微波及辐射真空干燥过程中的干燥动力学及能量消耗

• 来源期刊: 中国化学工程学报（英文版）
• 学科: 工学
• 关键词: vacuum microwave drying diffusivity constant energy
• 年，卷（期）: 2004,（6）
• 页码范围: 809-813
• 页数: 5页
• 分类号: TQ0
• 语种: 英文

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.