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首页> 外文期刊>Biotechnologie, Agronomie Societe et Environnement >Comparison of two drying models applied to corn drying in fluidized bed.Original Title Comparaison d'un modele empirique et d'un modele physique de sechage de grains de mais en lit fluidise.
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Comparison of two drying models applied to corn drying in fluidized bed.Original Title Comparaison d'un modele empirique et d'un modele physique de sechage de grains de mais en lit fluidise.

机译：流化床玉米干燥中使用的两种干燥模型的比较。流化床玉米谷物干燥的经验模型和物理模型的比较。

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摘要

In this article, two predictive models of the temperature and water content of corn grains during their drying in a fluidized bed are compared. The first model is a simplified one, where the physical phenomena implied in the process are not described. It can be solved using freewares available on Internet. The second is a more complex model, based on the basic physical laws governing the phenomena of heat and mass transfer within the product. It requires the use of commercial finite element software to solve it. The two models are parameterized with four dryings where the temperature remains constant during the process, then validated on dryings with variable temperature and an intermittent drying. The two models are able to describe with an acceptable precision the evolutions of water content during continuous dryings, and to predict the evolutions of water content during dryings with variable temperature and the intermittent drying. The dynamic model is however not able to describe the evolution of the grains temperature during dryings at variable temperature with a precision lower than 1 degrees C. If this precision is sufficient, the use of the dynamic model will reduce considerably the costs in time and license of software for the modeling of the corn drying in a fluidized bed.
机译：在本文中，比较了玉米颗粒在流化床干燥过程中温度和水分含量的两种预测模型。第一个模型是简化模型，其中未描述过程中隐含的物理现象。可以使用Internet上提供的免费软件来解决。第二个模型是一个更复杂的模型，基于控制产品内部传热和传质现象的基本物理定律。它需要使用商业有限元软件来解决。通过四个干燥过程对两个模型进行参数化，其中在过程中温度保持恒定，然后在可变温度干燥和间歇干燥过程中进行验证。这两个模型能够以可接受的精度描述连续干燥过程中水含量的变化，并预测可变温度干燥和间歇干燥过程中水含量的变化。但是，动态模型无法描述温度低于1摄氏度的可变温度下干燥过程中谷物温度的变​​化。如果此精度足够，则使用动态模型将大大减少时间和许可成本流化床中玉米干燥建模软件的设计。

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