Modeling and optimization of non-isothermal convective drying process of Lavandula×allardii  

作　　者：Vasileios Chasiotis Konstantinos-Stefanos Nikas Andronikos Filios 

机构地区：[1]Laboratory of Thermo Fluid Systems(LTFS),Department of Mechanical Engineering,University of West Attica,Ancient Olive Grove Campus,Thivon Str.250,GR12244 Egaleo,Greece

出　　处：《Information Processing in Agriculture》2024年第1期1-13,共13页农业信息处理（英文）

摘　　要：Non-isothermal convective drying schemes were examined for Lavandula×allardii leaves and inflorescences.Drying process parameters were optimized using response surface methodology(RSM)to ensure the peak operational performance.The effects of temperature increase rate(2–4°C/h)and the airflow velocity(1–3 m/s)on the essential oil yield,drying duration and consumption,were investigated.A face-centered central composite design was deployed and the experimental data was adapted to the most suitable polynomial models,as determined by the regression analysis.Analysis of variance was applied to assess the effects of the process variables,their interactions and the statistical significance of the examined models.Both factors of temperature increase rate and airflow velocity had a significant impact on the drying duration.Airflow velocity had a greater effect on leaves’essential oil yield and inflorescences’process energy consumption,whereas the rates of temperature increase had a greater influence on the inflorescences’essential oil yield and leaves’energy consumption.The minimum drying duration and energy consumption were obtained for the maximum temperature increasing rate at 3 and 1 m/s airflow velocities respectively;and the highest essential oil yield was obtained for the least rate of temperature increase and airflow velocity for both leaves and inflorescences.Numerical optimization was performed for minimizing drying duration and energy consumption by maximizing the essential oil yield.The rate of temperature increases of 4°C/h and the airflow velocity of 1 m/s,were proposed as the optimum non-isothermal drying conditions for both leaves and inflorescences of Lavandula×allardii.Predicted values of essential oil content have been 1.387/3.05 mL/g,4.21/4.18 h drying time and 0.809/0.732 kWh energy consumption at the optimum operation point for leaves and inflorescences,respectively.The resulted optimized non-stationary temperature scheme considerably improved the drying kinetics and the process consump

关 键 词：Convective drying Non-isothermal drying LAVENDER Essential oil Process optimization 

分 类 号：S18[农业科学—农业基础科学]