Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
MODELING OF THE DRYING PROCESS OF AGRICULTURAL PRODUCTS: LUIKOV’S APPROACH CONSIDERING VARIABLE PARAMETERS AND USE OF GITT
Submission Author:
Cristiane Kelly Ferreira da Silva , PB , Brazil
Co-Authors:
Mauricio Gaggero, Fabiano Cordeiro Cavalcanti
Presenter: Cristiane Kelly Ferreira da Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0482
Abstract
The drying of agricultural foods is one of the first techniques used by humans in order to preserve food without changing its nutritional value, taste, texture, etc. Drying consists of removing moisture from a product, which is made through a combination of heat and ventilation. The physical phenomena present in the drying process are heat and mass transfer, which are manifested through the conduction, convection, diffusion and evaporation mechanisms, respectively. The objective of this work was to research about the simultaneous transfer of heat and mass during a drying process of an agricultural product, through the approach of a mathematical model with an hybrid solution. For this purpose, the Luikov’s model was used, which considers heat and mass transfer as a coupled problem. In the Luikov’s approach, certain thermophysical parameters are defined, associated with the dimensionless numbers Lu, Biq and Bim, which in this work were considered as functions of time. The Generalized Integral Transformation Technique was used to solve the differential equations. Six cases were studied, varying the Lu, Biq and Bim parameters, following increasing and decreasing linear functions. The results showed a strong dependence of the model in relation to the studied parameters, making interesting the experimental study of the phenomenon.
Keywords
Solar drying, Luikov, GITT
