Application of electrical resistance tomography to two-phase pipe flow parameters measurement

Dong, Feng; Jiang, Zhi-Xu; Qiao, Xiaoyu; Xu, Lijun

doi:10.1016/s0955-5986(03)00024-4

Cited by 120 publications

(52 citation statements)

References 12 publications

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“…For example, it is possible to make use of process tomography based MSPC monitoring and contribution plots presented above to correlate mixing behavior with flow regimes such as bubble, slug, multiple bubble, and annular flow regimes. Dong et al 34 had presented interesting attempts to correlate the measurements of voltage pairs with flow regimes. The work MSPC and contribution plots approach presented in this work have potential advantages because it is an unsupervised method, therefore does not need training.…”

Section: Resultsmentioning

confidence: 99%

Making use of process tomography data for multivariate statistical process control

Boonkhao

Wang

et al. 2010

AIChE Journal

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A novel strategy for making effective use of on-line process tomography measurements for process monitoring is described. The electrical resistance tomography (ERT) sensing system equipped with sixteen electrodes provides 104 conductivity measurements every 25 ms. The data has traditionally been used for construction of images for display purpose. In this study, ERT data was used for multivariate statistical process control. Data at predefined normal operational conditions was processed using principal component analysis. The compressed data was used to derive two statistics, T 2 and squared prediction error (SPE). T 2 and SPE charts predict the probability that the process being monitored has undergone statistically significant changes from previous state or the so-called normal operational state, in terms of mixing quality. The methodology is illustrated by reference to a case study of a sunflower oil/water emulsion process.

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Section: Resultsmentioning

confidence: 99%

Making use of process tomography data for multivariate statistical process control

Boonkhao

Wang

et al. 2010

AIChE Journal

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“…The maximum gas void fraction in Jin's study was below 0.25 [4]. The gas void fraction reached 0.64 in Dong's study [5], but the void fraction was estimated based on the polynomial regression of measurement voltage values.…”

Section: Introductionmentioning

confidence: 82%

Evaluation of EIT systems and algorithms for handling full void fraction range in two-phase flow measurement

Jia

Wang

Faraj

2014

Meas. Sci. Technol.

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Abstract:In the aqueous-based two-phase flow, if the void fraction of dispersed phase exceeds 0.25, the conventional Electrical Impedance Tomography (EIT) produces a considerable error due to the linear approximation of Sensitivity Back-projection method, which limits the EIT's wider application in process industry. In this paper, an EIT sensing system which is able to handle full void fraction range in two-phase flow is reported. This EIT system employs a voltage source, conducts true mutual impedance measurement and reconstructs online image with the Modified Sensitivity Back-projection algorithm. The capability of Maxwell relationship to convey full void fraction is investigated. The limitation of linear sensitivity back-projection method is analysed. The modified sensitivity back-projection method is used to derive relative conductivity change in the evaluation. Series of static and dynamic experiments demonstrate the mean void fraction obtained by this EIT system has a good agreement with reference void fractions over the range from 0 to 1, which will significantly extend the applications of EIT in process measurement.

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“…FLOWMETER ERT technology is a non-invasive measurement method [3], [4], [13]. Two-phase or multi-phase flows are its main measurement object.…”

Section: Fusion Of Ert With Electromagnetic (Em)mentioning

confidence: 99%

Fusion Research of Electrical Tomography with Other Sensors for Two-phase Flow Measurement

Deng¹,

Yang²

2012

Measurement Science Review

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The two-phase flow widely exists in the nature and industrial processes. The measurement of two-phase flows, including gas/solids, gas/liquid and liquid/liquid flows, is still challenging. Fusions of electrical tomography with conventional sensors provide possibilities to improve two-phase flow accurate measurement. In this paper, fusions of (1) electrical resistance tomography (ERT) with electromagnetic (EM) flowmeter, (2) electrical capacitance tomography (ECT) with ERT and (3) ECT with electrostatic sensor are introduced. Some research results of fusion methods are presented and discussed. This paper can provide the theoretical support for the multi-sensor fusion for two-phase flow measurement.

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Application of electrical resistance tomography to two-phase pipe flow parameters measurement

Cited by 120 publications

References 12 publications

Making use of process tomography data for multivariate statistical process control

Making use of process tomography data for multivariate statistical process control

Evaluation of EIT systems and algorithms for handling full void fraction range in two-phase flow measurement

Fusion Research of Electrical Tomography with Other Sensors for Two-phase Flow Measurement

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