Justification of measures to improve stability of gas distribution networks

During the operation of gas distribution networks, there have been changes in concentrated loads, gas flow intensity, and the values of the standard pressure in front of the burners of appliances. The internal cross-section of gas pipelines has decreased, and internal stresses have arisen. The current regulatory framework has significantly increased the requirements for gas quality, composition and supply parameters. Currently, gas supply systems are considering the possibility of transporting gas mixtures with the addition of biomethane or hydrogen to natural gas. The physical and chemical characteristics of mixtures of natural gas with hydrogen of various concentrations are being studied. To meet the established regulatory requirements for gas quality, in particular, for the calorific value, the hydrogen concentration in the mixture should not exceed 7%. In this case, the pressure before the burners of gas appliances must be increased by 4%. The efficiency of using household gas appliances, depending on the gas pressure on the burners, was studied. Measures have been proposed to modernize gas supply networks. For example, ensuring optimal pressure in front of any gas device by the nominal pressure specified in the device passport. Recalculation of the system throughput is based on the higher calorific value of gas. It is recommended to ensure optimum pressure by placing gas-reducing devices as close to the consumer as possible and then adjusting the pressure with gas stabilisers. An important aspect is the cost of gas and the environmental impact of its combustion products. To ensure stable operation of the pressure regulator equipment, an alternative way to increase the gas temperature without burning is proposed. The use of the Rank-Hilsh effect is suggested. This will reduce gas consumption and avoid open flames, which will increase operational safety and reduce emissions of pollutants into the atmosphere.