Drying Kinetics and Energy Consumption in Vacuum Drying Process with Microwave and Radiant Heating  

作　　者：M.Kamel J.I.Lombrana C.de Elvira R.Rodríguez 

机构地区：[1]Department of Chemical Engineering Facultad de Ciencias, Universidad del Pais Vasco. Apdo. 644, 48080 Bilbao, Spain,Department of Chemical Engineering Facultad de Ciencias, Universidad del Pais Vasco. Apdo. 644, 48080 Bilbao, Spain,Instituto del Frio (CSIC) Ciudad Universitaria. 28040 Madrid Spain,Department of Chemical Engineering Facultad de Ciencias, Universidad del Pais Vasco. Apdo. 644, 48080 Bilbao, Spain

出　　处：《Chinese Journal of Chemical Engineering》2004年第6期809-813,共5页中国化学工程学报（英文版）

摘　　要：The general objective of this work is to analyze energy input in a vacuum process with the incorporation of microwave heating. Thus, necessary criteria for designing an efficient freeze-drying operation are considered through the analysis of strategies based on the combination of different intensities of radiant and microwave heating.The other aim of this research topic is to study the kinetics of drying in relation to mass transfer parameters.Five freeze-drying strategies using both heating systems were used. Consequently, energy input could be related to diffusivity coefficients, temperature and pressure profiles during dehydration of the product and analyzed in comparison to a conventional freeze-drying process.The general objective of this work is to analyze energy input in a vacuumprocess with the incorporation of microwave heating. Thus, necessary criteria for designing anefficient freeze-drying operation are considered through the analysis of strategies based on thecombination of different intensities of radiant and microwave heating. The other aim of thisresearch topic is to study the kinetics of drying in relation to mass transfer parameters. Fivefreeze-drying strategies using both heating systems were used. Consequently, energy input could berelated to diffusivity coefficients, temperature and pressure profiles during dehydration of theproduct and analyzed in comparison to a conventional freeze-drying process.

关 键 词：vacuum microwave drying diffusivity constant ENERGY 

分 类 号：TQ05[化学工程]