РОЗРАХУНОК ГАЗОВИХ МЕРЕЖНИЗЬКОГО ТИСКУ З УРАХУВАННЯМ ЗОСЕРЕДЖЕНОГО ВІДБОРУ ГАЗУ ПО ДОВЖИНІ ДІЛЯНОК

Abstract

In this paper the analytical calculations were performed demonstrating that normative forecasting methods of gas distribution in the low-pressure gas supply networks, made of steel and polyethylene pipes, do not describe existent gas-dynamic processes correctly. It was proved that the error of gas pressure drop calculations using model of even gas distribution along the pipeline is up to 70 % depending on the pipeline operational parameters. Therefore, a revised method for calculating the design and operating parameters of the pipeline sections was presented
taking into account a model of the concentrated gas extraction along the pipeline. The refined dependencies of pressure drop and gas design flow rate were obtained for the full range of relations between route and transit gas flow in the pipeline sections of the low-pressure gas  networks of localities. The effects of these models on the values of the design and operational parameters of the gas network pipelines were studied by means of computer simulation. The necessity of changing the diameter of some pipeline sections of the gas networks in order to prevent their emergency operation was proved.