Theoretical Analysis of the Natural Separation of Hydrogen and Natural Gas in the Pipelines of an Apartment Building

Abstract— Due to the current development of the state of fossil resources, efforts are being made to replace extractable energy sources with renewable sources that would have less impact on the environment during the production, transport and consumption processes. Hydrogen is a promising universal energy carrier that could gradually replace the currently used fossil fuels to a large extent. The article discusses the problem of mixing hydrogen into natural gas using simulation in the ANSYS CFX program into the proposed distribution network, as well as its behaviour in a mixture with natural gas in the case of reduced consumption by the consumer, or during downtime or repairs, when the flow in the intake pipe is reduced or completely stopped.