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

Antti Hanhijärvi; A. Hukka; T. Paajanen; P. Pulkkinen; S. Sundman

doi:10.1007/s00107-003-0379-4

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

VTT Technical Research Centre of Finland

Research output: Contribution to journal › Article › Scientific › peer-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 language	English
Pages (from-to)	83-88
Journal	Holz als Roh- und Werkstoff
Volume	61
Issue number	2
DOIs	https://doi.org/10.1007/s00107-003-0379-4
Publication status	Published - 2003
MoE publication type	A1 Journal article-refereed

Keywords

jet drying
drying
veneers
birch
spruce
heartwood
sapwood

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title = "Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach",

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.",

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author = "Antti Hanhij{\"a}rvi and A. Hukka and T. Paajanen and P. Pulkkinen and S. Sundman",

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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

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JO - European Journal of Wood and Wood Products

JF - European Journal of Wood and Wood Products

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