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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >ADAPTIVE CALIBRATION OF A CAPACITANCE TOMOGRAPHY FOR IMAGING WATER DROPLETS DISTRIBUTION
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ADAPTIVE CALIBRATION OF A CAPACITANCE TOMOGRAPHY FOR IMAGING WATER DROPLETS DISTRIBUTION

机译：电容层析成像的自适应校准，用于成像水分配

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摘要

A highly-sensitive electrical capacitance tomography (ECT) system based on an HP4284 impedance analyser has been developed and used to quantify low concentration multiphase flows in wet gas separation processes. The system hardware provides high accuracy (0.05%) and high resolution (10~(-17) F). The sensor was calibrated in an environmental chamber with solid samples of known permittivity over ranges of temperature and humidity. Adaptive calibration and adjacent electrode pair correction techniques were applied to image very low concentration profiles. This paper describes the techniques used and presents the experimental results obtained from a test flow rig called Twister, which has been designed to separate liquid droplets from wet gas streams. The test results over a range of operating conditions (20% to 95% humidity) demonstrate that the ECT system is capable of reconstructing clear images of the droplet distribution inside Twister. Changes as small as 1 gWater/kgAir in the droplets form liquid were detectable. It has also shown that the concentration of the condensable phase can be estimated quantitatively within 20% in comparison with the reference measurements.
机译：已经开发了基于HP4284阻抗分析仪的高灵敏度电容层析成像（ECT）系统，该系统用于定量湿气分离过程中的低浓度多相流。系统硬件提供高精度（0.05％）和高分辨率（10〜（-17）F）。传感器在环境室中用在温度和湿度范围内已知介电常数的固体样品进行校准。自适应校准和相邻电极对校正技术已应用于对非常低的浓度分布进行成像。本文介绍了所使用的技术，并介绍了从称为Twister的测试流动装置获得的实验结果，该装置已设计用于从湿气流中分离液滴。在一系列工作条件（湿度20％到95％）上的测试结果表明ECT系统能够重建Twister内部液滴分布的清晰图像。可以检测到液体液滴中的小至1 gWater / kgAir的变化。还显示与参考测量值相比，可冷凝相的浓度可以在20％范围内定量估算。

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