Journal of Researches in Mechanics of Agricultural Machinery

Journal of Researches in Mechanics of Agricultural Machinery

Simulation of fluidized bed dryer using Computational Fluid Dynamics (CFD)

Document Type : Research Paper

Authors
Esmaeil Abedi 1
Hasan Ghafori 2
1 Department of Mechanical Engineering, Kashan Branch, Islamic Azad University, Kashan, Isfahan, Iran.
2 Department of Biosystems Engineering, Isfahan (khorasgan) Branch, Islamic Azad University, Isfahan. Iran
10.22034/JRMAM.2024.14697.696
Abstract
Dryers play a very important role in the processing of food, chemical and pharmaceutical products. The drying performance depends on various factors such as the type of dryer, the temperature and speed of the air entering the dryer, the size and amount of input, the remaining time of the material in the chamber. For this reason, it is necessary to carry out specific studies in the field of drying products. On the other hand, designing, manufacturing and equipping dryers with sensors to measure various parameters is a costly process, and numerical and simulation methods have been used in recent researches to analyze dryers. Therefore, in this article, the parameters affecting the drying process in a cross-flow fluidized bed dryer with a tray were investigated by CFD method. For this purpose, the effect of material mass flow in 3 levels is 2.76, 5.76 and 1.8 degrees per hour, the speed of incoming hot air in 4 levels is 2.5, 3, 4 and 5 meters per second and the temperature of hot air in 4 The levels of 50, 60, 70 and 80°C on the speed and pressure inside the chamber were evaluated by ANSYS fluent 18 software. The results showed that an increase in temperature led to an increase in air pressure and speed inside the chamber and in the bed. Increasing the flow led to a decrease in pressure and speed.
Keywords
Fluidized bed dryer
Simulation
Cross flow
CFD
Subjects
Babalis, S. J., & Belessiotis, V. G. (2004). Influence of the drying conditions on the drying constants and moisture diffusivity during the thin-layer drying of figs. Journal of Food Engineering, 65(3): 449-458.
 
Borel, L. D. M. S., Marques, L. G., & Prado, M. M.  (2020). Performance evaluation of an infrared heating-assisted fluidized bed dryer for processing bee-pollen grains. Chemical Engineering and Processing - Process Intensification, 155: 108044.
 
Celen, S., & Pektas, S. (2024). Optimization of Factors Affecting the Performance of a Fluidized Bed Dryer. The Philippine Agricultural Scientist, 107(1): 44-54.
 
Chuwattanakul, V., & Eiamsa-ard, S. (2019). Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators. Case Studies in Thermal Engineering, 13: 100389.
 
Chuwattanakul, V.,  Wongcharee, K., Pimsarn, M., Chokphoemphun, S., Chamoli, S., & Eiamsa-ard, S. (2022). Effect of conical air distributors on drying of peppercorns in a fluidized bed dryer: Prediction using an artificial neural network. Case Studies in Thermal Engineering, 36(4): 102188.
 
Das, H. J., Mahanta, P., Saikia, R., & Aamir, M. S. (2020). Performance Evaluation of drying characteristics in conical bubbling fluidized bed dryer. Powder Technology, 374: 534-543.
 
Ercetin, U., & Uralcan, IY. (2009). Experimental analysis of the drying of parboiled wheat in fluidized bed. Journal of Engineering and Architecture Faculty of Eskisehir Osmangazi University, 22(3): 89–99.
 
Jin, H., Wu, Q., Wang, S., & He, Y. (2024). Heat and mass transfer performance of non-spherical wet particles in a fluidized bed dryer. Applied Thermal Engineering, 236, 121780.
 
Ma, Z., Tu, Q., Liu, Z., Xu, Y., Ge, R., & Wang, H. (2023). CFD-DEM investigation of the gas-solid flow characteristics in a fluidized bed dryer. Chemical Engineering Research and Design, 196: 235-253.
 
Mohseni, M., Kolomijtschuk, A., Peters, B., & Demoulling, M. (2019). Biomass drying in a vibrating fluidized bed dryer with a Lagrangian-Eulerian approach. International Journal of Thermal Sciences, 138: 219-234.
 
Nabizadeh, A., Hassanzadeh, H., Asadieraghi, M., Hassanpour, A., Moradi, D., Keshavarz Moraveji, M., & Hozhabri Namin, M. (2020). A parametric study of the drying process of polypropylene particles in a pilot-scale fluidized bed dryer using Computational Fluid Dynamics. Chemical Engineering Research and Design, 156: 13-22.
 
Parlak, N. (2014). Investigation of drying kinetics of ginger in a fluidized bed dryer. Journal of the Faculty of Engineering and Architecture of Gazi University, 29(2): 261–269.
 
Perazzini, H., Perazzini, M. T. B., Meili, L., & Freire, F. B. (2020). Artificial neural networks to model kinetics and energy efficiency in fixed, fluidized and vibro-fluidized bed dryers towards process optimization. Chemical Engineering and Processing - Process Intensification, 156: 108089.
 
Rosli, M., Nasir, A. M. A., & Takriff, M. S.(2020). Drying sago pith waste in a fluidized bed dryer. Food and Bioproducts Processing, 123: 335-344.
 
Sitorus, A., Novrinaldi, N., Putra, S. A., Cebro, I. S., & Bulan, R. (2021). Modelling drying kinetics of paddy in swirling fluidized bed dryer. Case Studies in Thermal Engineering, 28: 101572.
 
Zoghi, T., Shahhoseinirogh, S., & Nosrati, K. (2017). New Design of Cross-flow Fluidized Bed Dryers. Amirkabir Journal of Mechanical Engineering, 50(6): 1351-1360.
 
Zhou, L., Lv, W., Bai, L., Han, Y., Wang, J., Shi, W., & Huang, G. (2022). CFD–DEM study of gas–solid flow characteristics in a fluidized bed with different diameter of coarse particles. Energy Reports, 8: 2376-2388.