Integration of impedance measurements with acoustic measurements for accurate two phase flow metering in case of high water-cut

Application of soft computing techniques to multiphase flow measurement: A review

“…Experimental results suggested that the success rate of the flow pattern identification was higher than 96% and the average errors of the water flowrate and gas flowrate measurements were 7.36%. Meribout et al [46] integrated impedance measurements with ultrasonic measurements to provide the volumetric flowrate of oil-water flow with the water-cut ranging from 0 to 100%. As shown in Fig.15 (a), a pattern recognition algorithm based on an ANN was implemented.…”

“…(a) Measurement system for oil-water two-phase flow measurement (b) Measurement system for oil-air-water three-phase flow measurement Fig.15 Measurement system based on capacitance, conductance, ultrasonic, DP sensors and a Venturi flowmeter [46,47] Wang et al [48] proposed a data fusion method by combining capacitive and electrostatic sensors to realize online volumetric concentration measurement of pulverized coal/biomass fuel flow in co-fired power plants (Fig.16). An adaptive network based fuzzy inference system (ANFIS) was developed through training with gradient descent method and hybrid method by combining the Kalman filter algorithm with a gradient descent algorithm.…”

Gas-Liquid Two-Phase Flow Rate Measurements by Flow Division and Separation Method

“…Therefore, a single phase flowmeter is not capable of measuring the flowrate and phase fraction simultaneously and a combination with other measuring devices is necessary. A lot of combined methods have been developed to measure the two-phase flowrate and phase fraction (Huang et al ,2005;Geng et al ,2007;Meng et al ,2010;Meribout et al ,2010;Oliveira et al ,2009;Reis and Jr ,2008;Sun ,2010;Zhang et al ,2010;Zheng et al ,2008).…”

Ultrasonic method for measuring water holdup of low velocity and high-water-cut oil-water two-phase flow

“…To date, the ultrasonic method has exhibited an outstanding advantage for fl ow parameter measurement in gas-liquid or liquid-solid two-phase flow with large differences in acoustic impedance, whereas its application has been relatively sparse for oil-water twophase fl ow characterized by small differences in acoustic impedance (Meng et al, 2005;Liu et al, 2005;Meng et al, 2006;Meribout et al, 2010;Chaudhuri et al, 2012;Zhai et al, 2013;Chaudhuri et al, 2014). More specifically, in flow conditions of low velocity and a high water cut, the distributions of the sound pressure levels (SPLs) have yet to be determined, due to the changes in oil droplet size and distribution, which leads to differences in ultrasonic scattering and transmission at the oil-water interface.…”