The Experts below are selected from a list of 4458 Experts worldwide ranked by ideXlab platform
Yanfeng Geng - One of the best experts on this subject based on the ideXlab platform.
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study on wet gas online flow rate measurement based on dual slotted Orifice Plate
Flow Measurement and Instrumentation, 2009Co-Authors: Jun Wang, Yanfeng GengAbstract:Abstract According to the current technical problems existing in gas and liquid flow measurement for wet gas production, the slotted Orifice-couple flow meter was developed and the basic measurement principles for gas and liquid flow was presented. A new wet gas flow meter was developed based on the dual slotted Orifice transducer. The flow characteristics of liquid flow through dual slotted Orifice Plate, the relationship of differential pressure between the dual slotted Orifice Plate, pressure, temperature, and flow rate of gas/liquid of different aperture ratio were studied. A mathematical measurement model was established to be applied in the flow meter measurement system with dual slotted Orifice Plate. The model was tested and calibrated by on-site field experiments in the China National Center of Metrology at Daqing Oil field. The results showed that the maximum measurement error of the gas and liquid flow was less than 10% and 15% respectively, when the Gas Volume Fraction (GVF) was greater than 90 vol%. The measurement accuracy of this industrial prototype can meet the requirements of well fluids.
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a new type of wet gas online flow meter based on dual slotted Orifice Plate
Seventh International Symposium on Instrumentation and Control Technology: Sensors and Instruments Computer Simulation and Artificial Intelligence, 2008Co-Authors: Yuxing Li, Jun Wang, Lingya Meng, Yanfeng GengAbstract:In view of the current technical problems existing in multiphase flow metering, slotted Orifice-couple flow meter was introduced and the basic principles for measurement were presented. A new wet gas flow meter is developed based on the dual slotted Orifice. The flow characteristic of liquid flowing through dual slotted Orifice Plate, relationship of differential pressure between the dual slotted Orifice Plate, pressure, temperature, and flow rate of gas/liquid of different aperture ratio were studied. The mathematical measurement model applicable to the dual slotted Orifice Plate flow meter measurement system was established. The model was applied to onsite experiment and the calibration of China National Center of Metrology at Daqing Oil field. The results showed that the maximum measurement error of the gas phase flow was less than 10% and that of the liquid phase flow was less than 15%. The measurement accuracy of this industrial prototype can meet requirement of practical production.
C.b. Oland - One of the best experts on this subject based on the ideXlab platform.
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Guide to Orifice Plate Steam Traps
2001Co-Authors: C.b. OlandAbstract:This guide was prepared to serve as a foundation for making informed decisions about when Orifice Plate steam traps should be considered for use in new or existing steam systems. It presents background information about different types of steam traps and defines their unique functional and operational characteristics. The advantages and disadvantages associated with using Orifice Plate steam traps are provided to highlight their capabilities and limitations. Finally, recommendations for using Orifice Plate steam traps are presented, and possible applications are identified.
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Review of Orifice Plate Steam Traps
2000Co-Authors: C.b. OlandAbstract:This guide was prepared to serve as a foundation for making informed decisions about when Orifice Plate steam traps should be considered for use in new or existing steam systems. It presents background information about different types of steam traps and defines their unique functional and operational characteristics. The advantages and disadvantages associated with using Orifice Plate steam traps are provided to highlight their capabilities and limitations. Finally, recommendations for using Orifice Plate steam traps are presented, and possible applications are identified.
Gerald L Morrison - One of the best experts on this subject based on the ideXlab platform.
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characterization of flow homogeneity downstream of a slotted Orifice Plate in a two phase flow using electrical resistance tomography
Flow Measurement and Instrumentation, 2016Co-Authors: Gautham Annamalai, Sahand Pirouzpanah, Sujan R Gudigopuram, Gerald L MorrisonAbstract:Abstract Two-phase flows are complex and unpredictable in nature, commonly encountered in a majority of fluid transport systems. The accurate measurement of two-phase flow is critical for a wide range of applications from wet stream to multiphase flows. There are different methods to meter two-phase flow in various industries. One approach is to produce a flow meter that does not require the individual flow components to be separated and measured separately. This goal can be met if a homogenized mixture is produced which can be measured by a standard single phase flow meter. The slotted Orifice Plate was invented as a flow meter for single phase flows, it is independent upon upstream flow conditions. Slotted Orifice Plate flow meter's utilization in two-phase flow revealed that it is highly capable of working as a flow conditioner transforming most of the multiphase flow regimes into a fairly uniform mixture. This study measures how the relative homogeneity of an air/water mixture varies downstream of the slotted Plate in a horizontal pipe for various upstream conditions including elongated bubble and slug flow regimes using electrical resistance tomography (ERT). According to this study, the optimal location with a maximum homogeneity was determined to be between 1.5 and 2.5 pipe diameters downstream of the slotted Orifice Plate. This indicates that placing a slotted Orifice Plate at the obtained distance upstream of another flow meter such as a venturi coupled with a density measuring device like a radiation based densitometer or an electrical impedance device will help in obtaining accurate multiphase flow rate measurement.
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multiphase flow measurements using coupled slotted Orifice Plate and swirl flow meter
Flow Measurement and Instrumentation, 2014Co-Authors: Sahand Pirouzpanah, Muhammet Cevik, Gerald L MorrisonAbstract:Abstract Multiphase flow metering is a major focus for oil and gas industries. The performance of a modified version of a close coupled slotted Orifice Plate and swirl flow meter for multiphase flow was evaluated to provide further development of a new type of multiphase flow meter. The slotted Orifice provides well homogenized flow for several pipe diameters downstream of the Plate. This characteristic provides a homogeneous mixture at the inlet of the swirl meter for a wide range of gas volume fractions (GVF) and flow rates. In order to evaluate the performance of the designed flow-meter, its response was investigated for varying pressures and water flow rates. The proper correlations were established to provide high accurate two-phase flow measurements. The new proposed approach provides the GVF measurement with less than ±0.63% uncertainty for GVF range from 60% to 95%.
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comparison of Orifice and slotted Plate flowmeters
Flow Measurement and Instrumentation, 1994Co-Authors: Gerald L Morrison, Kenneth R Hall, J C Holste, M L Macek, L M Ihfe, Robert E Deotte, D P TerracinaAbstract:The performance of a standard β = 0.50 Orifice flowmeter is compared to the same flowmeter with a slotted Orifice Plate replacing the standard Orifice Plate. The slotted Orifice Plate has the same total open area as the standard Plate and consists of three concentric rings, each of which contains several radial slots. The flow upstream of both Orifice Plates in preconditioned using a concentric pipe device to produce a wide range of axial velocity profiles without swirl. The discharge coefficient of the standard Plate varies from the base value by −1% to +6%, while that of the slotted Orifice Plate varies by only ±0.25%. When swirl is generated upstream of the Orifice Plates, the discharge coefficients vary by 5% and 2% for the standard and slotted Orifice Plates, respectively. These data indicate that the slotted Orifice flowmeter is superior to the standard Orifice flowmeter in maintaining its calibration over a wide range of inlet flow conditions. The slotted Orifice Plate can be a ‘drop in’ replacement for a standard Orifice Plate.
Cees W M Van Der Geld - One of the best experts on this subject based on the ideXlab platform.
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mass flow rate measurements in gas liquid flows by means of a venturi or Orifice Plate coupled to a void fraction sensor
Experimental Thermal and Fluid Science, 2009Co-Authors: J L G Oliveira, Julio Cesar Passos, Ruud Verschaeren, Cees W M Van Der GeldAbstract:Abstract Two-phase flow measurements were carried out using a resistive void fraction meter coupled to a venturi or Orifice Plate. The measurement system used to estimate the liquid and gas mass flow rates was evaluated using an air–water experimental facility. Experiments included upward vertical and horizontal flow, annular, bubbly, churn and slug patterns, void fraction ranging from 2% to 85%, water flow rate up to 4000 kg/h, air flow rate up to 50 kg/h, and quality up to almost 10%. The fractional root mean square (RMS) deviation of the two-phase mass flow rate in upward vertical flow through a venturi Plate is 6.8% using the correlation of Chisholm (D. Chisholm, Pressure gradients during the flow of incompressible two-phase mixtures through pipes, venturis and Orifice Plates, British Chemical Engineering 12 (9) (1967) 454–457). For the Orifice Plate, the RMS deviation of the vertical flow is 5.5% using the correlation of Zhang et al. (H.J. Zhang, W.T. Yue, Z.Y. Huang, Investigation of oil–air two-phase mass flow rate measurement using venturi and void fraction sensor, Journal of Zhejiang University Science 6A (6) (2005) 601–606). The results show that the flow direction has no significant influence on the meters in relation to the pressure drop in the experimental operation range. Quality and slip ratio analyses were also performed. The results show a mean slip ratio lower than 1.1, when bubbly and slug flow patterns are encountered for mean void fractions lower than 70%.
Dan Franklin - One of the best experts on this subject based on the ideXlab platform.
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characterization of high pressure cavitating flow through a thick Orifice Plate in a pipe of constant cross section
International Journal of Thermal Sciences, 2017Co-Authors: Behrouz Ebrahimi, Guoliang He, Yingjie Tang, Matthew A Franchek, Jay Pickett, Frank Benjamin Springett, Dan FranklinAbstract:Abstract To validate the applicability of basic cavitating flow theory for high-pressure flow systems, this paper presents a systematic study of high-pressure flow through a thick Orifice Plate in a constant cross-section pipe over a wide range of operating conditions. A combined theoretical, numerical and experimental approach was employed to explore the two-phase flow characteristics of both the non-choked and choked flows with a maximum upstream pressure of 5000 psi and a maximum Reynolds number of 2 × 10 6 . For the flow configuration used in this work, a critical downstream-to-upstream pressure ratio of 0.45 was identified below which cavitation and flow choking will occur. Furthermore, it was found from the numerical models that the conventional one-dimensional analysis is inadequate in predicting the discharge coefficient and the condition for the onset of cavitation. Subsequently, new theoretical corrections suitable for high-pressure conditions were proposed, based on the numerical simulation results, and validated by the experimental measurements.