Study on Wood Drying Using High Voltage Electric Discharge Method,Conduction Method and the Union Method
Hongda Li, Yang Kang · China Forest Products Industry · 2009
High voltage electric discharge method allows providing volume heating of wood.By means of this way it is possible to receive uniform distribution of temperature and humidity on the whole volume of wood and obtain high quality dried wood in a short time.However,high voltage electric discharge method consumes more electric energy and costs much.Conduction method can use heat energy produced from waste wood combustion and save drying cost.As the directions of pressure gradient and temperature gradient are opposite during the high voltage electric discharge process and conduction drying process,so,in the union method combining high voltage discharge method with conduction method,their mutual offset and compensation can be realized, which can lower pressure gradient along the cross-section of wood and obtain high quality dried wood. Therefore,high voltage electric discharge method,conduction method and the union method for wood drying were used in experimental study for comparison.Experiment study shows that using the union method combining high voltage electric discharge with conduction can reduce energy consumption cost of drying and obtain high quality wood in shorter drying time.