A brief description of Moisture Content Gradients:
The difference between moisture content inside a board of wood and the moisture content on the board surface creates the driving force during drying. It is the object of a correct drying process to adjust this wood moisture content gradient so that the drying process proceeds at an optimum. It is disadvantageous if the wood moisture content gradient is too great, since the moisture content flowing from the inside of the board to the surface is disturbed. Case hardening is the result. If the moisture content gradient is too small during drying, then the resulting drying times are uneconomical. The fully automatic dynamic FC Controller controls the climate inside the kiln so that an optimum wood moisture content gradient is present.