加氢站关键装备故障分析及识别

Study on fault analysis and identification of key equipment in hydrogenrefueling stations

加氢站作为氢能产业重要的基础设施之一,主要用于为氢燃料电池车安全加氢,同时也是连接产业链上游制氢和下游交通应用的重要枢纽。分析了加氢站关键装备参与的运行工况,结合某加氢站3年故障类型分析,对压缩机、加氢机和管阀在加氢站应用时可能出现的故障进行了分析,发现占比较高的故障是压缩机密封失效、加氢机内部阀门接头泄漏、整站阀门动作异常和管阀漏气。提出在不同工况下采用监测特定的压力降及压力下降率的方法判断氢泄漏情况,建议根据压力下降率确定泄漏严重程度。加氢站关键装备故障分析识别可以帮助加氢站识别初期氢气泄漏,合理安排检查和维修,有效缩短加氢站非计划停机时长,降低加氢站运维成本。

The hydrogen refueling station,as one of the crucial infrastructures in the hydrogen energy industry,is mainly used for safe refueling of hydrogen fuel cell vehicles and serves as a vital hub connecting upstream hydrogen production and downstream applications in the industry chain.This study examines the operating conditions involving key equipment in hydrogen refueling stations.Taking into consideration a three-year failure type analysis of a specific station,this paper delves into the potential failures of high-failure-rate components such as compressors,hydrogen dispensers,and pipe valves.It is found that the most common failures include compressor seal failure,leakage at valve joints inside the hydrogen dispenser,abnormal valve operations of the whole station and gas leaks in pipe valves.It is proposed that monitoring specific pressure drops and the rate of these pressure drops under different working conditions can help identify leaks,and that the severity of leaks can be determined based on the rate of pressure drop.Such an analysis and identification of critical equipment can aid in early hydrogen leak detection,facilitate optimal scheduling of inspections and maintenance,effectively shorten the duration of unplanned downtime,and lower the operational and maintenance costs for hydrogen refueling station.