«Equipment and technologies for oil and gas complex»

Assessment of the design throughput capacity of main gas pipelines

UDC: 622.691.4+621.643+621.644
DOI: -

Authors:

¹ Gazprom VNIIGAZ, Saint Peterburg, Russia

Keywords: main gas pipeline, compressor station, throughput capacity, reliability factor, utilization factor, load factor

Annotation:

The authors of the article consider the issues of assessing the coefficient of utilization of main gas pipelines capacity at the preliminary stages of design using new methodological approaches. The main gas pipeline utilization factor is presented as a combination (product) of independent indicators: the operating factor and the reliability factor, reflecting the properties of the annual course of the operational load of a main gas pipeline, compressor station, gas pumping unit and the reliability of a main gas pipeline as a complex technical system. The obtained quantitative assessment of the mode factor is based on the study of the compatibility of annual movements (changes of parameters within the year): design productivity, design throughput, consumed and available drive power, climatic indicators (primarily temperature) and their variability. It is recommended to take the value of the mode factor as constant and equal to 0,97. The analysis and assessment of the reliability factor are performed using a formula that has universality properties and takes into account the reduction in the design throughput capacity during forced and normal shutdowns of the gas pumping unit from operation (parametric failure), the number of gas pumping units and the number of compressor stations in the main gas pipeline and standard reliability indicators (technical utilization factor of the gas pumping unit and utilization factor of the main gas pipeline). A corresponding matrix of the recommended indicators of the main gas pipeline reliability factor is formed depending on the length of the main gas pipeline (number of compressor stations).

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