METHODS OF CALCULATION OF AN OPERATING MODE OF DIFFICULT MAIN GAS PIPELINES

Abstract

The main gas pipelines are the body of the gas transmission system. The main share of expenses of energy resources in the pipeline transport of gas belongs to this part of the system. Characteristics of the pipeline network, also as the set technological tasks, are defining factors for an operating mode of other equipment of system which settles down generally at compressor stations. In this regard, it is very important to provide possibility of calculation of an operating mode of the main gas pipeline with sufficient degree of accuracy. For this purpose you have to consider all significant factors which influence operation of the main gas pipeline. The method of calculation shouldn't contain insoluble difficulties of mathematical character. In spite of the simple construction of the gas pipeline at first sight, it contains difficult processes of movement, friction, interaction with gravitation, internal and external heat exchange. These processes, as a rule, change in time therefore they are non-stationary. The gas transmission system has the difficult scheme where simple gas pipelines are united in a transport network, the operating mode of all elements is interconnected. The specified complexity of processes has rather difficult mathematical description of all these processes by means of the corresponding models, in this regard; obtaining decisions is accompanied by difficulties of mathematical character. Simplification of models for the avoidance of the specified difficulties can reduce their compliance to the described object. The author of this work considers existing methods of calculation of simple gas pipelines, does their analysis. The author classifies models concerning a scope. The author revealed construction stages for all considered universal models. By results of the research the author draws a conclusion about the necessity of the solution of the question of mathematical modeling of gas movement in the main gas pipeline and notes the productive directions of further researches of this subject.