A new contactless impedance sensor for void fraction measurement of gas–liquid two-phase flow

Ji, Haifeng; Chang, Yu‐Cheng; Huang, Zhiyao; Wang, Baoliang; Li, Haiqing

doi:10.1088/0957-0233/27/12/124001

Cited by 24 publications

(19 citation statements)

References 34 publications

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“…For this configuration, the fluid is measured in the axial direction of the pipeline. The sensor with tubular electrodes can obtain a large and stable signal, which helps the improvement of detection performance [ 6 , 9 ]. Through decades of sustained development, C 4 D sensors have been studied by many researchers and are mostly employed for detection in capillary electrophoresis (CE) and microchip electrophoresis (MCE) (the inner diameter of the pipe is always less than 0.5 mm) [ 1 , 2 , 3 , 4 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effects of Electrode Geometry on the Performance of C4D Sensor with Radial Configuration

Huang

Jiang

et al. 2021

Sensors

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Electrodes are basic components of C4D (capacitively coupled contactless conductivity detection) sensors, and different electrode structures (the configuration pattern or the electrode geometry) can lead to different measurement results. In this work, the effects of electrode geometry of radial configuration on the measurement performance of C4D sensors are investigated. Two geometrical parameters, the electrode length and the electrode angle, are considered. A FEM (finite element method) model based on the C4D method is developed. With the FEM model, corresponding simulation results of conductivity measurement with different electrode geometry are obtained. Meanwhile, practical experiments of conductivity measurement are also conducted. According to the simulation results and experimental results, the optimal electrode geometry of the C4D sensor with radial configuration is discussed and proposed. The recommended electrode length is 5–10 times of the pipe inner diameter and the recommended electrode angle is 120–160°.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Effects of Electrode Geometry on the Performance of C4D Sensor with Radial Configuration

Huang

Jiang

et al. 2021

Sensors

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“…Thus, the unfavorable influence of the coupling capacitances C 1 and C 2 on the measurement results can be effectively overcome and the resolution of the CCD sensor can be improved. Meanwhile, our research results also indicate that the simulated inductor technique is an effective way to develop an inductor module . Therefore, the inductor module in this work is a simulated inductor.…”

Section: Experimental Setup and Bubble Growth Characteristics Of Boilmentioning

confidence: 64%

“…Our research works have verified that the series resonance principle is an effective way to improve detection resolution of the CCD sensor . By introducing an inductor module into the detection unit, the capacitive reactance of the coupling capacitances C 1 and C 2 can be eliminated by the inductive reactance of an introduced inductor module.…”

Section: Experimental Setup and Bubble Growth Characteristics Of Boilmentioning

confidence: 69%

“…Therefore, the inductor module in this work is a simulated inductor. The equivalent inductance L eq and the internal resistance R eq of the simulated inductor are

L_{eq} = \frac{R_{1} R_{2} ((), R_{3} + R_{4})}{R_{5}} C_{s}

R_{eq} = \frac{R_{1} R_{2} ((), R_{3} + R_{4})}{R_{5} R_{6}}

…”

Section: Experimental Setup and Bubble Growth Characteristics Of Boilmentioning

confidence: 99%

“…Unfortunately, up to now, CCD technique is mainly applied in the field of analytical chemistry for ion concentration/conductivity detection in capillaries (the inner diameter of capillary is usually less than 0.2 mm) . In the research field of gas–liquid two‐phase flow in mini‐channels, the application of CCD technique is very limited and few researches concerning the online monitoring of boiling process have been published . The scale of mini‐channels is much greater than that of capillaries.…”

Section: Introductionmentioning

confidence: 99%

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A new method for online monitoring of boiling process in mini‐channels

et al. 2019

AIChE Journal

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A new method for online monitoring of boiling process, which is suitable for conductive fluids in mini‐channels, is proposed with the introduction of contactless conductivity detection (CCD) technique and perceptron algorithm (PA) technique. Series resonance principle and simulated inductor technique were adopted to develop a new CCD sensor. PA was used to implement the boiling stage identification, i.e., to identify the current stage was which stage of the boiling process. Three prototypes of the CCD sensors with inner diameters of 1.6, 2.0, and 2.5 mm were developed. With three kinds of conductive fluids (tap water, ethanol–tap water mixture, and KCl solution), boiling experiments were carried out. The experimental results show that the CCD sensor can effectively track the bubble growth of boiling process. The research results also indicate that the proposed method is effective and the identification accuracies are greater than 90.0%. © 2019 American Institute of Chemical Engineers AIChE J, 65: 1365–1375, 2019

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Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

Kubáň

Hauser

2018

Electrophoresis

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The publications concerning capacitively coupled contactless conductivity detection for the 2-year period from mid-2016 to mid-2018 are covered in this update to the earlier reviews of the series. Relatively few reports on fundamental investigations or new designs have appeared in the literature in this time interval, but the development of new applications with the detection method has continued strongly. Most often, contactless conductivity measurements have been employed for the detection of inorganic or small organic ions in conventional capillary electrophoresis, less often in microchip electrophoresis. A number of other uses, such as detection in chromatography or the gauging of bubbles in streams have also been reported.

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A new contactless impedance sensor for void fraction measurement of gas–liquid two-phase flow

Cited by 24 publications

References 34 publications

Investigation of the Effects of Electrode Geometry on the Performance of C4D Sensor with Radial Configuration

Investigation of the Effects of Electrode Geometry on the Performance of C4D Sensor with Radial Configuration

A new method for online monitoring of boiling process in mini‐channels

Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

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