Modeling of heat and mass transfer in fluidized bed dryers using the volumetric heat transfer coefficient. Part 1: Equations describing the simultaneous heat and mass transfer

Abstract

The heat and mass transfer model using volumetric heat transfer coefficient has been developed for fluidized bed dryers, to be able to determine the moisture content and temperature of the particles, the temperature and the absolute humidity of the drying gas versus drying time, and the temperature and absolute humidity of the drying gas along the dryer. The volumetric heat transfer coefficient is suitable for characterizing the heat transfer between the irregular shaped particles and the drying gas. Using the equations, the drying time and the height of the desorption zone can be calculated.

Keywords:

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

Acknowledgments

Special thanks to Dr. Mária Örvös, Dr. Mihály Parti and Prof. Dr. Evangelos Tsotsas for their contribution to this work. We would like to thank for the Reviewers to make our manuscript more understandable.

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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.