Liquid holdup measurement with double helix capacitance sensor in horizontal oil-water two-phase flow pipes

doi:10.1016/j.cjche.2014.10.010

Abstract

Abstract: This paper presents the characteristics of a double helix capacitance sensor formeasurement of the liquid holdup in horizontal oil-water two-phase flow. The finite elementmethod is used to calculate the sensitivity field of the sensor in a pipe with 20 mm inner diameter and the effect of sensor geometry on the distribution of sensitivity field is presented. Then, a horizontal oil-water two-phase flowexperiment is carried out to measure the response of the double helix capacitance sensor, in which a novelmethod is proposed to calibrate the liquid holdup based on three pairs of parallel-wire capacitance probes. The performance of the sensor is analyzed in terms of the flow structures detected by mini-conductance array probes.

Key words: Horizontal oil-water two-phase flow, Liquid holdup measurement, Double helix capacitance sensor, Flow pattern

摘要： This paper presents the characteristics of a double helix capacitance sensor formeasurement of the liquid holdup in horizontal oil-water two-phase flow. The finite elementmethod is used to calculate the sensitivity field of the sensor in a pipe with 20 mm inner diameter and the effect of sensor geometry on the distribution of sensitivity field is presented. Then, a horizontal oil-water two-phase flowexperiment is carried out to measure the response of the double helix capacitance sensor, in which a novelmethod is proposed to calibrate the liquid holdup based on three pairs of parallel-wire capacitance probes. The performance of the sensor is analyzed in terms of the flow structures detected by mini-conductance array probes.

关键词: Horizontal oil-water two-phase flow, Liquid holdup measurement, Double helix capacitance sensor, Flow pattern

Lusheng Zhai, Ningde Jin, Zhongke Gao, Zhenya Wang. Liquid holdup measurement with double helix capacitance sensor in horizontal oil-water two-phase flow pipes[J]. Chin.J.Chem.Eng., 2015, 23(1): 268-275.

Lusheng Zhai, Ningde Jin, Zhongke Gao, Zhenya Wang. Liquid holdup measurement with double helix capacitance sensor in horizontal oil-water two-phase flow pipes[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 268-275.

References

[1] M.W.E. Coney, The theory and application of conductance probes for the measurement of liquid film thickness in two phase flow, J. Phys. E Sci. Instrum. 6 (1973) 903-910.

[2] K. Meftah, A.E. Ruggles, Vapor volume fraction, flow regime, and vapor velocity inference using fluid conductivity measurements, Rev. Sci. Instrum. 69 (1998) 2948-2955.

[3] J.C. Asali, T.J. Hanratty, P. Andreussi, Interfacial drag and film height for vertical annular flow, AIChE J. 31 (1985) 895-902.

[4] P. Andreussi, A.Di. Donfrancesco,M. Messia, An impedance method for the measurement of liquid hold-up in two phase flow, Int. J. Multiphase Flow 14 (1988) 777-785.

[5] G.P. Lucas, I.C. Waltont, Flow rate measurement by kinematic wave detection in vertically upward bubbly two-phase flows, Flow Meas. Instrum. 8 (1997) 133-143.

[6] H.K. Kytömaa, C.E. Brennen, Small amplitude kinematic wave propagation in twocomponent media, Int. J. Multiphase Flow 17 (1991) 13-26.

[7] G. Costigan, P.B.Whalley, Slug flowregime identification fromdynamic void fraction measurements in vertical air-water flows, Int. J. Multiphase Flow 23 (1997) 263-282.

[8] G.P. Lucas, J.C. Cory, R.C. Waterfall, A six-electrode local probe for measuring solids velocity and volume fraction profiles in solids-water flows, Meas. Sci. Technol. 11 (2000) 1498-1509.

[9] M. Fossa, Design and performance of a conductance probe for measuring the liquid fraction in two-phase gas-liquid flows, Flow Meas. Instrum. 9 (1998) 103-109.

[10] F. Devia, M. Fossa, Design and optimization of impedance probes for void fraction measurements, Flow Meas. Instrum. 14 (2003) 139-149.

[11] M.S.A. Abouelwafa, E.J.M. Kendall, The use of capacitance sensors for phase percentage determination in multiphase pipelines, IEEE Trans. Instrum. Meas. 29 (1) (1980) 24-27.

[12] J.J.M. Geraets, J.C. Borst, A capacitance sensor for two-phase void fraction measurement and flow pattern identification, Int. J. Multiphase Flow 14 (1988) 305-320.

[13] E.A. Hammer, J. Tollefsen, K. Olsvik, Capacitance transducers for non-intrusive measurement of water in crude oil, Flow Meas. Instrum. 1 (1) (1989) 51-58.

[14] J. Tollefsen, E.A. Hammer, Capacitance sensor design for reducing errors in phase concentration measurements, Flow Meas. Instrum. 9 (1998) 25-32.

[15] K.J. Elkow, K.S. Rezkallah, Void fraction measurements in gas-liquid flows using capacitance sensors, Meas. Sci. Technol. 7 (8) (1996) 1153-1163.

[16] C.G. Xie, A.L. Stott, A. Plaskowski, M.S. Beck, Design of capacitance electrodes for concentration measurements of two-phase flow, Meas. Sci. Technol. 1 (1) (1990) 65-78.

[17] F. Jin, B.F. Zhang, S. Wang, Optimizing the design of a capacitive transducer for phase-concentration measurements of gas/solid two-phase flows, J. Tsinghua Univ. (Sci Tech) 42 (3) (2002) 380-382.

[18] H. Canière, C. T'Joen, A. Willockx, M.De. Paepe, M. Christians, E. van Rooyen, L. Liebenberg, J.P. Meyer, Horizontal two-phase flow characterization for small diameter tubes with a capacitance sensor, Meas. Sci. Technol. 18 (2007) 2898-2906.

[19] Z. Cao, H.X. Wang, Optimization of capacitive sensors for solid concentration measurement in gas/solid two-phase flow, Chin. J. Sci. Instrum. 28 (2007) 1956-1959 (in Chinese).

[20] W.H. Ahmed, Capacitance sensors for void-fractionmeasurements and flow-pattern identification in air-oil two-phase flow, IEEE Sens. J. 6 (5) (2006) 1153-1163.

[21] C.T. Chiang, Y.C. Huang, A semicylindrical capacitive sensor with interface circuit used for flow rate measurement, IEEE Sens. J. 6 (6) (2006) 1564-1570.

[22] A. Abou-Arkoub, R. Thorn, A. Bousbaine, Online validation of multiphase flowmeters using simple capacitance sensors, IEEE Trans. Instrum. Meas. 59 (10) (2010) 2671-2682.

[23] S.F. Huang, X.G. Zhang, D.Wang, Z.H. Lin,Water holdup measurement in kerosene-water two-phase flows, Meas. Sci. Technol. 18 (12) (2007) 3784-3794.

[24] J.M. Ye, L.H. Peng,W.R.Wang,W.X. Zhou, Optimization of helical capacitance sensor for void fraction measurement of gas-liquid two-phase flow in a small diameter tube, IEEE Sens. J. 11 (10) (2011) 2189-2196.

[25] J.L. Trallero, Oil-Water Flow Patterns in Horizontal Pipes(PhD Dissertation) University of Tulsa, 1995.

[26] J.L. Trallero, C. Sarica, J.P. Brill, A study of oil-water flow patterns in horizontal pipes, SPE Prod. Facil. 12 (1997) 165-172.

[27] J. Lovick, P. Angeli, Experimental studies on the dual continuous flow pattern in oil-water flows, Int. J. Multiphase Flow 30 (2004) 139-157.

[28] S.M. Huang, R.G. Green, A.B. Plaskowski, M.S. Beck, Conductivity effects on capacitance measurements of two-component fluids using the charge transfer method, J. Phys. E Sci. Instrum. 21 (6) (1988) 539-548.

[29] W.Q. Yang, A.L. Stott, M.S. Beck, High frequency and high resolution capacitance measuring circuit for process tomography, IEE Proc. Circuit Dev. Syst. 141 (3) (1994) 215-219.

[30] M. Demori, V. Ferrari, D. Strazza, P. Poesio, A capacitance sensor system for the analysis of two-phase flows of oil and conductive water, Sens. Actuators A 163 (2010) 172-179.

[31] Y.B. Zong, N.D. Jin, Z.Y.Wang, Z.K. Gao, C.Wang, Nonlinear dynamic analysis of large diameter inclined oil-water two phase flow pattern, Int. J. Multiphase Flow 36 (2010) 166-183.

[32] L.S. Zhai, N.D. Jin, Y.B. Zong, Z.Y. Wang, M. Gu, The development of a conductance method for measuring liquid holdup in horizontal oil-water two-phase flows, Meas. Sci. Technol. 23 (2012) 025304.

[33] G.P. Lucas, R. Mishra, Measurement of bubble velocity components in a swirling gas-liquid pipe flow using a local four-sensor conductance probe, Meas. Sci. Technol. 16 (2005) 749-758.

[34] L.S. Zhai, N.D. Jin, Z.K. Gao, X. Huang, The finite element analysis for parallel-wire capacitance probe in small diameter two-phase flow, Chin. J. Chem. Eng. 21 (2013) 60501-X.

[35] D. Strazza, M. Demori, V. Ferrari, P. Poesio, Capacitance sensor for hold-up measurement in high-viscous-oil /conductive-water core-annular flows, Flow Meas. Instrum. 22 (2011) 360-369.

[36] A. Jaworek, A. Krupa, M. Trela, Capacitance sensor for void fraction measurement in water/steam flows, Flow Meas. Instrum. 15 (5-6) (2004) 317-324.