Data/hora: 05/06/2024 04:21:55

Provedor de dados: | 91
País: | Brazil
Título: | Periods of constant and falling-rate for infrared drying of carrot slices
Autores: | Botelho,Fernando M.; Corrêa,Paulo C.; Goneli,André. L. D.; Martins,Márcio A.; Magalhães,Felipe E. A.; Campos,Sílvia C.
Data: | 2011-08-01
Ano: | 2011
Palavras-chave: | Modeling; Dehydration; Water diffusion.
Resumo: | The aim of this work was to study the infrared drying process of carrot slices and to determine coefficients related to the heat and mass transfer of the process. Fresh carrots were used, dried until constant weight in a dryer with infrared heating source. Different models were utilized to fit the experimental data of constant and falling drying rate periods. It was verified that the coefficients of heat and mass transfer, during the constant drying rate, significantly increased with temperature on rise. The Diffusion Approximation, Two Terms, Midili and Verna models satisfactory represented the falling period of drying rate of carrot slices. The effective diffusion coefficient increased with temperature and this relationship can be represented by the Arrhenius equation, obtaining activation energy to the drying process of 29.092 kJ mol-1.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000800012
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/S1415-43662011000800012
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.15 n.8 2011
Fonte: | info:eu-repo/semantics/openAccess