A system for measuring bubble voidage and frequency around tubes immersed in a fluidized bed of particles

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Publication Type Journal Article
School or College College of Engineering
Department Chemical Engineering
Creator Whitty, Kevin J.
Other Author Siddoway, Michael
Title A system for measuring bubble voidage and frequency around tubes immersed in a fluidized bed of particles
Date 2010
Description Gas-solid fluidized beds are common in chemical processing and energy production industries. These types of reactors frequently have banks of tubes immersed within the bed to provide heating or cooling, and it is important that the fluid dynamics within these bundles is efficient and uniform. This paper presents a simple, low-cost method for quantitatively analyzing the behavior of gas bubbles within banks of tubes in a fluidized bed cold flow model. Two probes, one containing an infrared emitter and one containing an infrared (IR) detector, are placed into adjacent glass tubes such that the emitter and detector face each other. As bubbles pass through the IR beam, the detector signal increases due to less solid material blocking the path between the emitter and detector. By calibrating the signal response to known voidage of the material, one can measure the bubble voidage at various locations within the tube bundle. The rate and size of bubbles passing through the beam can also be determined by high frequency data collection and subsequent analysis. This technique allows one to develop a map of bubble voidage within a fluidized bed, which can be useful for model validation and system optimization.
Type Text
Publisher American Institute of Physics (AIP)
Journal Title Review of Scientific Instruments
Volume 81
Issue 7
First Page 73305
Last Page 73301
DOI 10.1063/1.3462967
citatation_issn 346748
Language eng
Bibliographic Citation Whitty, K. J., & Siddoway, M. (2010). A system for measuring bubble voidage and frequency around tubes immersed in a fluidized bed of particles. Review of Scientific Instruments, 81(7), 073305-1-073305-5. July
Rights Management (c)American Institute of Physics. The following article by Whitty, K. J., & Siddoway, M. appeared in Review of Scientific Instruments, 81(7) and may be found at doi:10.1063/1.3462967.
Format Medium application/pdf
Format Extent 429,206 bytes
Identifier ir-main,15596
ARK ark:/87278/s6cc1j32
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 705482
Reference URL https://collections.lib.utah.edu/ark:/87278/s6cc1j32