The results from process simulation using the developed 2-D FEM heat and mass
transfer model, Paper VIII, give a convincing correspondence between the
theoretical approaches used in the model and the experiment. The simulated core
temperature values as well as the mc values agree well with the measured ones. In
the experiments, the maximum input power was chosen to keep the wood
temperature below 110qC. This temperature limit is based on earlier experiences
in which fast heating above this limit often causes too high internal vapour
pressure, which gives rise to internal cracks. These cracks seem to arise where the
ray cells are situated in the wood structure. Figure 18 shows an exaggerated result
of uncontrolled microwave drying.