Flow field analysis and design optimisation of Tibetan medicine double heat pump drying room

Numerical study on the uniform distribution of flow field of airflow dryer

“…When the tobacco silk is dried by the cylinder dryer the temperature is relatively low, usually lower than 150 °C, the drying time is relatively long, usually 3–4 min, the moisture content of the tobacco silk after drying is relatively stable, which can retain the original aroma of the tobacco well, but because the filling amount is relatively small, it is easy to appear dry head and dry tail [ 3 ]. Air flow dryer [ 4 ]adopts high temperature and rapid drying method, its drying temperature is higher, usually more than 200 °C, but drying time is shorter, usually only 1–2 s. Compared with drum drying, air flow drying has advantages such as fast speed, high efficiency, low energy consumption, and easy control and maintenance. However, there is an issue of uneven airflow distribution in the air flow dryer.…”

Design and Experiment of Combined Infrared and Hot-Air Dryer Based on Temperature and Humidity Control with Sea Buckthorn (Hippophae rhamnoides L.)

“…The drying chamber was altered to ensure uniformity based on the simulation results. Shi et al [ 19 ] investigated the non-uniformity issue in the heat-pump drying procedure. They discovered that the airflow uniformity at the fan outlet and the partition opening was relatively poor through simulations with the porous medium model and multi-reference frame model.…”