An Experimental Investigation of Liquid CO2 Release Through a Capillary Tube
An Experimental Investigation of Liquid CO2 Release Through a Capillary Tube
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DOI：
10.1016/j.egypro.2013.06.381
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Han;Jooil Kim;D. Chang
中科院分区：
文献类型：
--
作者：
S. Han;Jooil Kim;D. Chang
本文对排污系统管道内的流动特性进行了实验研究。当发现液态CO2容器可能由于材料或机械缺陷而失去机械完整性时，为了安全起见，应通过所谓的排污过程迅速排出液体存量。在放空过程中，液态CO2在释放到大气中之前经历状态转变为气固两相混合物。泄放速率受相变特性的影响，在代表排污流线的毛细管通道中测量温度和压力，并利用测量数据推断相变的位置。实验结果表明，相变发生之前，CO2流暴露于环境空气中的任何管长度的本研究。
This experimental study was performed to investigate the flow characteristics in the pipe of the blow-down system. When a liquid CO2container is found to lose mechanical integrity, possibly by material or mechanical defects, the liquid inventory should be drained out rapidly for the purpose of safety by the so-called blow-down process. In the course of the blow-down, the liquid CO2experiences the state change into a two-phase mixture of vapor and solid before releasing into atmosphere. The release rate of blow-down is affected by the characteristics of phase change., Temperature and pressure was measured in capillary tube passages representing blow-down flow lines and the location of phase change was inferred with the measured data. The experimental result shows that phase change occurs just before CO2flow is exposed to ambient air for any tube length of this study.