The Heat and Mass Transfer Characteristics of Boiling Point Drying Using Radio Frequency and Microwave Electromagnetic Fields

摘要

The first part of the memorandum discusses the general features of drying: a classification of solids is given and it is shown how the solutions of the heat and mass transfer equations provide criteria which determine the drying characteristics of conventional dryers. In the remainder of the memorandum, a heat and mass transfer model for boiling point dielectric drying is developed. The characteristics of the drying are obtained from the solutions to the heat and mass transfer equations. Criteria which describe the drying process are found and interpreted. A procedure for estimating the performance of a dryer operating under the conditions of the model is suggested. Finally the conditions used in the idealized model of the wet solid are compared with 'real' solids.