This work introduces a compartment model based on a discrete element method (DEM) model. The DEM model determines the residence times (RTs) of particles in the active (in contact with air) and passive zones. The extracted RT is combined with the heat and mass transfer models into a compartment model, where particles are modeled by employing a population balance. Heat and mass transfer models contain efficiency coefficients that are modeled with surrogates generated from a reduced set of experiments. The resulting surrogate models are validated with additional experiments in an industrial facility. It accurately reproduces the heat and mass transfer in the dryer (±10% of relative error in temperature prediction) and provides a guess of the distribution of the properties of the particles (e.g., moisture content and temperature) across particle sizes and locations within the dryer.

中文翻译：

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基于离散元法的化肥生产旋转干燥机混合室模型

这项工作介绍了基于离散元法 (DEM) 模型的隔间模型。 DEM 模型确定颗粒在主动（与空气接触）和被动区域中的停留时间 (RT)。提取的 RT 与传热和传质模型结合到隔室模型中，其中通过采用群体平衡对粒子进行建模。传热和传质模型包含效率系数，这些效率系数是用一组减少的实验生成的替代项进行建模的。由此产生的替代模型通过工业设施中的额外实验进行了验证。它准确地再现了干燥机中的热量和质量传递（温度预测的相对误差为 ±10%），并提供了对颗粒特性（例如水分含量和温度）在干燥机内的颗粒尺寸和位置的分布的猜测。烘干机。