Xiaobin Huang, Liang Zhang, Chun Lu
Small gas flow measurement is widely applied in aerospace, environmental monitoring, automotive, medical and other fields. To calibrate the small gas flow, a portable transfer standard device based on laminar flow technology is developed, which includes a gas conditioner, laminar flow elements, a pressure sensor, a temperature sensor and a flow computer. The measurement range of the device is (1 ~ 10000) mL/min with a relative expanded uncertainty of U ≤ 0.3 %, k = 2. The device has the capacity to compensate the medium temperature influencing on the flow rate. It can be utilized to...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.137
· Download
Elsa Batista, Vania Silverio, Florestan Ogheard, Christina Pecnik, Holger Becker, Anders Niemann
This paper presents the objectives and initial outcomes of EMPIR Project 20NRM02 MFMET - Establishing metrology standards in microfluidic devices, funded under the EURAMET EMPIR program of the European Commission, that intends to tackle the lack of metrological specifications for microfluidics. It started in June 2021 with the involvement of 15 partners and will have a duration of three years. The main goal of this project is to contribute to the development of globally accepted standards for microfluidics, with a focus in metrology for the methodologies and fabrication processes that are...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.136
· Download
H. Bissig, M. de Huu
Calibration of flow devices is important in several areas of pharmaceutical, flow chemistry, HPLC and microfluidic applications, where dosage of process liquids or accurate measurement of the flow rate are important. The process-oriented liquid itself might influence the performance of the flow device. Therefore, the calibration of the flow meter or microfluidic device with the process-oriented liquid is important and performing dynamic flow profile changes to simulate any dosing process gives important insight in the behaviour of these flow devices and their accuracies under non-constant...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.135
· Download
Hai-Bo Zhao, Han Wu
The infusion system (referred to pump) was the heart of High performance liquid chromatography (HPLC), which provided the power of HPLC. The critical parameter of the pump were the accuracy and stability of flow, which were directly related to the consistency and effectiveness of HPLC results. At present, the technical standards of HPLC are mainly JJG705-2014 and EDQM-OMCL, which were that Verification Regulation of Liquid Chromatograph and Quality Control Laboratory of European Medical Administration for flow of HPLC respective. In this study, a new portable HPLC flowmeter (PM-210plus) for...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.134
· Download
L. Liu, C. Zhou, T. Meng
Liquid micro-flow facility in our country can achieve ultralow flow measurement as low as 100nL/min. In the detection process of liquid micro-flow facility, evaporation is significant for liquid at low flow rate, and if not controlled, the evaporation of the medium will be the main source of uncertainty for liquid micro-flow facility, so it is necessary to correct the evaporation effect during the test. Evaporation occurs mainly during the collection of liquid in the weighing container inside the balance, the effect of evaporation on flow is analysed, and obtains an evaluation method of the...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.133
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Lianghua Mao, Chao Li
With the development of Metrology, the new definition of SI is based on quantum physics, and will lead metrology into a new era of quantum metrology. There are many problems in current metrology mode, and it is urgent to find a remote metrology mode. The remote measurement will be better integrated with advanced technologies such as Big Data and The Internet of Things.It can be easier to analyze the causes of problems, which is conducive to energy conservation and emission reduction.The paper explores the application of remote metrology in the field of natural gas metering. First it analyzes...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.132
· Download
Yinjie Zhuo, Chengxu Tu, Xiang Li, Haohao Xu, Jiaxiang Wang, Weijie Chen, Qingsong Shi, Yexin Lu, Di Xiao, Fubing Bao
As an important link in the industry chain of hydrogen energy, liquid hydrogen has great potential in civil aviation, shipping, and urban public transportation, and is a also key component in the future large-scaleindustrialization of hydrogen energy. The accuracy of liquid hydrogen flow measurement is crucial in its preparation, storage, transportation, application, and trade settlement during the whole industry chain running. The liquid hydrogen flow standard device is the core equipment to check and calibrate the liquid hydrogen flowmeter, which is the key link to ensure the reliable flow...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.131
· Download
C. Z. Lü, W. L. Li, M. N. Li, C. H. Li, D. L. Xie
Ultrasonic flowmeters are the most commonly used instruments in natural gas trade, the in-use inspection methods can be used to verify the performance of it. The supervised learning algorithm with the digital measurement technology is utilized to investigate the method in-use of the ultrasonic flowmeter. Random Forest and BP-Artificial Neural Network are used to construct the soft-measurement models to estimate flow rate deviation. With the close loop gas flow standard facility of NIM in China, there were 6 flow points selected to conduct test experiments on the DN200 ultrasonic gas...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.130
· Download
Lianfeng Cheng, Chao Xing, Xiaopeng Li, Fan Chen,HuanchangWei, Tao Meng, Huichao Shi
In the actual flow measurement process, flow fluctuations often propagate in the pipeline, which may cause large deviations in the flow measurement results. In order to systematically study the influence of different flow fluctuations on the measurement results of the flowmeter, it is necessary to simulate different controllable flow fluctuations in the pipeline. This paper designs different wave control methods for a vane flow fluctuation generator, and uses LabVIEW programming to control the motor to drive the butterfly valve to swing, forming controllable flow fluctuation of sine wave,...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.129
· Download
Xinli Dong, Liang Wang, Donghong Huang, Han Zhang,Hui Jie, Xiangmin Dong, Yong Li
Based on the specific situation of city gas in Beijing, the technical scheme of city gas energy measurement for different users was proposed in this paper. Combined with the experimental data, the sources of the uncertainty of city gas energy measurement were analyzed from the aspects of volume flow, calorific value per unit volume, integration method and other relevant factors under the measurement reference conditions.Meanwhile, the uncertainty of city gas energy measurement was evaluated. This study puts forward the technical scheme and uncertainty evaluation of natural gas energy...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.128
· Download