Heat and Mass Transfer in Microwave Processing

摘要: Publisher Summary This chapter focuses on the heat and mass transfer in microwave processing. The characteristics of processing systems are considerable interest for materials development process engineering. ability radiation to penetrate couple with provides an attractive means obtaining controlled precise heating. Microwave appliances have three major components—a generator, a waveguide, applicator. It is important appreciate role each component understand how ovens operate. Electrical properties dictate nature microwave-material interactions. Metals (electrical conductors) excellent reflectors not, general, heated significantly by microwaves. Electromagnetic field intensity distribution prime factors that determine absorption. unique character heating can be understood only appreciating electromagnetic propagates absorbed materials. During porous materials, temperature gradients internal evaporation promote transport mobile components (liquids gases). As compared conventional surface heating, microwaves generally provide faster, selective, more uniform Microwaves offer many potential benefits materials—time energy savings, improved product quality, better control, new applications.