Vahit Ciftçi, Başak Akselli, Erdem Ergen, Ferhat Tigrel
This article describes fundamental design, technical aspects, measurement and internal calibration principals of weighing-time flow measurement systems with the diverters for water and Hydrocarbon liquids, which are newly established at UME Fluid Mechanics Laboratories. At the UME Fluid Mechanics Laboratories, there are four weighing-time flow measurement systems with the capacities of 30 tons, 5 tons, 1 tone with dead weight tester and 10 kg for water and three weighing-time flow measurement systems with the capacities of 2.5 tons, 1000 kg with dead weight tester and 150 kg for Hydrocarbon...
Ryouji Doihara, Takashi Shimada, Yoshiya Terao, Masaki Takamoto
A new design for a diverter and weighing tank system has been developed. Experiments have been carried out on a prototype. Diverter wings are set as partitions on a diameter line of a half-cylinder tube. The axis of rotation is at the center of the half cylinder and runs parallel to liquid jets that flow vertically downward from several independent nozzles. This design contributes to small diverter liming error, compact design, small wet area, a simple and robust mechanism, easy implementation of an ISO4185 test, and easy adjustment of diverter trigger timing. After adjustment of start and...
Vahit Çiftçi, Başak Akselli
National Metrology Institute of Turkey, UME, has completed new water flow rate measurement systems. In this article, UME primary and secondary water flow measurement systems will be described briefly. Water flow laboratory was designed for the calibration, testing, and type approval of water flow meters with the flow rates up to 3 000 m3/h and testing of the valves and pumps. There is a 5 m × 20 m × 3 m water reservoir inside the laboratory, filled with soft water. Several stainless-steel pumps with the frequency converters exist in the system. The flow capacities are 20 to 1000 m3/h. Pumps...
Takashi Shimada, Ryouji Doihara, Yoshiya Terao and Masaki Takamoto
The uncertainty of the primary standard for hydrocarbon flow measurements at NMIJ has been evaluated experimentally and analytically in detail. The primary standard is based on the static and gravimetric method with a flying start and finish at flow rates in the range between 3 and 300 m3/h. It consists of two separated test rigs with kerosene and light oil as working liquids. The expanded uncertainty is estimated to be better than 0.03 % for volumetric flow rates and 0.02 % for mass flow rates (coverage factor k = 2). The dominant sources of combined uncertainty of the flow rate are the...
Vahit Çiftçi, Başak Akselli
National Metrology Institute of Turkey, UME, has completed the new oil flow rate measurement systems. In this article, UME primary and secondary oil flow measurement systems will be described briefly. Oil flow laboratory was designed for the calibration, testing, and type approval of liquids other than water. It utilizes flow meters with the flow rates up to 300 m3/h and capable of testing of valves and pumps. There are two 1 m3 and one 4 m3 oil reservoirs in the laboratory for different flow rate measurements with various type of oil. Three stainless steel pumps with the frequency...
Rainer Engel
Establishing a national liquid flow standard that meets the accuracy requirements of modern industry makes necessary the application of up-to-date instrumentation devices in a calibration facility and appropriate test and verification procedures applied on this facility. The participation of PTB's new water flow facility in the international key comparison test of the CIPM; CCM.FF-K1, provided the opportunity to utilize the approved round-robin transfer standards in order to prove the accuracy, repeatability as well as the stability of the essential process parameters during the measurement...
Wang Chi, Li Xu, Duan Hui Ming, Wang Dong Wei, Shi Zhen Dong, Meng Tao
Principle, work procedure, structural features, function, test procedure and analysis of uncertainty for gas piston are introduced, the data compared with PVTt facility are given. According to the specifications, it is found that the establishment of the device is successful and some experiences for further work are accumulated.
Wang Chi, Li Fang, Meng Tao, Xu Yinghua, Yang Youtao, Jiang Ning, Wu Weilong, Sang Xiaoming, Chen Mei, Zhou Bingzhi, Zhang Jinming, Shen Wenxin, Xu Ling
This paper describes the intercomparison tests carried out by 10 labs around China from 2003 to 2004. We compared the bell provers with a flow range from 0. 6 to 6 m³/h by using 2 roots flow meters. Test result and diagram are showed in this paper. We analyzed the influence of temperature control and the seal liquid of bell provers on test.
Meng Tao, Wang Chi
We compared 20 m3 and 2 m3 facilities of pVTt methods gas flow primary prover (pVTt prover) in Flow lab of National Institute of Metrology of China (NIM). We used sonic critical venturi nozzle (sonic nozzle) as transfer standard. The flow points of comparison are about 100 nm3/h and 150 nm3/h. We completed four comparison tests whose results are considered acceptable, whereas we found there was a little systematic error between the two facilities.
Wang Dongwei
This paper introduced gas flow primary standard with pVTt method in NIM which is carrying on technical reformation. After improvement, the primary standard can enhance the ability of measurement and calibration and the reliability of measurement. The reformation can also be as the basis of doing experiment research and unifying the flow value all over the country in future.