Changes in the pressure

permeability

attenuation and other characteristics of the system occur after hydrogen is incorporated into the natural gas pipeline

which leads to the problem that the economic operation characteristics of the hydrogen-doped natural gas pipeline transportation system are difficult to be characterized by traditional methods.To address the issues above

the operation characteristics of the hydrogen-doped natural gas pipeline transportation system are established by analyzing the effects of hydrogen blending ratio

transportation pressure

ambient temperature

transportation distance and pipeline parameters on the operation characteristics of the system. Firstly

combined with the variation law of physical properties of natural gas under different hydrogen blending ratios

a system operation characteristic model is established from three aspects

namely

pressure loss

pipeline penetration and life attenuation. Then

the operating cost model of the system is established by studying the relationship between the power of the compressor station

the seepage flow and the pipeline life with the hydrogen blending ratio under different boundary conditions. Finally

the cost of transporting hydrogen per unit distance from natural gas pipelines to a unit distance under different hydrogen blending ratios is obtained

respectively. Combined with the data of some natural gas pipelines in the first-line project of West-East Gas Pipeline

the variation law of operating cost of hydrogen-doped natural gas pipeline transportation system under different pipeline flow rates and different hydrogen blending ratios is calculated

and the validity of the model is verified. The study has certain guiding significance for the planning of hydrogen-doped natural gas pipeline transportation system in the future.