Drying of foods: Evaluation of a drying model

An analysis of the transport phenomena occurring during food drying process

“…Wang and Brennan (1995) developed a monodimensional model for the simultaneous heat and mass transfer within potatoes slices. The hypothesis of monodimensional transport was experimentally verified in the same study and used also by other authors (Kalbasi & Mehraban, 2000;Migliori, Gabriele, de Cindio, & Pollini, 2005;Rovedo, Suarez, & Viollaz, 1995). Thorvaldsson and Janestad (1999) analysed drying of porous media, like bread, considering water evaporation on all the exposed surfaces.…”

Measuring moisture diffusivity of potato and carrot (core and cortex) during convective hot air and isothermal drying

“…Usually the effective moisture diffusivity strongly depends upon moisture content when the moisture content is below 0.1 kg/kg dry solids (Jason, 1958;Rizvi, 1986). Rovedo, Suarez, and Viollaz (1995) analyzed the drying of potato slabs and found that the diffusion coefficient was not dependent on moisture during the first falling rate period. Temperature dependence of the effective diffusivity has been shown to follow an Arrhenius relationship (Jason, 1958;Luyben, Olieman, & Bruin, 1980;Saravacos & Charm, 1962;Singh, Lund, & Buelow, 1984;Suarez, Viollaz, & Chirife, 1980;Vaccarezza, Lombardi, & Chirife, 1974):…”

“…Similar behavior was also observed during drying of sugar beet root and potato. Rovedo et al (1995) also obtained temperature and weight loss data of potato samples being dried. The temperature profiles in each case showed temperature of the potato samples varying with time and not reaching the drying temperature until 95% of the moisture of the potato was removed.…”

Mathematical Modeling of the Fluidized Bed Drying of Cubic Materials

“…Many experimental and theoretical investigations on the convective drying processes of capillary-porous materials in fluidized beds have been carried out in recent years, and several simulation models for natural and forced convection drying systems have been developed [3][4][5][6]. The modeling of batch fluidized bed drying of slab shaped potatoes was reported by Revedo et al [7], Wang and Brennan [8], Senadeera et al [9] and many others.…”