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Abstract:

A drying model was developed for a composite material using the finite-difference method and applied to drying of twigs of "yerba maté". Drying experiments were carried out in a convective dryer with twigs with and without bark for three different diameters: 2.5 × 10-3, 5.0 × 10-3 and 7.5×10-3 m. Air temperature varied between 70 and 130°C. Moisture diffusion coefficient value was used to fit the developed model. This parameter was found to be dependent on temperature, moisture content and twig diameter. Moisture diffusion coefficients for xylem were greater than those found for bark. Their values varied between 1.7 × 10-10 and 8.3 × 10-9 m2/s for xylem and 8.7 × 10-12 and 4.7 × 10-9 m2/s for bark. Minor values of mean percent error were obtained dividing experiences in two groups: below and above 100°C. © 2004 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Modelling the drying of a twig of "yerba maté" considering as a composite material Part II: Mathematical model
Autor:Schmalko, M.E.; Alzamora, S.M.
Filiación:Coll. of Exact, Chem. and Life Sci., National University of Misiones, 1552 Felix de Azara St., 3300 Posadas, Misiones, Argentina
Departamento de Industrias, Fac. de Cie. Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:"Yerba maté"; Drying; Modelling; Moisture diffusion coefficient; Diffusion; Drying; Error analysis; Finite difference method; Moisture; Thermal effects; Moisture diffusion coefficient; Twigs; Xylem; Composite materials; Croton ovalifolius; Ilex; Ilex paraguariensis
Año:2005
Volumen:67
Número:3
Página de inicio:267
Página de fin:272
DOI: http://dx.doi.org/10.1016/j.jfoodeng.2004.04.027
Título revista:Journal of Food Engineering
Título revista abreviado:J Food Eng
ISSN:02608774
CODEN:JFOED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v67_n3_p267_Schmalko

Referencias:

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Citas:

---------- APA ----------
Schmalko, M.E. & Alzamora, S.M. (2005) . Modelling the drying of a twig of "yerba maté" considering as a composite material Part II: Mathematical model. Journal of Food Engineering, 67(3), 267-272.
http://dx.doi.org/10.1016/j.jfoodeng.2004.04.027
---------- CHICAGO ----------
Schmalko, M.E., Alzamora, S.M. "Modelling the drying of a twig of "yerba maté" considering as a composite material Part II: Mathematical model" . Journal of Food Engineering 67, no. 3 (2005) : 267-272.
http://dx.doi.org/10.1016/j.jfoodeng.2004.04.027
---------- MLA ----------
Schmalko, M.E., Alzamora, S.M. "Modelling the drying of a twig of "yerba maté" considering as a composite material Part II: Mathematical model" . Journal of Food Engineering, vol. 67, no. 3, 2005, pp. 267-272.
http://dx.doi.org/10.1016/j.jfoodeng.2004.04.027
---------- VANCOUVER ----------
Schmalko, M.E., Alzamora, S.M. Modelling the drying of a twig of "yerba maté" considering as a composite material Part II: Mathematical model. J Food Eng. 2005;67(3):267-272.
http://dx.doi.org/10.1016/j.jfoodeng.2004.04.027