hot oil pipeline system, which is often described in a fuzzy environment, based on the apparatus of fuzzy set theories, is an urgent scientific and practical problem. A method for the synthesis of models in the conditions of fuzzy output parameters of the object has been developed, with the help of which fuzzy models of the investigated oil heating station of the main oil pipeline have been built. Based on the modification and combination of various optimality principles, mathematical formulations of the problem of multi-criteria selection of effective operating modes for an oil heating station in a fuzzy environment are obtained. By modifying and adapting the principles of guaranteed results and equality in a fuzzy environment, a heuristic method has been developed for solving the formulated problem of selecting object's operation modes using the initial fuzzy information. The proposed heuristic method for multi-criteria selection in a fuzzy environment is based on the use of the experience and knowledge of the decision-maker. The proposed approach is implemented in the formulation and solution of the problem of multi-criteria selection of operating modes of the oil heating station in Atyrau of the Uzen-Atyrau-Samara main oil pipeline. As a result of the application of the proposed method, an improvement in the degree of fulfillment of a fuzzy restriction on environmental impact was achieved by 2 %, as well as the optimal values of the operating parameters of the object were improved: the temperature was reduced by 1.85 % (5.67 K), pressure – by 0.04 % (kPa) and fuel consumption – by 2.9 % (0.0002 kg/s). The obtained results have confirmed the effectiveness of the proposed approach to solving the assigned tasks.

Using clusterization principles for the selection of repair sections of main oil pipelines based on diagnostic data

2011 ◽  
Vol 8 (1) ◽  
pp. 201-210
Author(s):  
R.M. Bogdanov
Keyword(s):  
Cluster Analysis ◽  
Defect Density ◽  
Density Variation ◽  
Distance Functions ◽  
Oil Pipeline ◽  
Oil Pipelines ◽  
Classification Of Images ◽  
Main Oil Pipeline ◽  
Selection Of

The problem of determining the repair sections of the main oil pipeline is solved, basing on the classification of images using distance functions and the clustering principle, The criteria characterizing the cluster are determined by certain given values, based on a comparison with which the defect is assigned to a given cluster, procedures for the redistribution of defects in cluster zones are provided, and the cluster zones parameters are being changed. Calculations are demonstrating the range of defect density variation depending on pipeline sections and the universal capabilities of linear objects configuration with arbitrary density, provided by cluster analysis.

scholarly journals Methods of constructing models and optimizing the operating modes of a chemical engineering system for the production of benzene in a fuzzy environment

2021 ◽  
Vol 2 (2 (110)) ◽  
pp. 78-88
Author(s):  
Batyr Orazbayev ◽  
Kulman Orazbayeva ◽  
Valentina Makhatova ◽  
Raigul Tuleuova ◽  
Zhumazhan Kulmagambetova ◽  
...  
Keyword(s):  
Chemical Engineering ◽  
System Analysis ◽  
Optimization Problems ◽  
Engineering System ◽  
Engineering Systems ◽  
System Operation ◽  
Operating Modes ◽  
Fuzzy Environment ◽  
Operation Modes ◽  
Chemical Engineering Systems

The study object: the chemical engineering system for production of benzene and optimization of the system operation modes based on modeling. An approach to the effective solution of problems of optimization of operating modes of real chemical engineering systems was proposed. Since such systems are usually multicriterial and characterized by the fuzziness of initial information, an approach to the development of their models and optimization of their operating modes in a fuzzy environment was proposed. The essence of this approach lies in the construction of mathematical models and optimization of system operation modes based on the system analysis methodology using available information of deterministic, statistical, and fuzzy nature. Statements of the problems of optimization by means of chemical engineering systems in a fuzzy environment have been obtained by modifying various principles of optimality for working in a fuzzy environment. Based on a modification of the principles of maximin and Pareto optimality, a heuristic algorithm for solving the formulated optimization problem was proposed based on the use of knowledge and experience of decision-makers. The proposed method of model construction and an optimization algorithm were implemented in practice when constructing models of benzene and rectification columns of a chemical engineering system of production of benzene when formulating and solving the problem of optimizing their operation modes in a fuzzy environment. Analysis and comparison of optimization results allow us to conclude about the effectiveness of the proposed fuzzy approach to solving optimization problems in a fuzzy environment. As a result of optimization of the benzene production process, the benzene yield increased by 1.45 thousand t or by 1.1 %, the raffinate output volume increased by 0.4 thousand t in conditions of upholding constraints on benzene quality. The proposed approach makes it possible to assess the degree of upholding of fuzzy constraints

Glavtransneft fixed assets: tanks

2020 ◽  
Vol 10 (5) ◽  
pp. 490-498
Author(s):  
Anatoly E. Soshchenko ◽  
◽  
Elena V. Shchurova ◽  
Boris N. Mastobaev ◽  
◽  
...  
Keyword(s):  
Pipeline System ◽  
Oil Pipeline ◽  
Tank Farm ◽  
Oil Transportation ◽  
Fixed Assets ◽  
Different Types ◽  
The Usa ◽  
Main Production ◽  
Main Oil Pipeline

The article presents a historical overview of one of the most important groups of fixed assets of the Main Production Office for Oil Transportation and Supply (Glavtransneft) – tanks. The main tendencies of tank construction development in the USSR and the USA in 1970–1990 are presented. The analysis of technical indicators and parameters of tank designs in our country and abroad was performed. The issues of ensuring reliable and safe operation of tanks of different types, as well as the directions of technological change in the field of long-term growth of the tank farm in the main oil pipeline system are considered.

scholarly journals PROBLEM OF DECISION-MAKING ON CONTROL OF THE PROCESS OF HYDRAULIC TREATMENT OF A CATALYTIC REFORMING PLANT IN A FUZZY MEDIUM AND DEVELOPMENT OF A METHOD FOR ITS SOLUTION

2021 ◽  
Vol 82 (4) ◽  
pp. 158-167
Author(s):  
B. Orazbaev ◽  
◽  
A. Zhumadillayeva ◽  
A. Tanirbergenova ◽  
K. Orazbayeva ◽  
...  
Keyword(s):  
Decision Making ◽  
Mathematical Formulation ◽  
Heuristic Method ◽  
Operating Mode ◽  
Catalytic Reforming ◽  
Initial Information ◽  
Fuzzy Environment ◽  
Manufactured Products ◽  
Decision Making Problem ◽  
Made In

The problems of formulating and solving the problem of making decisions on the control of the hydrotreating process in a fuzzy environment are investigated and an effective method for solving such problems with the involvement of experts, their experience, knowledge and intuition is proposed. The statement of the problem of controlling the hydrotreating process, which takes place in the hydrotreating reactor and is characterized by the indistinctness of the initial information, is obtained in the form of the problem of making decisions on the choice of the optimal operating mode of the hydrotreating reactor. The management criteria were chosen to maximize the volume of production, i.e. hydrogenate, and improving the quality characteristics of the manufactured products. In the mathematical formulation of the decision-making problem for the management of the hydrotreating process in a fuzzy environment and the development of a method for its solution, the ideas of the principle of the main criterion and maximin were used by adapting them to work in a fuzzy environment. A heuristic method has been developed for solving the assigned decision-making tasks for controlling the hydrotreating process in a fuzzy environment. The originality and novelty of the applied approach to the formulation and solution of the decision-making problem in a fuzzy environment consists in increasing the adequacy of the decision made in a fuzzy environment due to the maximum use of the initial fuzzy information.

Optimization of operating modes of the main oil pipeline according to the criterion of minimum costs for electric energy payment

2021 ◽  
pp. 190-197
Author(s):  
Михаил Владимирович Лурье ◽  
Екатерина Олеговна Штанько
Keyword(s):  
Optimality Criterion ◽  
Electric Energy ◽  
Electrical Energy ◽  
Optimal Operating ◽  
Oil Pipeline ◽  
Operating Modes ◽  
Operating Schedule ◽  
The Cost ◽  
Main Oil Pipeline ◽  
Minimum Costs

Рассматривается вопрос о выборе оптимального плана эксплуатации технологического участка магистрального нефтепровода при различных производительностях. В качестве критерия оптимальности принимается минимум суммарных денежных затрат на оплату потребляемой электрической энергии. При изменении планов поставок нефти приходится решать вопрос, является ли новый вводимый режим оптимальным, какова будет величина требуемой дополнительной или неизрасходованной электроэнергии, какие поправки требуется вносить в заявку на электроэнергию. В этой связи определение корректного способа вычисления и сравнения энергопотребления при планировании режимов работы магистрального нефтепровода для разных, изменяющихся планов перекачки является актуальной и важной задачей. Предлагается двухэтапный алгоритм определения оптимального графика работы технологического участка нефтепровода путем решения задачи линейного программирования, сформулированной таким образом, чтобы учесть все особенности расчета стоимости потребленной электрической энергии. Приводится пример расчета с использованием предлагаемого алгоритма. The article considers the issue of choosing the optimal operating schedule for the technological section of the main oil pipeline at various pumping capacities. The optimality criterion is the minimum of total monetary expenses for payment of electric energy consumed for the oil pumping process. It is necessary to decide whether the new regime being introduced is optimal, what amount of additional or unspent electricity will be required, and how much it is needful to adjust the electricity demand when changing oil-pumping plans. In this regard, determining how to correctly calculate and compare energy consumption when planning the operation modes of the main oil pipeline for different, changing pumping plans is an urgent and important task. A two-stage algorithm for determining the optimal operating schedule of the oil pipeline technological section is proposed. The proposed method consists in solving a linear programming problem formulated in a way that takes into account all features of calculating the cost of consumed electrical energy. An illustrative example of calculation using the proposed algorithm is given.

Application of Fuzzy Analytic Hierarchy Process in Selection of Electrical Heat Tracing Elements in Oil Pipelines

2013 ◽  
Vol 367 ◽  
pp. 452-456 ◽  
Author(s):  
Xiao Gang Zhao ◽  
Yi Zhou ◽  
Jian Yu Zhao
Keyword(s):  
Analytic Hierarchy Process ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Analytic Hierarchy Process ◽  
Pipeline System ◽  
Analytic Hierarchy ◽  
C Language ◽  
Oil Pipeline ◽  
Hierarchy Process ◽  
Selection Of

The Fuzzy Analytic Hierarchy Process (FAHP), based on the combination of Fuzzy Comprehensive Evaluation and AHP, is introduced in this paper and C# language is proposed to program its mathematical model. Moreover, such program is applied in the actual selection of the electrical heat tracing elements in oil pipeline system. The application shows that it is scientific, reliable, accurate, simple and rapid, which makes it suitable for other evaluations.

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