|Table of Contents|

 Influence of Upstream Pip Bends on the Water Flow 
Measurement Accuracy of Industrial Boiler
(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2018年06期
Page:
18-23
Research Field:
材料科学与工程
Publishing date:

Info

Title:
 Influence of Upstream Pip Bends on the Water Flow 
Measurement Accuracy of Industrial Boiler
Author(s):
 SU Baohuan12L Wei1QI Guoli2ZHANG Songsong2FU Xiulan3
 1.School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, China;
2. Research and Testing Center for Energy Conservation,China Special Equipment Inspection and Research Institute, Beijing 100029,China;
3. Xinxin Environmental heat limited responsibility company in Datong, Datong 037043, China
Keywords:
 Keywords:pip bend industrial boiler flow time difference ultrasonic flowmeter relative error accuracy
PACS:
TK313
DOI:
10.15938/j.jhust.2018.06.004
Abstract:
 Abstract:This paper focus on the influence of water flow measurement accuracy by using ultrasonic flowmeter in industrial boiler when setting upstream pip bends. Based on measuring principle of time difference ultrasonic flowmeter, the physical model of boiler pipe bends in different diameter and different flow were established and the corresponding boundary condition was given, numerical simulation was proceeded using finite volume method. The result shows that the speed of the fluid in downstream pip bend is not in ideal uniform distribution state which has a larger influence on the accuracy of flow measurement:the theoretical flow measurements are smaller than the actual value,and in the different measuring position,the relative error fluctuation of the measurement is within -15%~-1%;the measurement accuracy increases with the raise of the distance between test locations and pip bends in the range of the first 10 times pip diameter and the measurement accuracy is within 5% in 10D~40D range;under the same measurement condition,the flow measurement accuracy decreases with the increase of tube working medium flow;at all the measurement range of the flow, the relative error of the flow measurement of changes becomes smaller when the diameter is larger than before which means the error curve is flat.

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Last Update: 2019-03-18