Assessment of the Dimensionless Groups-Based Scale-Up of Gas–Solid Fluidized Beds
Abstract
The most common scale-up approach for gas–solids fluidized beds is based on matching the governing dimensionless parameters. In the literature, this approach has been validated only by means of measuring global parameters between different sizes of fluidized beds. However, such global measurements are not sufficient to depict all the interplaying hydrodynamic phenomena and hence verify the scale-up relationships. Therefore, to assess this approach, an advanced gas–solids optical probe and pressure transducer measurement techniques have been applied to quantify local hydrodynamic parameters in two different sized fluidized beds. Four different sets of experimental conditions were designed and conducted to examine the assessment of the scaling approach with matched and mismatched dimensionless groups between the two beds. The results indicated that the reported dimensionless groups are not adequate for achieving similarity between the two gas–solids fluidized beds in terms of solids holdup, gas holdup, particle velocity, mass flux, and pressure fluctuation. This finding demonstrates the importance of local measurements of the hydrodynamic parameters of fluidized beds in order to evaluate scale-up relationships. Finally, the results further advance the understanding of the gas–solids fluidized beds and present deeper insight into their solids dynamics.
Recommended Citation
F. M. Zaid et al., "Assessment of the Dimensionless Groups-Based Scale-Up of Gas–Solid Fluidized Beds," Processes, vol. 11, no. 1, article no. 168, MDPI, Jan 2023.
The definitive version is available at https://doi.org/10.3390/pr11010168
Department(s)
Chemical and Biochemical Engineering
Keywords and Phrases
Dimensionless Groups; Fluidized Beds; Optical Probe; Phase Holdup; Pressure Transducer; Scale-Up
International Standard Serial Number (ISSN)
2227-9717
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jan 2023
