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On the effect of the mounting angle on single-path transit-time ultrasonic flow measurement of flare gas: a numerical analysis

  • Ramon Silva MartinsEmail author
  • João Rodrigo Andrade
  • Rogério Ramos
Technical Paper
  • 26 Downloads

Abstract

The oil and gas industry needs accurate flow measurement since it is required by law, and so, considered as a field of legal metrology. Nevertheless, curves and other commonly found obstacles may affect the quality of flow measurements, due to disturbances to the flow, such as swirl and asymmetries in the velocity profile. Single-path ultrasonic flow meters are often used to measure the flow rate in flare gas installations, even though they are sensitive to such disturbances. The present paper uses numerical tools to obtain disturbed flow fields downstream from single- and double-elbow pipe installations, aiming to investigate the effects of the mounting angle on disturbed ultrasonic flow measurements, taking into consideration the contributions of all velocity components. Several transducer mounting angles from 0° to 180° are assessed varying the Reynolds numbers (based on the pipe diameter D) from \(10^{4}\) to \(2 \times 10^{6}\) and axial positions up to 80D downstream from the curve. Results indicate that the correction factors for installation effects are mostly greater than in the guidelines and regulations, which suggests that, in real situations, the flow rate is being underestimated. Moreover, badly located measuring installations may be upgraded just by changing the mounting angle of the ultrasonic transducers.

Keywords

Ultrasonic flow meter Installation effects Flare gas Correction factor Computational fluid dynamics 

Notes

Acknowledgements

RSM is grateful to Dr. Márcio F. Martins for encouraging this publication and for the useful discussions. The authors would like to express their acknowledgement and gratitude to Laboratório de Fenômenos de Transporte Computacional for the use of its computational facilities, as well as to Agência Nacional de Petróleo, Gás Natural e Biocombustíveis, Brazil, for the financial support provided for the research project.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Leahey DM, Preston K, Strosher M (2001) Theoretical and observational assessments of flare efficiencies. J Air Waste Manag Assoc 51(12):1610–1616CrossRefGoogle Scholar
  2. 2.
    Davoudi M, Rahimpour M, Jokar S, Nikbakht F, Abbasfard H (2013) The major sources of gas flaring and air contamination in the natural gas processing plants: a case study. J Nat Gas Sci Eng 13:7–19CrossRefGoogle Scholar
  3. 3.
    Ismail O, Umukoro G (2012) Global impact of gas flaring. Energy Power Eng 4(4):290–302CrossRefGoogle Scholar
  4. 4.
    Emam EA (2015) Gas flaring in industry: an overview. Pet Coal 57(5):532–555Google Scholar
  5. 5.
    Mylvaganam K (1989) High-rangeability ultrasonic gas flowmeter for monitoring flare gas. IEEE Trans Ultrason Ferroelectr Freq Control 36(2):144–149CrossRefGoogle Scholar
  6. 6.
    AGA (2007) Measurement of gas by multipath ultrasonic meters, 2nd edn. Report no. 9, American Gas Association, Washington, DC, USAGoogle Scholar
  7. 7.
    The Norwegian Petroleum Directorate (2001) Regulations relating to measurement of petroleum for fiscal purposes and for calculation of \({CO}_2\)-tax (the measurement regulations)Google Scholar
  8. 8.
    The Energy Resources Conservation Board (2012) ERCB Directive 017-measurement requirements for oil and gas operationsGoogle Scholar
  9. 9.
    Newfoundland and Labrador Offshore Petroleum Board and Nova Scotia Offshore Petroleum Board (2011) Measurement guidelines under the Newfoundland and Labrador and Nova Scotia Offshore Areas—drilling and production regulationsGoogle Scholar
  10. 10.
    ANP/INMETRO (2013) Resolução conjunta ANP/INMETRO No 1, de 10.6.2013—DOU 12.6.2013—Retificada DOU 17.6.2013. Agência Nacional do Petróleo, Gás Natural e Biocombustíveis and Instituto Nacional de Metrologia, Qualidade e Tecnologia, BrazilGoogle Scholar
  11. 11.
    American Petroleum Institute (2007) Manual of petroleum measurement standards—chapter 14: natural gas fluid measurement,1st ednGoogle Scholar
  12. 12.
    Mickan B, Wendt G, Kramer R, Dopheide D (1997) Systematic investigation of flow profiles in pipes and their effects on gas meter behaviour. Measurement 22(1–2):1–14CrossRefGoogle Scholar
  13. 13.
    Carlander C, Delsing J (2000) Installation effects on an ultrasonic flow meter with implications for self diagnostics. Flow Meas Instrum 11(2):109–122CrossRefGoogle Scholar
  14. 14.
    Ruppel C, Peters F (2004) Effects of upstream installations on the reading of an ultrasonic flowmeter. Flow Meas Instrum 15(3):167–177CrossRefGoogle Scholar
  15. 15.
    Salami L (1984) Application of a computer to asymmetric flow measurement in circular pipes. Trans Inst Meas Control 6(4):197–206CrossRefGoogle Scholar
  16. 16.
    Moore PI, Brown GJ, Stimpson BP (2000) Ultrasonic transit-time flowmeters modelled with theoretical velocity profiles: methodology. Meas Sci Technol 11(12):1802CrossRefGoogle Scholar
  17. 17.
    Zheng D, Zhang P, Zhang T, Zhao D (2013) A method based on a novel flow pattern model for the flow adaptability study of ultrasonic flowmeter. Flow Meas Instrum 29:25–31CrossRefGoogle Scholar
  18. 18.
    Yeh T, Mattingly G (1997) Computer simulations of ultrasonic flow meter performance in ideal and non-ideal pipeflows. In: ASME fluids engineering division summer meeting—FEDSM’97, ASMEGoogle Scholar
  19. 19.
    Hilgenstock A, Ernst R (1996) Analysis of installation effects by means of computational fluid dynamics: CFD vs experiments? Flow Meas Instrum 7(3–4):161–171CrossRefGoogle Scholar
  20. 20.
    Holm M, Stang J, Delsing J (1995) Simulation of flow meter calibration factors for various installation effects. Measurement 15(4):235–244CrossRefGoogle Scholar
  21. 21.
    Iooss B, Lhuillier C, Jeanneau H (2002) Numerical simulation of transit-time ultrasonic flowmeters: uncertainties due to flow profile and fluid turbulence. Ultrasonics 40:1009–1015CrossRefGoogle Scholar
  22. 22.
    Gibson J (2009) Installation effects on flare gas ulstrasonic meters: comparing CFD models with experimental data. In: Oil and gas emissions seminarGoogle Scholar
  23. 23.
    Pinton J-F, Brillant G (2005) Sound and vorticity interactions: transmission and scattering. Theor Comput Fluid Dyn 6(18):413–433CrossRefGoogle Scholar
  24. 24.
    ABNT (2010) ABNT NBR 15855:2010 - Medição de gás por medidores do tipo ultra-sônicos multitrajetórias. Norma Brasileira, Associação Brasileira de Normas Técnicas, Rio de Janeiro, BrazilGoogle Scholar
  25. 25.
    Nikuradse J (1932) Laws of turbulent flow in smooth pipes. NASA TT F-10, 359, National Aeronautics and Space Administration, Washington, USA, 1966. Translated from ’Gesetzmässigkeiten der turbulenten Strömung in glatten Rohern’ Forsch. Arb. Ing.-Wes. No. 356Google Scholar
  26. 26.
    Schlichting H (1968) Boundary-layer theory, 6th edn. McGraw-Hill series in mechanical engineering. McGraw-Hill, New YorkzbMATHGoogle Scholar
  27. 27.
    Wang C, Meng T, Ming Hu H (2012) Accuracy of the ultrasonic flow meter used in the hydroturbine intake penstock of the three gorges power station. Flow Meas Instrum 25(Supplement C):32–39CrossRefGoogle Scholar
  28. 28.
    Zheng D, Zhao D, Mei J (2015) Improved numerical integration method for flowrate of ultrasonic flowmeter based on Gauss quadrature for non-ideal flow fields. Flow Meas Instrum 41(Supplement C):28–35CrossRefGoogle Scholar
  29. 29.
    Amri K, Juliastuti Suprijanto, E, Kurniadi D (Aug 2017) Asymmetric flow velocity profile measurement using multipath ultrasonic meter with neural network technique. In: 2017 5th International conference on instrumentation, control, and automation (ICA), pp 146–151Google Scholar
  30. 30.
    Escue A, Cui J (2010) Comparison of turbulence models in simulating swirling pipe flows. Appl Math Model 34(10):2840–2849MathSciNetCrossRefGoogle Scholar
  31. 31.
    Ansys, Inc (2010) ANSYS FLUENT version 13.0: user’s guideGoogle Scholar
  32. 32.
    Yakhot V, Orszag SA, Thangam S, Gatski TB, Speziale CG (1992) Development of turbulence models for shear flows by a double expansion technique. Phys Fluids A Fluid Dyn 4(7):1510–1520MathSciNetCrossRefGoogle Scholar
  33. 33.
    Patankar S, Spalding D (1972) A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows. Int J Heat Mass Transf 15(10):1787–1806CrossRefGoogle Scholar
  34. 34.
    Wendt G, Mickan B, Kramer R, Dopheide D (1996) Systematic investigation of pipe flows and installation effects using laser Doppler anemometry–part I. Profile measurements downstream of several pipe configurations and flow conditioners. Flow Meas Instrum 7(3–4):141–149CrossRefGoogle Scholar
  35. 35.
    Schlüter T, Merzkirch W (1996) PIV measurements of the time-averaged flow velocity downstream of flow conditioners in a pipeline. Flow Meas Instrum 7(3–4):173–179CrossRefGoogle Scholar
  36. 36.
    Xiong W, Kalkühler K, Merzkirch W (2003) Velocity and turbulence measurements downstream of flow conditioners. Flow Meas Instrum 14(6):249–260CrossRefGoogle Scholar
  37. 37.
    AGA (1998) Measurement of gas by multipath ultrasonic meters. Report no. 9, American Gas Association, Arlington, VirginiaGoogle Scholar
  38. 38.
    Martins RS (2012) Numerical simulations of installation effects caused by upstream elbows on single-path transit-time ultrasonic flare flow meters. M.Sc. dissertation, Programa de Pós-Graduação em Engenharia Mecânica, Universidade Federal do Espírito SantoGoogle Scholar
  39. 39.
    Sanderson M, Yeung H (2002) Guidelines for the use of ultrasonic non-invasive metering techniques. Flow Meas Instrum 13:125–142CrossRefGoogle Scholar
  40. 40.
    Yeh T, Espina P, Osella S (2001) An intelligent ultrasonic flow meter for improved flow measurement and flow calibration facility. In: Instrumentation and measurement technology conference, 2001, IMTC 2001. Proceedings of the 18th IEEE, vol 3, pp 1741 – 1746, May 21–23Google Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  • Ramon Silva Martins
    • 1
    • 2
    Email author
  • João Rodrigo Andrade
    • 3
  • Rogério Ramos
    • 4
  1. 1.Department of Mechanical EngineeringUniversidade Vila VelhaVila VelhaBrazil
  2. 2.Department of Mechanical EngineeringInstituto Federal do Espírito SantoVitóriaBrazil
  3. 3.Department of Mechanical Engineering, Fluid Mechanics LaboratoryFederal University of UberlândiaUberlândiaBrazil
  4. 4.Department of Mechanical EngineeringUniversidade Federal do Espírito SantoVitóriaBrazil

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