S. M. Yermishin, A. V. Lopatin, V. A. Dulev, N. A. Khoteev, P. G. Shabanov, A. B. Menshikov, A. V. Startsev
A Virtual Standard® technology-based flow measuring set has been developed for liquid media Virtual Standard® technology is a universal technology for determining and introducing corrections in measuring device readings to reduce their errors. The set consists of a measuring module implemented as Vzliot-PR superimposed ultrasonic flow meter (basic accuracy = 1.3 % to 2 %) and a processing module i.e, digital computing device. The resulting accuracy of the flow measuring set is 0.25 % to 0.5 %.
Dan Hacket, Kevin Chin
Most customers have now started to use ultrasonic meters for natural gas custody transfer metering. As a stand-alone meter, it can give numerous diagnostics information on the performance of the meter, but not enough to determine a benchmark on its performance to a certain reference. This is where external diagnostic would be required to enhance customer's confidence in the overall metering system performance. In this paper, we will focus on these various techniques, and how they are being used. Before we touched on the field verification using SOS on flow computer, we will highlight some of...
Jonathan Berrebi, Jan van Deventer, Jerker Delsing
Installation effects represent a major cause of the metering errors in a flow meter. Ultrasonic flow meters are especially sensitive to installation effects. Installation effects can be static, like those due to pipe bends or diameter reduction at the inlet of the meter, or dynamic like pulsating flows generated by pumps. Recently presented, the detection of pulsating flows has been achieved in stationary flow conditions. In that case, the distribution of the flow rate is not supposed to vary with time. By applying Hinich's harmogram, the detection of pulsating flows is correctly done....
Shang-Yoon Hwang, Ho-June Lee, Heuy-Dong Kim
Multi-path Ultrasonic Flowmeter (MUF) is receiving much attention because it provides a lot of advantages over other techniques of flow rate measurement. It has no moving parts inside flow passage leading to no pressure loss, and it gives a good accuracy and repeatability for flow rate measurement. The present study describes theoretical, experimental, and computational works to investigate the velocity integration method of MUF, which has five acoustic paths. A weighting factor concept, which is given by a function of the chord locations of acoustic paths, is employed to obtain the...
Herman Hofstede, Jankees Hogendoorn, Helen Danen, Ralt Tetzner
Recent technical improvements and developments of multiple beam ultrasonic flowmeters; and its application for pipeline leak detection systems.
Olga Satomi Yoshida, Kazuto Kawakita, Marcos Valverde
Application of ultrasonic flowmeters for fiscal metering has increased in the oil industry. High accuracy, a long-term reliability and no-moving parts are characteristics that define the ultrasonic meter as an attractive option to be considered in custody transfer and fiscal metering operations. The paper presents an analysis carried out on a metering system composed of two similar five beans ultrasonic meters, 24 inches size, maximum capacity of 8 000 m³/h, installed in series in an oil offloading system on board a FPSO. One of the meters operates as the fiscal meter, and the other as a...
Yin Jianzhao, Wang Jianzhong, Yao Jing, Zhu Xiaoguang
The low liquid flow calibration facility is developed together by Beijing Aerospace Propulsion Institute, National Institute of Metrology and Dandong Best Automatic Engineering & Meter Ltd. The facility is designed using static-gravimetric method to calibrate mass flow meters, turbine flow meters and vortex shedding flow meters, from 4 mm to 25 mm in diameter, at flow rates ranging from 8.2 kg/h to 10890 kg/h. It is designed as an integrated movable machinery, to construct a closed system to certificate flow meters. Besides, it can be combined with special test-bed systems to certificate...
Chin Hsia, Cheng-Tsair Yang, Jiunn-Haur Shaw
To calibrate micro flow sensors and as well flow controllers for liquid handling in bio-medicine diagnoses, a traceable system that considers a weighing approach, virtual piston approach, and a velocity-based approach was proposed at CMS. Firstly, a pneumatic push-and-pull pressure control mechanism for steadily driving fluid was verified and estimated of its measurement uncertainty. The capability of the system depends on weighting of the collection bag, the stability of pressure difference, the time interval and the variation of ambient temperature. Due to the low flowrate, weight of...
Sun Guolin, Shen Haijin, Qiao Xingen, Guo Weilin
Along with the increasing of bore of magnetic flowmeter day by day, if the flowrate calibrating device used for large flowrate still adopts the traditional principle of high potential tank, steady head, the disadvantages of high investment, high power consumption etc. will be manifested. To overcome the above mentioned problems, the Shanghai Welltech Automation Co. Ltd. constructed the large water calibrating device which adopted the principle of variable head dynamic volumetric comparison method. This device needs low power consumption and less investment. It can calibrate the water...
Marcos Tadeu Pereira, Valmir Ruiz, Renato Fernandes, Karina Chacur Schraml
A calibration bench was developed and constructed to calibrate domestic water meters, especially for the needs of the water distribution companies. The bench could calibrate up to 6 water meters at the same time in the present version. It was designed to work with water and in normal operation with two reservoirs and a battery of working standards, electromagnetic flowmeters of special grade. The mag meters assure an uncertainty of less than 0,3 %, because they are calibrated on the spot: there is an electronic scale in the circuit of the bench that can be used at any time to calibrate the...