Timber Drying in Pre-dryer with Air Solar Collector

In this study, drying kiln which has solar air collector was designed and manufactured in order to form a predrying for classical type steamy timber drying kilns. The energy economy is provided by diminishing the running time of the classical type steamy drying kilns with throwing free moisture in timber. In the drying system, the poplar timber's dry basis moisture content was reduced from 80% g water/g dry matter to 20% at 13 hours. In the same system, the pine timber's dry basis moisture content was reduced from 110% g water/g dry matter to 20% at 19 hours.