Pressure response and phase transition in supercritical CO2 releases from a large-scale pipeline
Pressure response and phase transition in supercritical CO2 releases from a large-scale pipeline
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DOI：
10.1016/j.apenergy.2016.06.026
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发表时间：
2016-09
期刊：
影响因子：
11.2
通讯作者：
Xiaolu Guo;Xingqing Yan;Jianliang Yu;Yongchun Zhang;Shaoyun Chen;H. Mahgerefteh;S. Martynov;A. Collard;C. Proust
中科院分区：
文献类型：
--
作者：
Xiaolu Guo;Xingqing Yan;Jianliang Yu;Yongchun Zhang;Shaoyun Chen;H. Mahgerefteh;S. Martynov;A. Collard;C. Proust
长距离二氧化碳管道的连续断裂被认为是灾难性的管道故障，可能导致管道迅速撕裂数百米，并在短时间内释放大量库存。预测意外管道破裂时的库存压力响应和相变对于确定CO2管道的断裂行为至关重要。为了模拟一条实际的CO2管道，开发了一条全长258m、内径233m的大型实验管道，以研究CO2管道排污的流体动力学行为。用高频探头测量破裂后流体压力的演化。在管道的顶部和底部安装热电偶，监测管道内的温度分布。研究了超临界CO2在三种口径(15 mm、50 mm和全口径)管道破裂后的压力响应和相变。研究了不同孔口直径的超临界泄漏过程中压力响应和压力变化率的波形特征，为CO2管道实时监测中确定泄漏位置和泄漏直径大小提供了依据。
Running fractures in long-distance CO2pipelines are considered catastrophic pipeline failures and can result in the rapid tearing of the pipeline for several hundred metres and the release of massive amounts of inventory within a short time. The prediction of inventory pressure response and phase transition in the event of accidental pipeline rupture is of paramount importance to determining fracture behaviour in a CO2pipeline. In order to simulate an actual CO2pipeline, a large-scale experimental pipeline with a total length of 258 m and the inner diameter of 233 mm is developed to study the fluid dynamic behaviour of CO2pipeline blowdown. High frequency transducers were used to measure the evolution of fluid pressure after rupture. Thermocouples on the top and bottom of pipeline were installed to monitor the temperature distributions inside the pipeline. The pressure responses and phase transitions of supercritical CO2were studied following pipeline rupture with three orifice diameters (15 mm, 50 mm and Full Bore Rupture). The waveform characteristics of the pressure response and the pressure change rate were studied in supercritical leakage with different orifice diameters, which could be applied to ascertain the leakage location and the leakage diameter size in the real-time monitoring of CO2pipeline.