Exploration of the application of hydrogen-doped natural gas in low-pressure gas transmission and distribution networks

Abstract

At the moment, most hydrogen-doped natural gas pipeline transmission research is concentrated on long-distance pipeline systems, with little research on low-pressure gas transmission and distribution networks. In this article, we look at the impact of hydrogen doping on the network's gas interchangeability. Using SPS software, we simulate and investigate the effect of hydrogen addition on the hydraulic properties of the pipe network. Finally, the compatibility of the low-pressure pipe network was investigated. The outcomes of the study reveal that when the hydrogen doping ratio is less than 19 percent, gas interchangeability can be achieved for the area's low-pressure gas pipeline network. If the heat flow rate of each end-user is managed and the hydrogen doping ratio is less than 20%, the network's pressure drop criterion can be met. Due to the low pressure of the city gas distribution network, hydrogen damage caused by hydrogen doping is usually not a concern under normal operating conditions. However, the pipe accessories’ sealing performance must be considered. This study could have implications for calculating hydrogen doping ratios in other gas pipeline systems.