Analysis of methods for determining the gas-dynamic energy consumption of gas networks populated points

Abstract

     In recent years, modern software systems, such as the SIMONE software complex, have been widely introduced into the domestic practice of designing and operating gas supply systems for populated points. This makes it necessary and timely to resolve the issue of theoretical provisions and results compliance obtained using the above complex with the calculation base and solutions obtained using the methods provided by domestic regulatory documents. The paper is devoted to solving the problem of low, medium, and high-pressure gas networks made of steel and polyethylene pipes for pumping both natural gas and 20 % of a gas-hydrogen mixture. Through mathematical modeling, the influence of the operating pressure and the movement mode of the transported medium on the value of the gas-dynamic energy consumption of the gas pipeline was determined using two calculation methods. The effect of the pipe material (steel and polyethylene) and the physico-chemical properties of the transported medium (natural gas and gas-hydrogen mixture) on the value of gas-dynamic energy consumption of a gas pipeline using two calculation methods is investigated. The graphical and analytical dependences of the pressure difference at the end of the gas pipeline and the energy parameter difference by the two calculation methods on the Reynolds number are obtained. It is established that the largest difference in gas-dynamic energy consumption (up to 160 % according to the two calculation methods) corresponds to lightly loaded low-pressure gas networks operating in laminar and transient modes of natural gas and gas-hydrogen mixture flow.  In all other cases, an overestimation or underestimation of the value of gas-dynamic energy consumption by up to 5% was detected using PC SIMONE.