English

Vol. 7 4, 2017 p 94-105

Pages

Article name, authors, abstract and keyword

94-105

Optimization of energy costs in pipeline transportation of hot oils

Iskander K. Beisembetov a, imur . Bekibayev a, Uzak K. Zhapbasbayev a, Erbol S. Makhmotov b, Berik K. Sayahov b

a Kazakh-British Technical University, 59, Tole bi St., Almaty, 050000, Republic of Kazakhstan

b KazTransOil, JSC, 19, Block B, Kabanbai Batyr Ave., Astana, 010000, Republic of Kazakhstan

https://doi.org/10.28999/2541-9595-2017-7-4-94-105

Abstract: Introduction. Digital technology is used for simulation and optimization of oil transfer modes at the pipeline section by integration of software SmartTran and SCADA system.
The task of selection of optimum transfer mode without oil heating is solved by D. T. Jefferson. He defines the optimum transfer mode at the pipeline section for a fixed oil flow, provided that the cost of power energy consumed by all pumps per unit time was minimum.
The task of hot transfer optimization was investigated by V. S. Yablonskiy. The optimization criteria was formulated for a fixed oil flow and is not realized at the change of transfer volume and temperature at the section with several pump stations and heating posts.
Task. It is known that 80 % of the energy consumed during hot transfer is spent on pumps and heater operation. In this paper, unlike other papers, the optimization of the hot transfer is investigated by definition of energysaving conditions of pumps and heater operation. The objective function of optimality at the pipeline section with several stations is determined by the minimum value of the aggregate cost of the energy consumed by the pumps and heaters per unit time.
Solution algorithm. The algorithm of the task solution is built based on a new approach of dynamic programming method. The task of search is divided into a number of overlapping subtasks with definition of optimum substructure. The object of each subtask is the function of the cost of energy consumed by the pumps and heater at oil pipeline section stations. In the process of the solution search a combination of operating pumps and heaters is found which secures the minimum cost of the consumed energy.
Discussion of results. The discussion contains the calculation results for the hot transfer at Kasymovo Bolshoy Chagan section of major pipeline Uzen Atyrau Samara. The algorithm of calculation is implemented on SmartTran software for simulation and optimization of hot transfer. The calculation source data are loaded from SCADA system.
The results of SmartTran software calculation (exponents of oil pressure and temperature, pump capacity, operating costs of transfer, heating and other parameters) of hot transfer conform to the experimental data of SCADA system. Power supply of pumps and heaters operation is found, provided that the oil temperature at the pipeline section doesnt fall below the level required for the safe transfer. The results of optimum mode calculation demonstrate the economical efficiency of the hot transfer.
Hereby, the integration of SmartTran software with SCADA system provides digital technology for optimization of oil hot transfer process modes.

Keywords: digital technology, pipeline transport, optimization criterion, hot transfer

Reference for citing:
Beisembetov I. K., Bekibayev T. T., Zhapbasbayev U. K., Mahmotov E. S., Sayahov B. K. Optimization of energy costs in pipeline transportation of hot oils. Naukatekhnol. truboprov. transp. neftiinefteprod. = Science & Technologies: Oil and Oil Products Pipeline Transportation. 2017;7(4):94105.

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