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Modelling and Measurement of the Gas Flow Rate in Vertical Annular Gas-Water Flow Using a ‘Conductance Multiphase Venturi meter’

Hasan, Abbas and Lucas, Gary (2009) Modelling and Measurement of the Gas Flow Rate in Vertical Annular Gas-Water Flow Using a ‘Conductance Multiphase Venturi meter’. In: What, Where, When: Multi-dimensional Advances for Industrial Process Monitoring International Symposium, Tuesday 23 - Wednesday 24 June 2009, Leeds, UK. (Unpublished)

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    Abstract

    Separated flow in a Venturi meter is highly complex and the application of a homogenous
    flow model could not reasonably be expected to lead to highly accurate results. If this is the
    case, a gas volume fraction measurement technique at the throat must also be introduced
    instead of just relying on the gas volume fraction measurement at the inlet of the Venturi.
    This paper presents an advanced Conductance Multiphase Venturi Meter (CMVM) which is
    capable of measuring the gas volume fractions at the inlet and the throat of the Venturi. A
    new model was investigated to measure the gas flow rate. This model is based on the
    measurement of the gas volume fractions at the inlet and the throat of the Venturi meter using
    a conductance technique rather than relying on the prior knowledge of the mass flow quality x.
    We measure conductance using two ring electrodes flush with the inner surface of the Venturi
    throat and two ring electrodes flush with the inner surface of the Venturi inlet. The basic
    operation of the electrical conductance technique in a multiphase flow is that the conductance
    of the mixture depends on the gas volume fraction in the water. An electronic circuit was
    built and calibrated to give a dc voltage output which is proportional to the conductance of
    the mixture which can then be related to the water film thickness in annular flow (and hence
    to the gas volume fraction). It was inferred from the experimental results that the error of the
    measured gas flow rates was within ± 1.9%.

    Item Type: Conference or Workshop Item (Paper)
    Additional Information: Permission given "as long as it is for internal purpose of the university"
    Subjects: T Technology > TP Chemical technology
    T Technology > TJ Mechanical engineering and machinery
    T Technology > TA Engineering (General). Civil engineering (General)
    Schools: School of Computing and Engineering
    School of Computing and Engineering > High Performance Computing Research Group
    School of Computing and Engineering > Systems Engineering Research Group
    Related URLs:
    Depositing User: Sara Taylor
    Date Deposited: 06 Aug 2009 16:57
    Last Modified: 14 Sep 2011 12:05
    URI: http://eprints.hud.ac.uk/id/eprint/5373

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