Abstract
An industrial two-layer convective dryer module was fabricated and tested for uniform air velocity distribution. The experiments were carried out by varying deflector angles (20–40°), the number of side air duct flow plates (1–3), and fan frequency (30 Hz to 50 Hz). The results indicated that both the layers exhibited minimal air velocity difference at different locations on the surface of the pellet layer when a single-sided air duct flow plate and 30 Hz fan frequency were used. Only the deflector angle showed different results for the two layers. A 40° deflector angle was better for the upper layer, and a 30° deflector angle was better for the lower layer. These optimum conditions were used for CFD simulation, and the air velocity was simulated, followed by experimental verification. It was found that uniform airflow distribution is possible by managing the number of side duct plates, deflector angle, and fan frequency in the large-scale tunnel dryer that connects similar dryer modules.
Published Version
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