Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Microwave treatment of wood
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-5869-2236
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Drying wood using microwave energy is not very common, but could be a complement to conventional air-circulation drying due to the possibility to dry wood faster than the conventional drying methods with preserved quality. Furthermore, this technique could be used to condition boards with too high moisture content gradient. In this study, an industrial-scale, online microwave drier for wood components has been used and adapted to wood treatment. The aim of the present work was to investigate if the microwave drying method itself affects such wood properties as bending strength, hardness and colour change. Another aim was to explain, with finite element model simulations, the interaction between microwaves and wood during heating and drying and to a lesser extent also during microwave scanning of wood. Tests of the mechanical properties of wood showed no difference in bending strength in comparison with the conventional air circulation method. Nor was there any significant difference in wood hardness (Janka) perpendicular to the grain between the drying methods or between different temperature levels during the microwave drying. However, the results showed that there is a significant difference in wood hardness parallel to the grain between the methods when drying progressed to relatively lower levels of moisture content; i.e. wood hardness becomes higher during microwave drying. The developed multiphysics finite element model is a powerful evaluation tool for understanding the interaction between wood and microwaves during heating and drying as well as scanning. The model can be used for simulation of different microwave treatments of wood.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2007. , 41 p.
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2007:40
National Category
Bio Materials
Research subject
Wood Physics
Identifiers
URN: urn:nbn:se:ltu:diva-26364Local ID: de7a0a10-7aed-11dc-a72d-000ea68e967bOAI: oai:DiVA.org:ltu-26364DiVA: diva2:999526
Note
Godkänd; 2007; 20071015 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-24Bibliographically approved

Open Access in DiVA

fulltext(3594 kB)317 downloads
File information
File name FULLTEXT01.pdfFile size 3594 kBChecksum SHA-512
8392b6ce81de24cddb7c246ff28e17eb2ce6441c8922e4ec179c8509c48d64340fc6fd3a4b05ff8b52244f3ac64ffe08c04a960790d453adc677ce8cad2398ea
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Hansson, Lars
By organisation
Wood Science and Engineering
Bio Materials

Search outside of DiVA

GoogleGoogle Scholar
Total: 317 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 115 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf