The Effect of Cylinder Rotation Speed on Temperature Distribution in Rotary Dryer
Downloads
The thermal conditions inside a rotary dryer are influenced by the cylinder rotation speed, which determines the distribution of hot air during the drying process. These differences in thermal conditions affect the drying chamber's ability to utilize available heat. This study evaluated the effect of varying cylinder rotation speeds on the temperature profile and heat utilization effectiveness in the corn drying process. Tests were conducted for 6 hours using three variations in cylinder rotation speeds. The inlet air temperature, drying chamber temperature, and outlet air temperature were recorded every 30 minutes using a thermocouple. Heat utilization effectiveness was determined based on the relationship between the inlet air temperature, drying chamber temperature, and ambient temperature. During the drying process, the inlet air temperature was in the range of 70.2–73.5°C, while the drying chamber temperature and outlet air temperature changed as the drying process progressed. Heat utilization effectiveness increased from approximately 80% at the beginning of the drying process to approximately 90% at the end of the process. Different cylinder rotation speeds resulted in different temperature profile characteristics, followed by changes in heat utilization effectiveness in the drying chamber. Higher rotation speeds were able to maintain more stable thermal conditions, resulting in better heat utilization. These findings indicate that adjusting the cylinder rotation speed is an important parameter for improving the thermal performance of a rotary dryer in the corn drying process.
Alit, I. B., & Susana, I. G. B. (2025). Thermal Performance of LPG Stove as Heat Source of Rotary Dryer for Drying Corn for Small Farmers. Jurnal Teknik Pertanian Lampung, 14(2), 537–546. https://doi.org/10.23960/jtep-l.v14i2.537-546
Alit, I. B., Susana, I. G. B., & Mara, I. M. (2020). Utilization of rice husk biomass in the conventional corn dryer based on the heat exchanger pipes diameter. Case Studies in Thermal Engineering, 22, 100764. https://doi.org/10.1016/j.csite.2020.100764
Susana, I. G. B., Alit, I. B., & Okariawan, I. D. K. (2023). Rice husk energy rotary dryer experiment for improved solar drying thermal performance on cherry coffee. Case Studies in Thermal Engineering, 41, 102616. https://doi.org/10.1016/j.csite.2022.102616
Li, B., Zeng, Z., Zhang, X., & Zhang, Y. (2021). Study on the Variable-Temperature Drying Process of Corn Drying in an Industrial Corn-Drying System Equipped with a Self-Adaptive Control Heat Exchanger. Applied Sciences, 11(6), 2772. https://doi.org/10.3390/app11062772
Baidhe, E., Clementson, C. L., Hellevang, K., & Zhulu, L. (2025). Comprehensive Analysis of Drying Kinetics, Heat and Mass Transfer, and Thermodynamic Properties in High-Temperature Drying of High-Moisture Corn. Journal of Food Process Engineering, 48(6), e70159. https://doi.org/10.1111/jfpe.70159
Rodviboonchai, P., & Soponronnarit, S. (1992). Corn Drying by a Rotary Dryer: A Mathematical Model and Drying Strategy. Agriculture and Natural Resources, 26(1), 50–59.
Xie, Q., Chen, Z., Mao, Y., Chen, G., & Shen, W. (2018). Case studies of heat conduction in rotary drums with L-shaped lifters via DEM. Case Studies in Thermal Engineering, 11, 145–152. https://doi.org/10.1016/j.csite.2018.02.001
Trojosky, M. (2019). Rotary drums for efficient drying and cooling. Drying Technology, 37(5), 632–651. https://doi.org/10.1080/07373937.2018.1552597
G.F.M.V. Souza, P.S. Avendaño, M.C.C. Francisquetti, F.R.C. Ferreira, C.R. Duarte, M.A.S. Barrozo. (2020). Modeling of heat and mass transfer in a non-conventional rotary dryer. Applied Thermal Engineering, 182, 116118. https://doi.org/10.1016/j.applthermaleng.2020.116118
Incropera, F. P., Bergman, T. L., Lavine, A. S., & DeWitt, D. P. (2017). Fundamentals of Heat and Mass Transfer (8th ed.). John Wiley & Sons.
Çengel, Y. A., & Ghajar, A. J. (2020). Heat and Mass Transfer: Fundamentals and Applications (6th ed.). McGraw-Hill.
Mujumdar, A. S. (2014). Handbook of Industrial Drying (4th ed.). CRC Press.
Geankoplis, C. J., Hersel, A. A., & Lepek, D. H. (2018). Transport Processes and Separation Process Principles (5th ed.). Pearson.
Habibi, M. A. F., Sutanto, R., & Wirawan, M. (2026). Effect of Cylinder Rotation Speed on Corn Drying Characteristics in a Rotary Dryer. Journal of Mechanical Engineering, Science, and Innovation, 6(1).
Defraeye, T. (2014). Advanced computational modelling for drying processes—A review. Applied Energy, 131, 323–344.
