Modeling of heat and mass transfer in fluidized bed dryers using the volumetric heat transfer coefficient. Part 2: calculation algorithm based on the heat and mass transfer model

Abstract

For fluidized bed drying, the heat and mass transfer process can be modeled by using the volumetric heat transfer coefficient between the drying gas and the particulate matter. Part 1 of this series offered a heat and mass transfer model developed for calculating the particles and drying gas conditions in a fluidized bed dryer. In this part, an algorithm was developed based on this model. The variation of parameters along the height of the dryer and versus drying time can be calculated. The results of the simulation have been validated by using experimental data from a pilot plant fluidized bed dryer with agricultural seeds. We found that the method of determining the logarithmic temperature difference greatly influences the values of the drying parameters and thus the drying time and the height of the desorption zone.

Keywords:

• Fluidized bed dryer
• volumetric heat transfer coefficient
• heat and mass transfer model
• particulate matter

Declarations of interest

None.

Acknowledgements

Special thanks to Dr. Mária Örvös and to Dr. Mihály Parti for their help in this work. We would also like to thank the Reviewers to make our manuscript more understandable.

Additional information

Funding

This work was supported by Hungarian Ministry of Human Capacities (NTP-NFTÖ-20-B-0015). We also greatly appreciate the financial funding provided by Gedeon Richter Plc. Centenarial Foundation (H-1103 Budapest, Gyömrői utca 19-21., Hungary). The research reported in this paper and carried out at BME has been supported by the NRDI Fund (TKP2020 IES, Grant No. BME-IE-BIO, Grant No. BME-IE-VÍZ) based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology.