An energy recovery and hydrogen production potential assessment study was carried out for a pressure reduction station by integrating a turbo expander-electrolyzer system. The hydrogen and electricity production potentials were investigated based on the natural gas flow rate. For this purpose, a turbo expander-proton exchange membrane electrolyzer system was considered, using standard data of an RMS-A type PRS. The variation in energy recovery potential was calculated according to the natural gas flow rate and inlet-outlet parameters such as temperature and pressure. By using these parameters, energy balance calculations and energy profit rate were evaluated. The energy profit rate was calculated as 274 kWh for 50.000 Sm3/h volumetric flow rate. Based on real data for a PRS, the electricity and hydrogen production potential were found to be 13.654.567 kW of electricity and 1.532.325,6 Nm3 of hydrogen production with the annual natural gas flow. According to the sensitivity analysis, increasing the station inlet temperature and outlet pressure negatively affected the energy profit rate, while increasing the inlet pressure had a positive effect. The levelized cost of electricity was calculated as 0,056 $/kW, while the levelized cost of hydrogen was found to be 1,989 $/kgH2. These results indicate that energy recovery from the PRSs is feasible and an opportunity to ensure sustainability.

中文翻译：

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天然气减压站的能量回收和制氢潜力评估


通过集成涡轮膨胀机-电解槽系统，对减压站进行了能量回收和制氢潜力评估研究。根据天然气流量研究了氢气和电力的生产潜力。为此，考虑使用 RMS-A 型 PRS 的标准数据，使用涡轮膨胀机-质子交换膜电解槽系统。根据天然气流量和温度、压力等进出口参数计算能量回收潜力的变化。通过使用这些参数，评估能源平衡计算和能源利润率。对于 50.000 Sm3/h 体积流量，能源利润率计算为 274 kWh。根据 PRS 的真实数据，发现每年天然气流量的电力和氢气生产潜力为 13.654.​​567 kW 电力和 1.532.325,6 Nm3 氢气生产潜力。根据敏感性分析，提高电站入口温度和出口压力对能量利润率产生负向影响，而提高入口压力则产生正向影响。电力的平准成本计算为 0,056 美元/kW，而氢的平准成本为 1,989 美元/kgH2。这些结果表明，从 PRS 中回收能量是可行的，也是确保可持续性的机会。