Wet Gas Flow Metering Based on Differential Pressure and BSS Techniques

Abstract:

Wet gas flow is a typical two-phase flow with low liquid fractions. As differential pressure signal contains rich information of flow parameters in two-phase flow metering, a new method is proposed for wet gas flow metering based on differential pressure (DP) and blind source separation (BSS) techniques. DP signals are from a couple of slotted orifices and the BSS method is based on time-frequency analysis. A good relationship between the liquid flow rate and the characteristic quantity of the separated signal is established, and a differential pressure correlation for slotted orifice is applied to calculate the gas flow rate. The calculation results are good with 90% relative errors less than ±10%. The results also show that BSS is an effective method to extract liquid flow rate from DP signals of wet gas flow, and to analysis different interactions among the total DP readings.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 4922-4927
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.4922
• Online since: November 2011
• Authors: Peng Xia Xu, Yan Feng Geng
• Keywords: Blind Source Separation, Correlation, Differential Pressure, Wet Gas Flow

References

[1] Hao Ding, Zhiyao Huang, Zhihuan Song, and Yong Yan, Hilbert–Huang transform based signal analysis for the characterization of gas–liquid two-phase flow, Flow Measurement and Instrumentation 18, 2007, p.37–46.

DOI: 10.1016/j.flowmeasinst.2006.12.004

[2] Bin Sun, Hongjian Zhang, Lu Cheng, and Yuxiao Zhao, Flow regime identification of gas-liquid two-phase flow based on HHT, Chinese Journal of Chemical Engineering, 2006, 14(1), pp.24-30.

DOI: 10.1016/s1004-9541(06)60033-5

[3] Jun Han, Feng Dong, Mass flow rate measurement of Gas/liquid two-phase flow in horizontal pipe based on V-cone flow meter and adaptive wavelet network, " Instrumentation and Measurement Technology Conference, 2009, I2MTC , 09, IEEE.

DOI: 10.1109/imtc.2009.5168673

[4] Yanbin Xu, Ziqiang Cui, Huaxiang Wang, Feng Dong, Xiaoyan Chen, and Wuqiang Yang, Independent component analysis of interface fluctuation of gas/liquid two-phaseflows-experimental study, Flow Measurement and Instrumentation 20, 2009, pp.220-229.

DOI: 10.1016/j.flowmeasinst.2009.08.002

[5] Qiangwei Li, De-noising of differential pressure signal of two-phase flow based on ICA, Fourth International Conference on Natural Computation.

DOI: 10.1109/icnc.2008.732

[6] Peixing Peng, Baoliang Wang, and Haiqing Li, Voidage measurement of oil-gas two-phase flow on ICA and ES-SVM, Control and Instruments in Chemical Industry, 2007, 34(4), pp.60-62.

DOI: 10.1109/icemi.2007.4351193

[7] Frederic Abrard, Yannick Deville, and Paul White, Form blind source separation to blind source cancellation in the underdetermined case: A new approach based on time-frequency analysis, unpublished.

[8] Frederic Abrard and Yannick Deville, A time-frequency blind signal separation method applicable to underdetermined mixtures of dependent sources, signal Processing 85, 2005, pp.1389-1403.

DOI: 10.1016/j.sigpro.2005.02.010

[9] Xiaozhi Wang, Study on the metering technology of wet gas based on slotted orifice and vortex procession flowmeter, China University of Petroleum Master Degree Thesis, (2010).

[10] Limin He, Liejin Guo, and Xuejun Chen, Measurement of slug velocity and length on horizontal pipeline by means of differential pressure fluctuation analysis, Journal of Chemical Industry and Engineering ( China ), 2003 , 54 ( 2 ), pp.192-198.