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A. JOHNSON, E. HARMAN, J. BOYD
BLOW-DOWN CALIBRATION OF A LARGE 8 PATH ULTRASONIC FLOW METER UNDER QUASI-STEADY FLOW CONDITIONS

We used an array of critical flow venturis (CFVs) in a blow-down facility to calibrate a large (D = 89.5 cm) 8 path ultrasonic flow meter at atmospheric pressure. The calibration was performed with dry air spanning the flow range 2 kg/s to 36 kg/s. At the largest flows, pressure transients associated with the blow-down system resulted in quasi-steady flow conditions. The quasi-steady conditions were measured using a high speed data acquisition system that scanned 66 instruments (i.e., pressure and temperature sensors) every 1.8 s. Corrections were made for thermal lag of the RTD temperature sensors, and for mass storage effects in the 230.3 m3 connecting volume between the CFV array and the ultrasonic flow meter. The uncertainty of the calibration (with coverage factor k = 2 corresponding to 95 % confidence level) ranged from 0.45 % to 0.58 %.

T. Shimada, R. Doihara, Y. Terao
EVALUATION OF CORIOLIS FLOWMETERS FOR HYDROCARBON VOLUMETRIC FLOW MEASUREMENT

Some types of Coriolis flowmeters has been calibrated using the large and medium hydrocarbon flow calibration facilities at National Metrology Institute of Japan (NMIJ) in order to investigate the effect of the liquid pressure, temperature and properties, which are viscosity and density on volumetric and mass flow rate. Furthermore, the density measurement using the Coriolis flowmeters has been discussed in detail using these calibration results.

A. Svete, J. Kutin, I. Bajsić
DYNAMIC CHARACTERISTICS OF A HYDRAULIC WHEATSTONE BRIDGE MASS FLOWMETER

A hydraulic Wheatstone bridge represents a potential solution for a direct mass flow meter with a linear measuring characteristic. In order to investigate the dynamic performance of the flowmeter, a dynamic physical-mathematical model was built. Since the flowmeter's characteristic is linear, it was found to be unaffected by the square root errors, which is the case with standard differential pressure flowmeters. On the other hand, the flowmeter’s frequency characteristic exhibits a typical resonance. The theoretical results were also confirmed experimentally. Experimental studies of the water flow pulsation effects on the flowmeter were conducted in a test rig with a diaphragm-type flow pulsator.

L. Celenza, M. Dell’Isola, R. D’Alessio, G. Ficco, P. Vigo, A. Viola
METROLOGICAL ANALYSIS OF SMART HEAT METERS

Nowadays heat meters only measure the consumptions of thermal energy and they normally do not allow remote transmission of measurement data for subsequent management purposes. Furthermore, thermal energy measurements are normally performed without evaluating the real “quality” of the supplied thermal energy. On the other hand, the typical features of smart metering could allow to continuously transmit energy data, also interacting with supply and management issues. In this paper, the authors present a brief critical analysis of the main issues of smart metering in thermal energy measurements both in a direct way using heat meters and in an indirect one using heat cost allocators to enhance energy savings of consumers. The first results of some metrological tests aimed to evaluate the influence of common installation effects on commercial direct heat meters are also discussed.

Satoshi Honda
END-SHORTING EFFECT ON ELECTROMAGNETIC FLOWMETERS

This study analyzes an end-shorting effect on electro-magnetic flowmeters with short distance between connecting flanges around about 5 D. The Bevir's formulation is extended to conducting pipe wall. Through the evaluation of the Green function satisfying the corresponding boundary conditions, presice formula is obtained.

Por M. C. Diego Moncada, Ivan Juarez, Cesar Gutierrez, José de Jesús Casillas, Dr. Richard Steven, Kim Lewis, Jennifer Rabone
RESULTS OF TESTING AN ORIFICE METER DIAGNOSTIC SYSTEM AT A MEXICAN GOVERNMENT WATER FLOW FACILITY

In August 2012 CIATEQ tested a new DP meter diagnostic system (called “Prognosis”) on 4”, 0.5 beta ratio, flange tapped orifice meters. These comprehensive tests, at the CIATEQ water flow laboratory at Aguascalientes, Mexico, were the first third party organized liquid flow tests of this technology. CIATEQ considers this DP meter diagnostic system potentially compliant with new Mexican government flow metering regulations. Official authorities were present to witness these tests. In this paper the latest developments of the working principles of the diagnostic system are described. The operators interface with the diagnostics is also described.

Guifu Zhang, Luhai Wang, Yujian Zhu, Jiming Yang, Jun Li, Shuilong Ma
PERFORMANCE OF TURBINE FLOWMETER IN HORIZONTAL OIL-WATER FLOW

The response of turbine flowmeter in horizontal oil-water two-phase flow is experimentally investigated. The flow patterns in pipe as well as the turbine behavior are captured via high speed videography. Varied incoming flow rates up to 30 m3 d-1 are tested. It is found that the turbine response in oil-water flow deflects from that in pure water. The deflection direction and extent depend on respective flow rates rather than flow pattern. Considerable deflection is only observed in stratified flow. In addition, a theoretical modeling of the response of turbine meter in steady stratified flow is realized. Preliminary tests indicate that the established model may predict some important features of meter response in reality.

M. Henry, M. Tombs, F. Zhou, M. Zamora
THREE-PHASE FLOW MEASUREMENT USING CORIOLIS MASS FLOW METERING

This paper describes a new three-phase flow metering technology, combining Coriolis mass flow and water cut readings and without applying any phase separation. The system has undergone formal laboratory trials at NEL, UK and at VNIIR, Kazan, Russia; a number of field trials have taken place in Russia. Results from the NEL trial will be described in detail. Initial experiences from field trials will also be described. Together, these results demonstrate the potential for using Coriolis mass flow metering combined with water cut metering for three-phase (oil/water/gas) measurement.

P. Gajan, Q. Decaudin, J. P. Couput
ANALYSIS OF HIGH PRESSURE TESTS ON WET GAS FLOW METERING WITH A VENTURI METER

This work deals with the flow metering of wet gas issued from high pressure natural reservoirs. Some recent results obtained from tests performed on the CEESI facilities are presented. They are performed at 75 bars with 0.6 beta ratio Venturi meter installed in horizontal pipe configuration. Correction factors obtained are compared to predictions deduced from the flow modelling inside of the meter. These results are analysed in order to explain the agreements or disagreement obtained between the experiments and the flow modelling.

R. Steven, W. Johansen, K. Lewis
CONE DP FLOW METERS – COMMENTS & LESSONS FROM 15 YEARS OF CALIBRATION EXPERIENCE

Cone DP meters are popular generic differential pressure (DP) meters that are used in many industries. There are as yet no cone meter standards documents. Each cone meter is individually calibrated to characterize the meters performance. CEESI has calibrated many cone meters over the last 15 years. This paper shows some massed data sets on cone meter performance and reviews the likelihood of a cone meters performance being predicted without a dedicated calibration. The paper then reviews in detail the calibration data of a large 48”, 0.616 beta ratio cone meter, and introduces a new DP Diagnostics DP meter diagnostic system that was included in the CEESI calibration procedure of this 48” cone meter.

Page 493 of 977 Results 4921 - 4930 of 9762