ESTIMATED GAS CONSUMPTION IN GAS DISTRIBUTION NETWORKS

Abstract

The purpose of the work is to improve the method of gas-dynamic calculation of gas distribution networks that supply gas to domestic consumers, when applying a mathematical model of uniform and continuous gas se-lection. Based on the results of theoretical studies using Leibenzon's generalized mathematical model, a refined formula was obtained for the estimated gas flow constant along the length, which ensures the pressure losses that occur during the actual variable flow along the length in low, medium and high pressure gas distribution networks. Analytical expressions were found for the coefficients of the Leibenzone model in the case of applying the Hofer formula for the coefficient of hydraulic resistance in the turbulent regime. The regularities of the influence of the gas flow regime, characterized by the Reynolds criterion, and the ratio of transit and route gas flow rates on the gas pipeline section of all working pressure categories on the degree of refinement of the calculated gas flow rate when applying the refined formula instead of the simplified one have been established. It has been established that the main factor affecting the estimated flow rate of the gas pipeline is the ratio of transit and route gas flow. The degree of clarification of the amount of calculated gas consumption in the case of applying the proposed method in gas dynamic calculations of gas distribution networks of low and medium pressure is estimated. It was established that the maximum refinement of the calculated gas flow rate of 15 % corresponds to dead-end areas for which the transit gas flow rate is zero. For the ratio of transit and road costs greater than one, the difference between calculations based on the simplified and refined formulas decreases to (1-2) %.