Drying and Heating Processes in Arbitrarily Shaped Clay Materials Using Lumped Phenomenological Modeling

Drying and Heating Processes in Arbitrarily Shaped Clay Materials Using Lumped Phenomenological Modeling

This work aims to study the drying of clay ceramic materials with arbitrary shapes theoretically. Advanced phenomenological mathematical models based on lumped analysis and their exact solutions are presented to predict the heat and mass transfers in the porous material and estimate the transport co...

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Bibliographic Details
Published in:Energies (Basel) Vol. 14; no. 14; p. 4294
Main Authors: Lima, Elisiane S., Delgado, João M. P. Q., Guimarães, Ana S., Lima, Wanderson M. P. B., Santos, Ivonete B., Gomes, Josivanda P., Santos, Rosilda S., Vilela, Anderson F., Viana, Arianne D., Almeida, Genival S., Lima, Antonio G. B., Franco, João E. F.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-07-2021
Subjects:
ceramic materials
Ceramics
Clay
Construction materials
Convection
Drying
Energy consumption
Exact solutions
Free convection
Heat
Heat transfer
Heating
Humidity
industrial brick
lumped model
Mathematical models
Moisture content
Moisture removal
Porous materials
Relative humidity
Simulation
Temperature
Transport properties
Water content
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Summary:This work aims to study the drying of clay ceramic materials with arbitrary shapes theoretically. Advanced phenomenological mathematical models based on lumped analysis and their exact solutions are presented to predict the heat and mass transfers in the porous material and estimate the transport coefficients. Application has been made in hollow ceramic bricks. Different simulations were carried out to evaluate the effect of drying air conditions (relative humidity and speed) under conditions of forced and natural convection. The transient results of the moisture content and temperature of the brick, and the convective heat and mass transfer coefficients are presented, discussed and compared with experimental data, obtaining a good agreement. It was found that the lower the relative humidity is and the higher the speed of the drying air is, the higher the convective heat and mass transfer coefficients are at the surface of the brick and in the holes, and the faster the moisture removal material and heating is. Based on the predicted results, the best conditions for brick drying were given. The idea is to increase the quality of the brick after the process, to reduce the waste of raw material and energy consumption in the process.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14144294