Evaluation of EIT Systems and Algorithms for Handling Full Void Fraction Range in Two-phase Flow Measurement

Jiabin Jia, Mi Wang, Yousef Faraj

Research output: Contribution to journalArticlepeer-review

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 (MSBP) 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 algorithm is used to derive relative conductivity change in the evaluation. Series of static and dynamic experiments demonstrate the mean void fraction obtained using this EIT system has a good agreement with reference void fractions over the range from 0 to 1, which would significantly extend the applications of EIT in process measurement.
Original languageEnglish
Article number015305
JournalMeasurement Science and Technology
Volume26
Issue number1
DOIs
Publication statusPublished - 15 Dec 2014

Keywords

  • Electrical Impedance Tomography
  • Two-phase flow measurement
  • Full void fraction
  • Voltage source EIT

Fingerprint

Dive into the research topics of 'Evaluation of EIT Systems and Algorithms for Handling Full Void Fraction Range in Two-phase Flow Measurement'. Together they form a unique fingerprint.

Cite this