«Automation and Informatization of the fuel and energy complex»

The use of the QUICKEST-ULTIMATE method in modeling liquid batches movement in oil and oil product pipelines

UDC: 004.942
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: pipeline network calculation as a graph, mathematical modeling of pipeline transport, numerical diffusion, advection equation, transport equation, QUICKEST-ULTIMATE method

Annotation:

In modern practices of steady-state hydraulic calculations for trunk oil pipelines, assumptions about the rheological parameters constancy of oil batches (density, viscosity) and the thermal profile of the fluid and surrounding soil are widely used. However, analysis of real data has shown that these assumptions can cause significant calculation errors due to the considerably high actual variability of the above-mentioned parameters. It is important to note that numerical calculation of batches parameters in branched pipeline networks is accompanied by the effect of numerical diffusion caused by fluid velocity changes in different pipeline sections. The authors of the article study analyze the existing numerical methods and present experimental investigations of their effectiveness in minimizing numerical diffusion. The experimental results proved the high efficiency of the QUICKEST-ULTIMATE method. An algorithm was developed to represent the pipeline network as a graph as well as calculations of oil density predictions at the network outlet were performed using the proposed method and historical density data at the inlet. The comparison of the obtained predictions with historical density data at the outlet demonstrated the high accuracy of the proposed model.

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