Volume 2, Issue 4, December 2016, Page: 22-36
Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler
Ishan Kafle, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Sajesh Bhochhibhoya, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Lokesh Paudel, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Pradeep Parajuli, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Sojan Prajapati, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Pratisthit Lal Shrestha, Department of Mechanical Engineering, Kathmandu University, Dhulikhel, Kavre, Nepal
Received: Oct. 31, 2016;       Accepted: Dec. 1, 2016;       Published: Dec. 30, 2016
DOI: 10.11648/j.ijfmts.20160204.11      View  7927      Downloads  268
Abstract
This research deals with the design and analysis of the nozzle and bed materials required for fluidized bed boiler. The design parameters (Diameter of the bed particle, Range of the terminal velocities, Minimum Fluidization /Bubbling velocities, Maximum amplitude and steady velocities) were calculated using Microsoft Excel by interpreting and solving various formulas. Best bed material was selected on the basis of their various characteristics like porosity, adhesive or cohesive properties, resistance to flow etc. An important characteristic change of air distributor velocity with combustion chamber temperature has been established. ANSYS was used as a simulation tool for the analysis. Static Structural solver was used to carry out the strength analysis of the designed wind box. Likewise, computational fluid dynamics (CFD) was carried out using FLUENT solver. Air flow inside the wind box and fluidization phenomena was verified using FLUENT. Furthermore, the designed system was checked for its validity by comparing the results from the Excel sheets and theoretical calculations with simulation results. Lastly, correlation between temperature and velocity inside combustion temperature were determined to identify their relationship with each other.
Keywords
CFD, Fluidization, Fluidized Bed Boiler, Wind Box
To cite this article
Ishan Kafle, Sajesh Bhochhibhoya, Lokesh Paudel, Pradeep Parajuli, Sojan Prajapati, Pratisthit Lal Shrestha, Design and Analysis of Air Distributors and Bed Materials of Fluidized Bed Boiler, International Journal of Fluid Mechanics & Thermal Sciences. Vol. 2, No. 4, 2016, pp. 22-36. doi: 10.11648/j.ijfmts.20160204.11
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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