Proceedings

MULTI-PHASE FLOW METERING USING TWIN HELICOIDAL ROTORS - THE ´MULTI-STREAM´ METER

MULTIPHASE FLOW METERING TECHNOLOGY UPDATED

Multiphase flow metering can be understood as the measurement at line conditions of the component volumetric rates of a multiphase flow stream without its compulsory separation or sampling. For oil well test applications, multiphase flow metering is the measurement of the oil, water and gas flow rates of the produced fluids, without the usage either of a two-phase or a three-phase separator. In comparison to conventional gravity-separator well test systems, multiphase flow metering allows shorter-duration, more accurate tests and less operator oversight for well tests. Additionally,...

AB INITIO SIMULATION OF CORIOLIS MASS FLOWMETER

Fluid Structure Interaction (FSI) is the basis of the working principle of Coriolis Mass Flowmeter (CMF). Up to now the description of this coupling has been done using some crude simplifications. Within this weak coupling approximation, the action of the fluid on the structure, the so-called Coriolis force, is easily derived from the structure movement. Clearly the fluid properties effects are out of the reach of this simple model. Nevertheless, CMF are very competetive and are used in many fluid (liquid and gas) flow metering applications. Therefore an "a priori" understanding of their...

THE MEASURE OF FLOW IN LARGE SIZE TURBOPUMPS

This work presents a procedure adopted to measure the flow in an installation with four large sized axial pumps. A twelve captors Pitot type special probe was used for the measurement of flow, specifically developed for this work, as well as, the data acquisition system. The experimental results are shown.

THE USE OF ADCP IN SMALL AND MEDIUM RIVERS

The introduction and operation of a hydrological data net depends on the installation of flow stations net that can generate reliable data obtained from a stage discharge curve, that is produced through a series of flow measurements made in the cross section. Usually, for measurement of those flows, it is used the conventional current meters and other methods. They are well-known and applied plenty methods, however, in the execution they demand time, knowledge and technical abilities, without which can be generated data that are not real. A way to accelerate the process is the use of methods...

TRANSONDAS: A NEW DEVICE TO MEASUREMENT OF FLOW

This work shows the transonda that is a device destined to measure the flow in pipe lines under pressure and in natural or artificial channels. This instrument is being developed in the Hydromechanical Laboratory for Small Hydro Power Plants – LHPCH – of the Engineering Federal School of Itajubá – EFEI – in partnership with Markare Devices Electronics Co. This paper shows the transondas patented models, the results of researches of the preliminary version and the results of the tested prototype in the wind tunnel of the referred laboratory.

ENHANCED INTEGRAL ORIFICE ASSEMBLIES PROVIDE HIGH ACCURATE SMALL LINE MEASUREMENT

By combining integrated electronics with integral orifice technology, these flowmeters are capable of measuring three process variables in one device: DP, static pressure, temperature, and then dynamically compensating mass flow rate. With built in flow computers for dynamic compensation, integrated flowmeters eliminate the errors commonly found in non-dynamic compensated flow measurement. This design eliminates tubing, valves, adapter unions, transmitter mounting, excessive welding and leak points, therefore reducing installation time. Traditional meters measure a single process variable,...

DISCHARGE COEFFICIENTS OF VENTURI TUBES WITH NON-STANDARD CONVERGENT ANGLES

This paper describes six 100 mm Venturi tubes manufactured in a range of diameter ratios from 0.4 to 0.75. They are standard except for the convergent angles which are either 10.5° or 31.5°. They have been calibrated in water and high-pressure air. It is clear that the data in air from the Venturi tubes with a convergent angle of 10.5° are much smoother than those with the standard or the higher convergent angle. Work on the physical basis of the equation for the discharge coefficient at high Reynolds number is described, and using this work an equation for the discharge coefficient in air...

A COMPARISION OF ACCURACY ON ORIFICE METER WITH AND WITHOUT STRAIGHTENER IN THE FIELD

The objective of this study is to improve the metering facilities at metering stations of Korea Gas Corporation (KOGAS), which are being operated in unsatisfying meter run conditions. For experiments, a test facility was constructed to simulate one of the metering stations and it was set up in Jung-dong metering station. Presently, KOGAS has 60 nationwide metering stations and among them, 34 metering stations are located in metropolitan area. Tests were performed with both diameter ratio ( β = d / D ) and flow rate variations and the test range of diameter ratio of orifice flow meter was...

LIQUID FLOW MEASUREMENTS VIA 3-D PIV

A novel approach to flow metering is described based on the particle image velocimetry technique. The flow through a round clear pipe was investigated by isolating a plane normal to the stream direction and obtaining the instantaneous velocity information of tracer particles in the plane. A stereoscopic arrangement was used to obtain all three components of velocity. Integration of the streamwise component over the cross-sectional area of the pipe gave the instantaneous flow rate through the pipe. The benefits and features of this novel approach to flow metering are discussed within the...