Design of an experimental drying system and investigation of operating parameters [Deneysel bi̇r kurutma si̇stemi̇ tasarimi ve çalişma parametreleri̇ni̇n i̇ncelenmesi̇]

In this study,a dryer which can be dry the timbers with vacuum drying method has been designed. working in ideal conditions of the vacuum drying kiln with plc automation system has been provided. software for automation system has been developed. different experiments according to the drying temperatures,the operating pressures and the waiting times in vacuum have been carried out. the timbers that average relative humidity is 45% have been dried until the relative humidity dropped to 8%. drying time of the each experiment has been realized between 40 ∼ 50 hours. consequently,optimum operating conditions to dry the pine timbers by vacuum method have been identified that the drying temperature is 50 °c,the working pressure is 0,80 bar and the waiting time in vacuum is 10 minutes (0,25 bar). © 2012 tibtd printed in turkey.