The work presents the theoretical and experimental research on a new method, more precise and more advantageous than the ones already known, for the gas flow-meter calibration on air for however high flow-rates or flow velocities and without pressure loss. The research also deals with a patented device, which can be attained under the best technical and economical conditions even for the largest sizes. This is why we have made both the method and the device available for all interested companies and metrological laboratories. The theoretical research refers to the permanent, with axial...
Experimental work has been performed on a selection of small ultrasonic fl ow meters for water. This work was accomplished in order to investigate the infl uence of temperature and fl ow profi le disturbances on the performance of fl ow meters in district heating applications. The fl ow meters tested were all ultrasonic fl ow meters of sing-around typ e. The selection of fl ow meters contains in total seven meters of three different brands. All meters have a flow range from 0.015 m³ / h to 1.5 m³ / h. These meters are commonly used in heat meters in small district heating subscriber...
This paper takes an analytical approach to examine the effects of swirl, asymmetry, pipe roughness, and Reynolds Number on the performance of a meter that utilizes a single bounce path through the center line (e.g., Daniel JuniorSonic) and a meter that employs four chordal paths (e.g., Daniel SeniorSonic). A simple “power law” velocity profile is used to study the effects of pipe roughness and Reynolds Number. Mathematically generated axial velocity profiles, similar to those from bends and Tees, are used to study the effects of asymmetry. A solid body rotation is used to study the effects...
The impact of flow and pressure pulsations on flowmeters of various measuring principles, like turbine, vortex or DP-based flowmeters is well known and published at several occasions. To the author’s knowledge, there have been no publications on investigations regarding the impact of low frequency pulsations on commercially available ultrasonic flowmeters. The influence of high frequency acoustic noise, as caused by control valves, is part of several investigations and reported in recent publications. This paper describes the impact of low frequency, almost sinusoidal pulsations in the range...
Osaka Gas conducted a demonstration test on an ultrasonic flow meter in a high-pressure gas pipeline. In this paper we report on the result of that test.
The presented paper describes a work developed in a 180 000 habitants city in the Northeast of Brazil, that intends to characterize the water consumption profile of typical residential consumers and estimate the volume not measured and billed, due to the inaccuracy of the water meters, function of the age of installation.
Traditionally, data reconciliation has been used to obtain more accurate estimates of plant measurements. The accuracy is assumed to be improved by taking more information into account, ie additional measurements and knowledge of the process. Mass balance reconciliation has been used to get a consistent set of mass flow rates. Plant-wide material balance in oil refineries are providing an accurate representation of the interconnectivity of the entire plant complex and resolving and reconciling data discrepancies associated with plant operating data sources. The process of reconciliation is...
With the recent advances in electronics, the ultrasonic flow measurement technology was the one with the greatest development, allowing a wider use of these flow meters in various applications in the petroleum industry. The measurement of gas and oil at the inlet (import) and outlet (transfer) points, among other internal applications on an oil production platform, is essential for the volume balance and a good control of several properties of the fluid to be transferred. A critical point in this balance is the calculation of the flared gas volume. Ultrasonic technology is able to do it,...
Tests are reported on a 10-unit Rotary Piston Prover system that is installed at the TCC high-pressure gas meter testing facility. The paper also describes new tests that were carried out with the Rotary Piston Prover concerning its temperature dependence. Tests against a Bell Prover are also reported.
This paper addresses uncertainty factors associated with the acoustic flowmeter developed in KRISS. Repeated experimental attempts have been made to investigate their effects on the measurement accuracy of the flowmeter and its robustness in various experimental conditions. The attempts have enabled us to sort out the two major uncertainty factors of the acoustic flowmeter; the measurement errors of the acoustic pressure in the pipe and the acoustic wave reflection characteristics (the ratio of the incident wave to reflected one). Their effects are in details discussed. These findings are...