Simulation of changes in hydraulic characteristics of pressure pipes depending on temperature

Introduction. Reducing the hydraulic resistance of the inner walls of pressure pipelines made of various materials is an urgent task in the field of pipeline transport, as it allows you to save electricity when transporting liquids. The solution of such problems is possible with the use of physical and mathematical modeling of the operation of pipelines under changing temperature conditions in wide ranges of both the transported medium and the surrounding environment. Physical modeling involves conducting experimental studies of the process of transporting water through pipelines with the identification of the dependence of changes in the hydraulic characteristics of alternative pipe materials on the temperature factor. The goal of modeling hydraulic characteristics depending on temperature is achieved by conducting pilot experiments on a hydraulic stand, as well as using an automated calculation program, where the work of the production system is simulated. Materials and methods. Materials for scientific research are pipes made of polyethylene (PE). The method of research is to conduct experimental and computational and analytical work. Results. The result of the work is presented by a comprehensive analysis of experimental and computational and analytical data on hydraulic and energy calculations for polyethylene pipes, taking into account the temperature conditions of operation of pipeline networks and the transported medium. Conclusions. Mathematical dependences describing the change in pressure losses from the flow rate for the corresponding temperatures of the pipe wall and the transported water are obtained. On the basis of the use of an automated complex, boundary values of ambient temperatures and transported water have been established, allowing for an assessment of electricity consumption.