Citation
Gan K. S. Forest Research Institute of Malaysia, . and Zairul Amin R., . and Lim S. C., . and Sim H. C., . (2009) Is RF-vacuum timber drying an option now. [Proceedings Paper]
Abstract
Radio-frequency-vacuum RF drying is an expensive system but with the current high timber prices this may be an affordable alternative drying process if the dried-timber quality is good for specialized applications. The advantages of employing dielectric heating are rapid and fairly uniform heat transfer often to solidly stacked timbers very high drying rates and less drying defects such as case-hardening and oxidative discoloration of the wood. In this study 30 x 120 mm kekatong Cynometra spp. was RFdried from 34.1 to 12.9 MC in less than 7 days; on the other hand it took about 14 days to dry the timber from 33.8 to 10.3 in the conventional steam-heated kiln-drying system KD. The drying time of kekatong using RF system may be further reduced by increasing the input current to the generator and/or vacuum. Generally the drying quality of kekatong by RF system was comparable with that of KD with low shrinkage values.
Download File
Full text available from:
|
Abstract
Radio-frequency-vacuum RF drying is an expensive system but with the current high timber prices this may be an affordable alternative drying process if the dried-timber quality is good for specialized applications. The advantages of employing dielectric heating are rapid and fairly uniform heat transfer often to solidly stacked timbers very high drying rates and less drying defects such as case-hardening and oxidative discoloration of the wood. In this study 30 x 120 mm kekatong Cynometra spp. was RFdried from 34.1 to 12.9 MC in less than 7 days; on the other hand it took about 14 days to dry the timber from 33.8 to 10.3 in the conventional steam-heated kiln-drying system KD. The drying time of kekatong using RF system may be further reduced by increasing the input current to the generator and/or vacuum. Generally the drying quality of kekatong by RF system was comparable with that of KD with low shrinkage values.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | 4 tables |
| AGROVOC Term: | Radio frequency |
| AGROVOC Term: | Timber - Drying |
| AGROVOC Term: | Conventional use |
| AGROVOC Term: | Steam treatment |
| AGROVOC Term: | Heating |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/11441 |
Actions (login required)
 |
View Item |
