Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (263 KB bytes)

Title: Fiber Recovery with Chain Flail Delimbing/Debarking and Chipping of Hybrid Poplar

Author: Hartsough, Bruce; Spinelli, Raffaele; Pottle, Steve; Klepac, John;

Date: 2000

Source: Journal of Forest Engineering Vol. 11, No. 2, July 2000

Publication Series: Miscellaneous Publication

Description: This study determined how much wood was potentially available From short rotation hybrid poplar, and how mtich was actually recovered when trees were delimbed and debarked with chain flails and chipped. 3 1 groups of five trees each were measured and then processed. For trees larger than 50 kg total dry weight, potentially recoverable wood averaged 75% oftotal weight. Over 95% of this wood was converted into chips. Losses due to breakage by the flails, which show up in the bark discharge, amounted to 0.8 dry kg per tree and were relatively independent of tree size. Chipper reject wood losses averaged 2.3 dry kg per tree, but increased in almost direct proportion to tree size, from 1.2 kg for 50 kg trees, to 3.2 kg for 120 kg trees. For trees less than 50 kg total dry weight, potentially recoverable wood fraction was highly variable - from 50 to 75% of total weight. Because of breakage of small stems by the flail, wood recovery was also relatively low, ranging from 40 to 95%. Most of the wood loss for smaller trees showed up in the bark discharge rather than as chipper rejects. For larger trees, the chipper rejects represent the biggest opportunity for improving the recovery of wood fiber. Sharp chipper knives appear to be important for minimizing losses. Beyond that, it is not clear whether wood in the chipper rejects is the result of bole damage by the flail or chipper design characteristics.

Keywords: Short rotation forestry, wood losses, processing

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Hartsough, Bruce; Spinelli, Raffaele; Pottle, Steve; Klepac, John 2000. Fiber Recovery with Chain Flail Delimbing/Debarking and Chipping of Hybrid Poplar. Journal of Forest Engineering Vol. 11, No. 2, July 2000

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.