Mujaffar Saheeda, John Sherida
Food Science and Technology Unit Department of Chemical Engineering The University of the West Indies St. Augustine Trinidad and Tobago.
Food Sci Nutr. 2018 Apr 17;6(4):1085-1099. doi: 10.1002/fsn3.642. eCollection 2018 Jun.
The objectives of this study were to investigate the effect of temperature (40, 50, 60, and 70°C), and air velocity (0.5, 1, and 2 m/s) on the drying behavior of West Indian lemongrass () leaves. Drying was carried out in a computer-controlled tray dryer. Overall, the effect of temperature was seen to be more important than that of air velocity, but the air velocity did have an effect on drying rates at the start of the drying process at 50-70°C. Drying rate constants, diffusivity values, and activation energy were determined. Twenty-two empirical and semiempirical thin-layer models were tested, and although model fit varied, the Midilli model could be applied to all data with reasonable prediction of values.
本研究的目的是考察温度（40、50、60和70°C）以及风速（0.5、1和2 m/s）对西印度柠檬草（）叶片干燥行为的影响。干燥在计算机控制的盘式干燥器中进行。总体而言，温度的影响比风速更为显著，但在50 - 70°C干燥过程开始时，风速确实对干燥速率有影响。测定了干燥速率常数、扩散率值和活化能。测试了22种经验和半经验薄层模型，尽管模型拟合情况各异，但米迪利模型可应用于所有数据，并能合理预测值。
