Link for citation: Shestakov R.A., Rezanov K.S., Matveeva Yu.S., Vanchugov I.M. Improved mathematical model of the main pipeline with looping. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2022, vol. 333, no. 2, рр. 123-131. In Rus.

The relevance of the research. In the modern world, pipeline transportation of oil and petroleum products occupies a leading position and it is an important aspect of the industry not only of the Russian Federation, but of the whole world. However, despite all its advantages, there are also significant disadvantages, including those related to the operation of pipeline systems and the accuracy of determining the technological parameters of the pipeline during mathematical modeling in operation and design. In this regard, the development of new and improving the accuracy of existing mathematical models of pipeline systems are urgent tasks of designing and operating pipeline systems, including when designing looping. The main aim of the research is the investigation of the influence of local resistances arising at the points of connection of the looping to the main line of the pipeline on increasing the throughput capacity of the section of the main oil pipeline between two oil pumping stations by laying the looping. Methods: mathematical modeling of the main pipeline section operation taking into account local resistances at the looping connection points and without taking them into account, as well as a comparative analysis of the results obtained by constructing three-dimensional dependencies. Results. A refined mathematical model of the inter-station section of the pipeline with looping, through which oil or petroleum products are pumped, has been developed. The authors have constructed a three-dimensional graph of the dependence of the deviation in calculation results of the looping length of the standard and refined models on the length and diameter of the laid looping. An economic assessment of the additional length of the looping was carried out and three-dimensional dependences of profit on the diameter and length of the looping were constructed, taking into account transshipment operations and without them.