Effective diffusivity in yacon potato cylinders during drying

Revista Brasileira de Engenharia Agricola e Ambiental

Lisboa, Cícera G. C. de¹  Queiroz, Alexandre J. de M.²  Figueirêdo, Rossana M. F. de³  Gomes, Josivanda P.⁴ 

[1] Instituto Centro de Ensino Tecnológico, Crato, Brazil;Instituto Federal de Educação, Ciência e Tecnologia Rio Grande do Norte, Caicó, Brazil;Instituto Federal de Pernambuco, Afogados da Ingazeira, Brazil;Universidade Federal de Campina Grande, Campina Grande, Brazil

关键词: Smallanthus sonchifolia;    mathematical modelling;    diffusion.;   

DOI  :  10.1590/1807-1929/agriambi.v22n8p564-569

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The aim of this study was to obtain the effective diffusivity of yacon potato in fixed-bed dryer at different temperatures (50, 60 and 70 ºC) and drying air velocities (1.0, 1.5 and 2.0 m s-1). Non-linear regression analysis was performed by the Quasi-Newton method using the program Statistica 7.0, where the parameters of the models were estimated as a function of the drying air temperature. Approximation of Diffusion, Two Terms, Henderson & Pabis, and Page models fitted well the experimental data. Drying air temperature and speed influenced the drying time of the samples. The effective diffusivity increased with increasing temperature, ranging from 1.18 x 10-9 to 2.15 x 10-9 m2 s-1.

【 授权许可】

CC BY