Simulation of heat transfer in the spray dryer feed container and its temperature control
Abstract
Bioactive components from plant sources are often unstable against factors such as radiation and temperature changes, which implies that their conservation and management is a challenge. One method to stabilize these types of components is spray drying, which consists of sprinkling a liquid solution in a distributed manner in the drying chamber that circulates hot air, to eliminate the water and obtain a powder. The first control point is during the feeding of the equipment, since it must be kept in a temperature range or otherwise it could generate an unfavorable modification in the thermolabile components. The objective of the work was to predict from numerical calculations of the heat transfer in the feeding container of the drying system, the effect of the finite evaluation time, and the convective and conductive heat transfer coefficients on the thermal history, in addition of power supply requirements to maintain controlled temperature.
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