Numerical study on hygroscopic material drying in packed bed

The paper addresses numerical simulation for the case of convective drying of hygroscopic material in a packed bed, analyzing agreement between the simulated and the corresponding experimental results. In the simulation model of unsteady simultaneous one-dimensional heat and mass transfer between gas phase and dried material, it is assumed that the gas-solid interface is at thermodynamic equilibrium, while the drying rate of the specific product is calculated by applying the concept of a "drying coefficient". Model validation was clone on the basis of the experimental data obtained with potato cubes. The obtained drying kinetics, both experimental and numerical, show that higher gas (drying agent) velocities (flow-rates), as well as lower equivalent grain diameters, induce faster drying. This effect is more pronounced for deeper beds, because of the larger amount of wet material to be dried using the same drying agent capacity

Desecación de almendras a altas temperaturas

Peer reviewe

Handling Tomatoes in Pallet Boxes

Excerpt from the report: This study was made at Michigan State University to evaluate several pallet box designs for use in handling tomatoes from the field to the packing or processing plant. Laboratory tests were made of the effects of box construction materials on tomato bruising. Pallet boxes were designed, and field tests were made of bruising of tomatoes handled in pallet boxes of different design and construction. Separate tests were made with processing (ripe) tomatoes and fresh-market (mature-green) tomatoes

Development of a Hydrohandling System for Sorting and Sizing Apples for Storage in Pallet Boxes

Excerpt from the report: Studies were conducted to investigate the properties and characteristics of apple fruits related to sizing, sorting, and filling them into boxes, utilizing water as the handling medium; and to design, construct, and evaluate various components on a pilot scale for a hydrohandling system. The findings provided basic information essential for the development of equipment for sorting and sizing apples destined for storage in pallet boxes