【摘要】 氢气与天然气的物性差异较大，掺氢会对天然气管道工艺参数造成较大影响，因此需系统探究高压条件下不同掺氢比对天然气管道工艺参数的影响规律。基于HYSYS软件模拟了0～30%的掺氢比对天然气管道输送水力工况、节流阀节流效应和离心压缩机运行特性的影响，并对工艺参数的变化进行分析。结果表明：掺氢增大了出站压力和管道输送体积流量，降低了输气功率；压力降相同时，提高起点压力对提高输气功率效果更佳。掺氢会抑制节流产生的焦耳—汤姆逊效应，节流后转变压力和转变温度的变化有助于选择合适的掺氢比。保持转速不变，掺氢可降低离心压缩机性能和管道输气能力。研究结果为天然气管道掺氢后相关工艺参数的确定提供了有效参考。更多还原

【Abstract】 Due to significant difference in physical properties between hydrogen and natural gas, hydrogen blending will have a great impact on the process parameters of natural gas pipeline. This study systematically explores the influence of different hydrogen blending ratios on the process parameters of natural gas pipeline under high-pressure conditions. The effects of 0～30% hydrogen blending ratio on the hydraulic conditions, throttling effect and centrifugal compressor operating characteristics of natural gas pipeline transmission were simulated using HYSYS software. The changes in operating parameters were then discussed and analyzed. The results show that the hydrogen blending increases the outlet pressure and pipeline volume flow rate while reducing the gas transmission power. When the pressure drop remains constant, increasing the initial pressure has a better effect on improving the gas transmission power. The Joule-Thomson effect caused by throttling can be suppressed by hydrogen blending. Studying the change of transition pressure and temperature after throttling helps select an appropriate hydrogen blending ratio. Maintaining constant speed, hydrogen blending decreases the performance of centrifugal compressor, reducing the pipeline gas transmission capacity. The research results provide an effective reference for the determination of relevant process parameters after hydrogen blending in natural gas pipelines.更多还原