Qian, X. and Yan, Y. (2012) Flow Measurement of Biomass and Blended Biomass Fuels in Pneumatic Conveying Pipelines using Electrostatic Sensor-Arrays. IEEE Transactions on Instrumentation and Measurement, 61 (5). pp. 1343-1352. ISSN 0018-9456.
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Key parameters such as particle velocity, concentration of solid particles, and stability of pulverized fuel flow in fuel injection pipelines are useful to power plant operators to detect fuel supply problems at an early stage. This paper presents the use of a novel multichannel instrumentation system with circular and arc-shaped electrostatic sensor arrays for the online continuous measurement of “mean” and “local” characteristics of blended biomass flow. Experimental tests were conducted on a pneumatic conveying test rig under various flow conditions on both horizontal and vertical pipes. The biomass fuels tested include willow, wood, and bark. A ground grain (flour) was used to replicate a biomass of finer particles. The results suggest that, due to the physical differences between the constituent biomass fuels, the characteristics of the flow depend on the proportion of larger biomass particles in the blend. It is found that pure flour particles travel faster and carry more electrostatic charge than those of larger biomass particles. As more biomass particles are added to the flow, the overall velocity of the flow slows down, the electrostatic charge level decreases, and the flow becomes less stable compared to the pure flour flow. Particles in the vertical pipe are found to be more evenly distributed, and the particle velocity profile across the pipe cross section is more regular when compared to those in the horizontal pipe.
|Uncontrolled keywords:||Biomass-coal flow, blended biomass, cross-correlation, electrostatic sensor, flow measurement, pulverized fuel (PF), velocity measurement|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General) > TA166 Instrumentation|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems|
|Depositing User:||J. Harries|
|Date Deposited:||25 Apr 2012 14:09|
|Last Modified:||01 May 2012 15:09|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/29337 (The current URI for this page, for reference purposes)|
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