Another important aspect that was taken into account when designing a prototype freeze dryer equipped with microwaves was to ensure even air distribution over each of the shelves filled with food products. For this purpose, flow analyzes were performed using a CFD model that was created in the first stages of the project. Several configurations of the position of fans and air guides were considered. The final design allowed for equalizing the air velocity fields in such a way that a velocity > 1 m/s was achieved over each shelf. The analysis results and comparison to the reference machine are presented in the figure below.
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