NDLI: Measuring and calibrating flow rate of primary air for medium speed mills by numerical simulation

Content Provider	IEEE Xplore Digital Library
Author	Xianran Zhu Zhenning Zhao Qingfeng Zhang
Copyright Year	2011
Description	Author affiliation: North China Electric Power Research Institute Co., Ltd., Beijing, China (Xianran Zhu; Zhenning Zhao; Qingfeng Zhang)
Abstract	The numerical model is built for the primary air duct of the pulverizing system with medium speed mills, and the inner flow fields are simulated by employing the commercial code of FLUENT. The simulated results show that the lengths of the straight ducts before and behind the measuring element are too short to meet the requirement of the flow rate measurement of the primary air due to the compact design in many domestic power plants. The actual flow at the cross section where the measuring element is installed is irregular and disordered and the air velocity obtained by the single measuring element is not the area-weighted average value. The blowing of cool primary air also aggravates the disorder of the flow fields. It is concluded that the flow rate of the primary air can not be measured precisely. The numerical simulation method could be adopted to measure and calibrate the flow rate of the primary air, which can avoid the limitations of the existing method. This solution could improve the precision and reduce the cost of the measurement, which will be a good alternative for the domestic power plants.
Starting Page	1386
Ending Page	1389
File Size	377771
Page Count	4
File Format	PDF
ISBN	9781424494361
e-ISBN	9781424494392
DOI	10.1109/MACE.2011.5987203
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Employee welfare Fluid flow measurement Power measurement Medium speed mill Ducts Primary air Numerical simulation Calibration Velocity measurement Power generation
Content Type	Text
Resource Type	Article

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