Radio-frequency drying of non-metallic materials

Hot air drying suffers from two serious drawbacks. On the one hand it is very non-uniform even under well-controlled conditions, on the other, the rate falls of sharply towards the end of the drying period. Often the net result is a product which is unevenly dried at poor energy efficiecny. Radio-frequency power can remedy both of these shortcomings. The advantages of radio-frequency power in drying from the point of view of product quality and power costs are illustrated by reference to results obtained when drying paper and wool.