Abstract
The bark losses due to unwanted debarking in mechanised
cuttings are estimated to correspond to 2 TWh of energy.
Therefore actions to decrease peeling and reroute bark to
energy production is important. In addition, peeling of
bark causes damages to the surface layers of industrial
roundwood lowering therefore its added value. Bark's
peeling is at its highest during the sap season when it
is approximately three times higher compared to the rest
of the year. This projects aim is to decrease the level
of bark's peeling in cutting done by a single grip
harvester significantly. To achieve this goal, the level
of bark's peeling and its characteristics were determined
in different season. Also mechanics of delimbing knives
knot-cutting process were studied. It was found that
lowering of delimbing knives' pressure to one third of
its normal values reduced the unwanted debarking most
significantly. Also decrease in feeding rolls' pressure
had a similar effect.
| Translated title of the contribution | Control of bark losses in single grip harvester cutting |
|---|---|
| Original language | Finnish |
| Title of host publication | Puuenergian teknologiaohjelman vuosikirja 2003 |
| Subtitle of host publication | Puuenergian teknologiaohjelman vuosiseminaari |
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Pages | 167-183 |
| ISBN (Electronic) | 951-38-6288-7 |
| ISBN (Print) | 951-38-6287-9 |
| Publication status | Published - 2004 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | Puuenergian teknologiaohjelman vuosiseminaari - Jyväskylä, Finland Duration: 17 Mar 2004 → 18 Mar 2004 |
Seminar
| Seminar | Puuenergian teknologiaohjelman vuosiseminaari |
|---|---|
| Country/Territory | Finland |
| City | Jyväskylä |
| Period | 17/03/04 → 18/03/04 |