RESUMEN
Fundamental parameters in dimensioning a "vortex bed" drying apparatus are the pressure drop across the bed and the higher and lower limit of fluidization velocity. The analysis of the Navier-Stokes equations brings to the following functional relations between dimensionless groups: (see journal). These relations define the fluidization conditions in a "vortex bed" apparatus. Experimental tests carried out on a laboratory scale apparatus will provide us with the unknown constants for industrial scale extrapolation.
Asunto(s)
Desecación/instrumentación , Conservación de Alimentos/instrumentaciónRESUMEN
Referring to a typical plant for milk sterilization fixed and variable costs are evaluated at different heat recovery levels. The results of the analysis indicate that the transformation cost significantly decreases increasing heat recovery, and reaches a minimum at 90% heat regeneration. Milk sterilization apparatuses now on the market are characterized by a heat recovery between 40 and 85%.
Asunto(s)
Industria Lechera/instrumentación , Esterilización/instrumentaciónRESUMEN
Different optimization methods are presented (EVOP, Marginal Analysis, ...) as an example of problem approach and resolution in the food industry. Optimal criteria are presented for experiments design and analysis and mathematical models development for process simulation and optimization.