Numerical Simulation Study of Maize in-bin Ventilation Drying in Low Humidity Area
The study of heat and moisture migration inside the grain pile during the drying process of maize in a low-humidity area can provide theoretical support for the optimization of the drying process and its practical appli-cation.This study focused on maize grain piles in a cone-bottom drying bin,employing the finite volume method to simulate natural air ventilation drying under daily,hourly continuous,and intermittent meteorological conditions,as well as low-temperature air ventilation drying with auxiliary heating under daily and hourly continuous meteoro-logical conditions.The study delved into the temperature and moisture content variations in the grain piles during ventilation drying and analyzed the drying costs.The results indicated that when the average moisture content of the dried grain in the drying bin reached the target value of 15％,the natural air ventilation drying daily,hourly con-tinuous,and intermittent conditions required 8.5 d,7.6 d and 4.1 d,respectively,while the low-temperature air ventilation drying required 6.5 d and 4.6 d with daily and hourly continuous conditions.In addition,the drying costs of hourly meteorological conditions,such as intermittent drying,continuous natural air and low-temperature air ventilation drying were analyzed,revealing costs of 0.009 yuan/catty,0.017 yuan/catty and 0.022 yuan/catty respectively,which reduced 0.031 yuan/catty,0.023 yuan/catty and 0.018 yuan/catty,compared to traditional high-temperature hot-air drying,respectively.The results of the study can provide reliable theoretical support and practical guidance for the practical application of maize in-bin drying technology.
in-bin dryingnatural air dryingnumerical simulationmaizedrying cost
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