基于Weibull函数的平贝母热风干燥特性

为探索平贝母在干燥过程中的内部水分变化规律,实现对其含水率的实时监测,为平贝母的干燥工艺和过程设计提供理论依据,利用干燥箱分别在45、55、65℃条件下获得平贝母的热风干燥特性曲线,并以R2、χ2和RMSE为评价指标,采用常用的4种经典干燥模型建立平贝母干燥动力学模型.试验结果表明:Weibull模型与其他干燥模型相比...

Drying Characteristics of Fritillaria by Hot-wind Based on Weibull Function

For the purpose of exploring the change law of internal moisture in Fritillaria during drying,to realize the real-time monitoring of the moisture content,and provides a theoretical basis for the drying process design of Fritillaria.In the experimental part,the hot-air drying characteristic curve of Fritillaria was obtained in the dry-box at 45℃,55℃and65℃firstly,with taking R²,χ²and RMSE as the evaluation index.Then,the drying kinetic model of Fritillaria was established by using four classical drying models.The experimental results show that the Weibull model can better simulate the hot air drying process of Fritillaria than other drying models.Among them,the scale parameterαdecreases significantly with the increase of drying temperature,but the shape parameterβwas not.The effective estimated diffusion coefficient is 1.229×10^-10~3.218×10^-10m²/s and drying activation energy of water is 43.296kJ/(mol·k)based on Weibull function.To sum up,this study provides technical and theoretical basis for the industrial drying of Fritillaria by using modern drying technology.