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Abstract:

The drying of shrinking bodies is analysed by numerically solving a drying model in order to obtain a deeper insight into the drying process, calculating moisture profiles and various forms of Biot number. Moisture profiles shows great differences when different units of concentration are used. Calculated Biot numbers do not satisfactorily explain the drying kinetic curves for solids with a high initial moisture content, because the equilibrium curve is not a straight line. Kinetics drying curves are satisfactorily analysed in terms of variation of total driving force with time, which differs markedly from the corresponding variation of the total driving force in terms of temperature, for a pure heat transfer process © 1998 Elsevier Science Limited. All rights reserved.

Registro:

Documento: Artículo
Título:Analysis of moisture profiles, mass biot number and driving forces during drying of potato slabs
Autor:Rovedo, C.O.; Suarez, C.; Viollaz, P.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina
Palabras clave:Agricultural products; Drying; Heat transfer; Mathematical models; Moisture; Shrinkage; Temperature; Mass Biot number; Potato; Food processing
Año:1998
Volumen:36
Número:2
Página de inicio:211
Página de fin:231
DOI: http://dx.doi.org/10.1016/S0260-8774(98)00041-7
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_v36_n2_p211_Rovedo

Referencias:

  • Aguerre, R.J., Suarez, C., Viollaz, P.E., Enthalpy-entropy compensation in sorption phenomena: Application to the prediction of the effect of temperature on food isotherms (1986) J. Food Sci., 51 (6), pp. 1547-1549
  • Coumans, W.J., Luyben, K.Ch.A.M., Evaluation and prediction of experimental drying curves of slabs (1988) Preconcentration and Drying of Food Materials, pp. 163-172. , ed. Bruin, S. Elsevier Science, Amsterdam, The Netherlands
  • Coumans, W.J., Thijseen, H.A.C., A simplified calculation method for the isothermal drying of solid and hollow systems with any degree of shrinkage (1986) Drying '86, 1, pp. 49-56. , ed. Mujumdar, A., Hemisphere Publishing Corporation: Washington, New York, London
  • Crank, J., (1956) Mathematics of Diffusion, p. 224. , Oxford Clarendon Press, Oxford
  • Hallström, B., Mass Transfer in Foods (1992) Handbook of Food Engineering, 51, pp. 317-339. , Series: Food Science and Technology: A series of monographs, textbooks and reference books, City: Publisher
  • Liu, J.K., Bruin, S., An approximate method for the non-linear diffussion problem with a power relation between diffusion coefficient and concentration (1982) Int. J. Heat Mass Transfer, 25, pp. 1209-1229
  • Liu, T., Coumans, W.J., Regular regime analysis and moisture diffusivity in wood (1993) Drying Technol., 11 (5), pp. 977-1003
  • Luikov, A.V., (1968) Analytical Heat Diffusion Theory, , ed. Hartnett, J. P. Academic Press, New York
  • Nissan, A.H., Kaye, W.G., Bell, J.R., Mechanism of drying thick porous bodies during the falling rate period. I. the pseudo-wet-bulb temperature (1959) J. Am. Inst. Chem. Eng., 5, pp. 103-110
  • Praunitz, J.M., Eckert, C.A., Orye, R.V., O'Connell, J.P., (1967) Computer Simulation for Multicomponent Vapor Liquid Equilibrium, p. 219. , Englewood Cliffs, NJ: Prentice-Hall
  • Rovedo, C.O., (1994) Transferencia Simultánea de Calor y Materia En Sistemas Con Cambio De Volumen: Aplicación Al Secado de Placas de Papa, , PhD thesis. Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
  • Rovedo, C.O., Suarez, C., Viollaz, P.E., Drying simulation of a solid slab with three dimensional shrinkage (1995) Drying Technol., 13 (1-2), pp. 371-393

Citas:

---------- APA ----------
Rovedo, C.O., Suarez, C. & Viollaz, P. (1998) . Analysis of moisture profiles, mass biot number and driving forces during drying of potato slabs. Journal of Food Engineering, 36(2), 211-231.
http://dx.doi.org/10.1016/S0260-8774(98)00041-7
---------- CHICAGO ----------
Rovedo, C.O., Suarez, C., Viollaz, P. "Analysis of moisture profiles, mass biot number and driving forces during drying of potato slabs" . Journal of Food Engineering 36, no. 2 (1998) : 211-231.
http://dx.doi.org/10.1016/S0260-8774(98)00041-7
---------- MLA ----------
Rovedo, C.O., Suarez, C., Viollaz, P. "Analysis of moisture profiles, mass biot number and driving forces during drying of potato slabs" . Journal of Food Engineering, vol. 36, no. 2, 1998, pp. 211-231.
http://dx.doi.org/10.1016/S0260-8774(98)00041-7
---------- VANCOUVER ----------
Rovedo, C.O., Suarez, C., Viollaz, P. Analysis of moisture profiles, mass biot number and driving forces during drying of potato slabs. J Food Eng. 1998;36(2):211-231.
http://dx.doi.org/10.1016/S0260-8774(98)00041-7