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| Stack Flowrate Standard Facility |
| DENG Qian-feng1,2,ZHANG Liang2,FANG Li-de1,WANG Chi2,3,LIU Yang4,5 |
1. College of Quality and Technical Supervision, Hebei University, Baoding,Hebei 071002, China
2. National Institute of Metrology, Beijing 100029, China
3. Zhengzhou Institute of Metrology, Zhengzhou, Henan 450001, China
4. Henan Key Laboratory of Environmental Monitoring Technology, Zhengzhou,Henan 450004, China
5. Henan Ecological Environmental Monitoring Center, Zhengzhou,Henan 450004, China |
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Abstract In order to solve the problem of traceability of stack flowmeter, a stack flowrate standard facility was developed in National Insititute of Metrology. The facility uses a laser Doppler velocimeter which is calibrated by a spinning disk to traceable to SI unit as primary standard meter. The laser Doppler velocimeter was used to scan the flow profile and an ultrasonic flowmeter was used to correct the flow fluctuation. After calibrated by the laser Doppler velocimeter, the 8-path ultrasonic flowmeter is used as the working standard, the flow range is 908~104840m3/h, the expanded uncertainty of the facility is 0.62% (k=2), it can calibrate the flowmeter with a largest diameter of 1 meter. The test section of the facility includes circular pipelines and a rectangular pipeline, which can study the measurement performance of stack flowmeters.
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Received: 24 October 2019
Published: 14 May 2020
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2020, Vol. 41 
