Wu Haochi, Duan Quansheng
School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China.
Sensors (Basel). 2019 Jul 19;19(14):3178. doi: 10.3390/s19143178.
The carbon capture and storage (CCS) system has the potential to reduce CO emissions from traditional energy industries. In order to monitor and control the CCS process, it is essential to achieve an accurate measurement of the gas void fraction in a two-phase CO flow in transportation pipelines. This paper presents a novel instrumentation system based on the laser attenuation technique for the gas void fraction measurement of the two-phase CO flow. The system includes an infrared laser source and a photodiode sensor array. Experiments were conducted on the horizontal and vertical test sections. Two Coriolis mass flowmeters are respectively installed on the single-phase pipelines to obtain the reference gas void fraction. The experimental results obtained show that the proposed method is effective. In the horizontal test section, the relative errors of the stratified flow are within ±8.3%, while those of the bubble flow are within ±10.6%. In the vertical test section, the proposed method performs slightly less well, with relative errors under ±12.2%. The obtained results show that the measurement system is capable of providing an accurate measurement of the gas void fraction of the two-phase CO flow and a useful reference for other industrial applications.
碳捕获与封存（CCS）系统有潜力减少传统能源行业的二氧化碳排放。为了监测和控制CCS过程，准确测量输送管道中两相CO流的气体空隙率至关重要。本文提出了一种基于激光衰减技术的新型测量系统，用于测量两相CO流的气体空隙率。该系统包括一个红外激光源和一个光电二极管传感器阵列。在水平和垂直测试段进行了实验。在单相管道上分别安装了两个科里奥利质量流量计，以获取参考气体空隙率。实验结果表明，所提出的方法是有效的。在水平测试段，分层流的相对误差在±8.3%以内，而泡状流的相对误差在±10.6%以内。在垂直测试段，该方法的性能略差，相对误差在±12.2%以内。所得结果表明，该测量系统能够准确测量两相CO流的气体空隙率，并为其他工业应用提供有用的参考。
