Modelling and calibration of a ring-shaped electrostatic meter

Jianyong Zhang, Bin Zhou, Chuanlong Xu, Shimin Wang

Research output: Contribution to journalArticle

Abstract

Ring-shaped electrostatic flow meters can provide very useful information on pneumatically transported air-solids mixture. This type of meters are popular in measuring and controlling the pulverized coal flow distribution among conveyors leading to burners in coal-fired power stations, and they have also been used for research purposes, e.g. for the investigation of electrification mechanism of air-solids two-phase flow. In this paper, finite element method (FEM) is employed to analyze the characteristics of ring-shaped electrostatic meters, and a mathematic model has been developed to express the relationship between the meter's voltage output and the motion of charged particles in the sensing volume. The theoretical analysis and the test results using a belt rig demonstrate that the output of the meter depends upon many parameters including the characteristics of conditioning circuitry, the particle velocity vector, the amount and the rate of change of the charge carried by particles, the locations of particles and etc. This paper also introduces a method to optimize the theoretical model via calibration.
Original languageEnglish
Pages (from-to)012001
JournalJournal of Physics: Conference Series
Volume147
DOIs
Publication statusPublished - 1 Feb 2009
Event6th International Symposium on Measurement Techniques for Multiphase Flows - Okinawa, Japan
Duration: 15 Dec 200817 Dec 2008

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