EFFECT OF DIFFERENT LEVELS OF TEMPERATURE, PRESSURE AND DRYING PERIOD ON PERCENTAGE OF DRYING RATE AND SHRINKAGE DURING DRYING OF EUCALYPTUS WOOD | ||
| AL-TAQANI | ||
| Article 1, Volume 25, Issue 4, December 2012, Pages 0-0 | ||
| Abstract | ||
| The effect of three temperature levels (80, 100, 120 ْC), three pressure levels (zero, 17.6, 35.2 kg/cm2) for two thickness boards (1 and ½ inch) of Eucalyptus camaldulensis dehn. on drying rate percent, thickness and width shrinkage percent have been studied. Also, nine drying periods, 10 minutes/period for 1 inch thick board and 5 minutes/period for ½ inch thick board were included. Results indicated that there were significant increase in drying rate percent, thickness and width shrinkage percent by increasing temperature and pressure for both board thickness. While drying rate percent decreased significantly by increasing drying periods for both board thickness. Thickness and width shrinkage percent increased significantly by increasing drying periods. It can be concluded that the best temperature which can increase drying rate percent, shrinkage percent of board thickness and width is 100 ْC, Since 120 ْC may causes undesirable wood defects. Also, using 100 ْC is better economically than 120 ْC. 35.2 Kg/cm2 pressure give the best results in increasing drying rate and shrinkage percent for thickness and width of the boards specially 1 Inch thick boards | ||
|
Statistics Article View: 33 PDF Download: 14 |
||