Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach

Antti Hanhijärvi (Corresponding Author), A. Hukka, T. Paajanen, P. Pulkkinen, S. Sundman

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The paper presents experimental results of jet drying tests of birch (Betula pendula) and spruce (Picea abies) veneers at temperatures of 140°C and 190°C. Results include drying rates for 1.5 mm thick birch veneers as well as 1.5 mm and 2.6 mm thick spruce veneers of both heartwood and sapwood. Based on the test results, material parameter values for a simplified drying model are assessed. The model is based on the use of an effective diffusion coefficient and an effective surface emission coefficient, which values are calibrated to fit to the experimental results. It is observed, that separate model parameter sets are needed for the two different species but also for occurrence of heartwood or sapwood (spruce) and different thickness values of veneers.
Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalHolz als Roh- und Werkstoff
Volume61
Issue number2
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

Veneers
Betula
Picea
Drying
drying
heartwood
sapwood
modeling
Betula pendula
diffusivity
Picea abies
testing
temperature
test
parameter
Temperature

Keywords

  • jet drying
  • drying
  • veneers
  • birch
  • spruce
  • heartwood
  • sapwood

Cite this

Hanhijärvi, Antti ; Hukka, A. ; Paajanen, T. ; Pulkkinen, P. ; Sundman, S. / Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach. In: Holz als Roh- und Werkstoff. 2003 ; Vol. 61, No. 2. pp. 83-88.
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Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach. / Hanhijärvi, Antti (Corresponding Author); Hukka, A.; Paajanen, T.; Pulkkinen, P.; Sundman, S.

In: Holz als Roh- und Werkstoff, Vol. 61, No. 2, 2003, p. 83-88.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach

AU - Hanhijärvi, Antti

AU - Hukka, A.

AU - Paajanen, T.

AU - Pulkkinen, P.

AU - Sundman, S.

PY - 2003

Y1 - 2003

N2 - The paper presents experimental results of jet drying tests of birch (Betula pendula) and spruce (Picea abies) veneers at temperatures of 140°C and 190°C. Results include drying rates for 1.5 mm thick birch veneers as well as 1.5 mm and 2.6 mm thick spruce veneers of both heartwood and sapwood. Based on the test results, material parameter values for a simplified drying model are assessed. The model is based on the use of an effective diffusion coefficient and an effective surface emission coefficient, which values are calibrated to fit to the experimental results. It is observed, that separate model parameter sets are needed for the two different species but also for occurrence of heartwood or sapwood (spruce) and different thickness values of veneers.

AB - The paper presents experimental results of jet drying tests of birch (Betula pendula) and spruce (Picea abies) veneers at temperatures of 140°C and 190°C. Results include drying rates for 1.5 mm thick birch veneers as well as 1.5 mm and 2.6 mm thick spruce veneers of both heartwood and sapwood. Based on the test results, material parameter values for a simplified drying model are assessed. The model is based on the use of an effective diffusion coefficient and an effective surface emission coefficient, which values are calibrated to fit to the experimental results. It is observed, that separate model parameter sets are needed for the two different species but also for occurrence of heartwood or sapwood (spruce) and different thickness values of veneers.

KW - jet drying

KW - drying

KW - veneers

KW - birch

KW - spruce

KW - heartwood

KW - sapwood

U2 - 10.1007/s00107-003-0379-4

DO - 10.1007/s00107-003-0379-4

M3 - Article

VL - 61

SP - 83

EP - 88

JO - European Journal of Wood and Wood Products

JF - European Journal of Wood and Wood Products

SN - 0018-3768

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ER -