Yu Gu, Chao Feng, Han Sheng Ye, Zhong Jun Han
Vortex flowmeter is widely used in various applications because it can measure a wide range of media. When the flowmeter fails, the traditional on-site trouble shooting method has the disadvantages of time-consuming and difficult to ascertain the cause due to the complexity of the field conditions.This paper presents a convenient diagnostic method based on the Internet of Things transmission technology, which consists of the hardware, server and website. The hardware is a vortex flowmeter itself, which is to respond to server-side requests and data feedback, the server-side is used for the...
Sheikh Nasiruddin, S N Singh, S V Veeravalli, S Hegde
The effect of Reynolds number and boundary layer thickness on the performance of V-cone flowmeter has been evaluated using computational fluid dynamics (CFD). The shear stress transport k-ω (SST k-ω) turbulence model has been adopted for closure. The performance of two V-cone flowmeters with different beta ratios (β) viz., 0.6 and 0.7 for a fixed vertex angle (φ) of 60° has been analysed as a function of Reynolds number (Re). The results show that the coefficient of discharge (Cd) increases with Reynolds number in the laminar and transition flow regimes whereas it is nearly constant in...
M. de Huu, M. Tschannen, H. Bissig
The Federal Institute of Metrology METAS developed a Hydrogen Field Test Standard (HFTS) that can be used for field verification and calibration of hydrogen refuelling stations. The testing method is based on the gravimetric principle. The experimental design of the HFTS as well as the description of the method are presented here. The HFTS has been tested at METAS with nitrogen gas at -40°C to mimic a refuelling process in the field. Laboratory tests have shown that icing on the pipes of the HFTS have a non-negligible impact on the results. The major uncertainty components have been...
Kazuto Kawakita, Valmir Ruiz, Cezar Augusto Gonçalves, Marcos Teruya, William Escaletti dos Anjos
Calibration of liquid quantity meters may be carried out volumetrically by collecting a known volume of liquid in a standard vessel. In this volumetric method, the standard vessel often known as atmospheric tank prover takes the form of a container with a calibrated volume. In its turn, calibration of the tank prover volume can be carried out by weighing the water contained in the vessel, or carried out using smaller volumetric measures which are themselves traceable to national standards by weighing methods. This paper presents a bilateral interlaboratory comparison in the calibration...
M. Dai, C. Zou, R. Liu, Y. Feng, W. Deng, L.J. Huang
A thermal mass flow meter with micromachined sensing elements is designed and manufactured to address the accurate gas consumption, remote data and connectivity of gas cylinders in particular for medical, food and fuel supply industries. The designed flow meter has a rugged and compact enclosure whereas the flow dynamic range is over 100:1 with the mass flow totalizer capability. Verification of the metrology properties of this design was performed with a precise scale which weighted the gas consumption directly from the weight loss of the cylinder during usage, and compared to the totalized...
L. J. Huang
The thermal mass flow meters based on the calorimetry for utility gas metering have been recently deployed in a few countries and in a fast growth, but several technical issues including the compliance with the existing tariff standards have also been under scrutiny which prevents the desired massive installation. In this paper, we present a new utility gas meter with the thermal time-of-flight sensing technology that can simultaneously measure the mass flow rate, flow velocity, gas pressure, temperature and gas composition variations with the state-of-the-art electronics. These values can...
M. D. Schakel, M. P. van der Beek, Ilko Rahneberg, Jan Schleichert, Tobias Einenkel, Norbert Rogge, Thomas Fröhlich
In 2013 LNG mass flow meters were traceably calibrated by the gravimetric primary LNG mass flow standard with an estimated Calibration and Measurement Capability (CMC) of 0.12% to 0.15%. Dominant uncertainty sources included the uncertainty associated with the correction for so-called parasitic forces. Modifications to the primary standard were made with the objective to reduce the measurement uncertainty associated with the parasitic forces. A Level Compensation System (LCS) was installed to control the level of the weighing vessel during the weighing process. Several experiments were...
M.D. Schakel, O. Kerkhof, M.P. van der Beek, P. van den Herik, R. van Hof, P. Lucas, S. Wulffers
The LNG Mid-Scale Loop (MSL) has been taken into use in 2019. Instead of making use of surrogate fluids, the facility will be able to perform calibrations with cryogenic liquid directly, and under actual operating conditions. Consequently, insight on surrogate-fluid calibration transferability will be obtained. The Cryogenic Research and Calibration facility allows for metrologically traceable cryogenic flow meter calibrations. At the time of writing, calibrations with liquid nitrogen (LiN) can be performed. By performing traceable calibrations with cryogenic liquids directly, market...
Akio Ito, Hiromasa Takiguchi, Aya Morokata, Vince Cisar
We conducted differential pressure (DP) flow meter calibration at CEESI and observed that the combined linearity of VERIS Accelabar® flow primary element and Yokogawa EJX910 multivariable transmitter DP measurement indicated excellent performance. The observation result was that linearity with reference flow rate was 0.5% with 15:1 turndown for the EJX910 H range with the 4” VERIS Accelabar® during the 800 psia air test. EJX910 has also L range and we show that adding L range, flow measurement turndown will be increased beyond 15:1 until 20:1. Firstly we show flow rate equation and...
Chao Chen, Jin Song, Yiping Liu, Jinchuan Wu
Thorium-based molten salt has the characteristics of high temperature, low pressure, high chemical stability and high heat capacity, which can be used as coolant for the molten salt reactor. The hightemperature molten salt flow meters need to measure, display and record the flow parameters in the reactor of molten salt circuit, and monitor the operating conditions of the molten salt reactor equipment, ensuring the safe and reliable operation of the reactor. However, there is no good calibration method for the high-temperature molten salt flow meter in China. We have established...