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31 records – page 1 of 4.

Drying of balsam and subalpine fir: for a better understanding

https://library.fpinnovations.ca/en/permalink/fpipub52906
Author
Lavoie, Vincent
Date
November 2019
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Date
November 2019
Material Type
Research report
Physical Description
4 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Air drying
Balsam
Drying
Fir
Logs
Lumber
Moisture content
Performance
Sawmills
Subalpine fir
Wet pockets
Wood yards
Series Number
FPI WP 2019
Language
English
Abstract
The findings of recent studies from both eastern and western Canada have shown that the drying behaviour of subalpine fir (A. lasiocarpa) and balsam fir (A. balsamea) is similar, which allows common solutions to be applied based on research conducted on one species of fir or the other. This article summarizes previous research findings and good practices that can be adopted in the short term to improve the drying of fir.
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Drying performance of 4/4-inch red oak in superheated steam/vacuum and conventional kilns : a comparative study

https://library.fpinnovations.ca/en/permalink/fpipub42146
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Physical Description
26 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Vacuum drying
Vacuum
Superheated steam
Steam
Drying
Series Number
Canadian Forest Service
Project No. 2293B
Location
Sainte-Foy, Québec
Language
English
Abstract
The objective of this project was to provide the information required by Canadian lumber producers to evaluate the superheated steam/vacuum (SS/V) drying process by comparison with conventional methods as applied to 4/4-inch red oak with respect to drying time, final product quality, efficiency and costs. The study was divided into two parts. In the first part, three loads of red oak were dried in Forintek’s eastern SS/V kiln to identify a suitable schedule with respect to time and quality. In the second part, comparative tests were conducted between the SS/V kiln and a conventional kiln of similar capacity. The tests involved measurements of drying time as well as wood quality before and after the drying operation, including distortion, drying checks and splits, final moisture content (MC) gradient, shrinkage, and residual stress (prong test). Energy consumption was also measured for the SS/V and conventional kilns. Finally, drying costs were evaluated for the two systems in an industrial scenario. We successfully developed a schedule to efficiently dry 4/4-inch red oak through the SS/V process. With this schedule, 4/4-inch red oak can be dried in approximately a third of the time required for a similar load in the conventional kiln. Our results from parallel measurements indicate that the final quality of the wood dried with the SS/V process is quite comparable to that obtained with conventional drying. In addition, quality results proved achievable without a conditioning phase at the end of the cycle. Parallel drying tests conducted on similar loads of 4/4 red oak indicated that total energy consumption was 15% lower with the SS/V kiln than with the conventional kiln. A comparison of drying costs for the two systems based on annual production of 10 million fbm suggested that capital and operating costs might be slightly lower with the SS/V kiln.
Red oak
Superheated Steam Drying
Vacuum Drying
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Drying performance of 8/4-inch hard maple in superheated steam/vacuum and conventional kilns : a comparative study

https://library.fpinnovations.ca/en/permalink/fpipub42147
Author
Lavoie, Vincent
Savard, Marc
Tremblay, Carl
Date
March 2001
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Savard, Marc
Tremblay, Carl
Date
March 2001
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Vacuum drying
Vacuum
Superheated steam
Steam
Drying
Series Number
Canadian Forest Service
Project No. 2293B
Location
Sainte-Foy, Québec
Language
English
Abstract
The objective of this project was to provide the information required by Canadian lumber producers to evaluate the superheated steam/vacuum (SS/V) drying process as applied to 8/4-inch red oak with respect to productivity, final product quality, efficiency and energy consumption. Another objective was to compare SS/V drying with conventional drying in terms of productivity and wood quality. Two homogeneous test loads were prepared from a single lumber lot for the SS/V and conventional tests. Initial lumber moisture content in the two loads averaged 28%. The tests involved measuring drying time as well as wood quality before and after the drying operation, including: distortion, drying checks and splits, final moisture content gradient, dimensional shrinkage, and residual stresses (prong tests). In addition, the tests included measurements of energy consumption, both thermal and electrical, with meters. The schedule used for conventional drying was drawn from Boone et al. (1993) and that for SS/V drying was supplied by Iwotech, the equipment manufacturer. In both cases, the drying cycle was terminated when the all boards used for control had reached the 7 ± 1.5% moisture content range. Drying was achieved in 7.6 days with the SS/V process, representing a significant reduction (by a factor of 2.2) relative to the time required with the conventional method; and wood quality after drying was comparable. The results obtained with respect to distortion, checking, moisture content gradients, and residual stresses attest to the quality of the drying operation with both processes. Total energy consumption for the SS/V process was 11,307 kJ/kg of evaporated water with 58% as thermal energy and 42% as electrical energy.
Sugar maple
Superheated Steam Drying
Vacuum Drying
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Drying performance of 8/4-inch red oak in a superheated steam/vacuum kiln

https://library.fpinnovations.ca/en/permalink/fpipub42148
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Vacuum drying
Vacuum
Superheated steam
Steam
Drying
Series Number
Canadian Forest Service
Project No. 2293B
Location
Sainte-Foy, Québec
Language
English
Abstract
The objective of this project is to provide the information required by Canadian lumber producers to evaluate the superheated steam/vacuum (SS/V) drying technology as applied to 8/4-inch red oak with respect to drying time, final wood quality, and energy consumption. Two loads of red oak were dried in Forintek’s eastern SS/V kiln with the objective of identifying a suitable schedule with respect to time and quality. The tests involved measurements of drying time as well as wood quality before and after the drying operation, including distortion, drying checks and splits, final moisture content gradient, shrinkage and residual stress (prong test). Energy consumption of the SS/V kiln was also measured. We were able to develop a schedule to efficiently dry 8/4-inch red oak through the SS/V process. With this schedule, an industrial load of 8/4-inch red oak can be dried in a quarter of the time typically required in conventional kilns. Our results indicate that quality drying is achievable with the SS/V process if the set point temperature is kept relatively low and the relative humidity relatively high while the wood is above the fibre saturation point. 8/4-inch red oak dried by the SS/V process required no conditioning phase to equalize moisture contents at the end of the cycle. Energy consumption measurements indicate that the process used more electrical energy than thermal energy, this being due to the relatively long time required to dry 8/4-inch red oak.
Red oak
Superheated Steam Drying
Vacuum Drying
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Drying performance of 8/4-inch white oak in a superheated steam/vacuum kiln

https://library.fpinnovations.ca/en/permalink/fpipub42149
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Tremblay, Carl
Lavoie, Vincent
Savard, Marc
Date
March 2001
Material Type
Research report
Physical Description
12 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Vacuum drying
Vacuum
Superheated steam
Steam
Drying
Series Number
Canadian Forest Service
Project No. 2293B
Location
Sainte-Foy, Québec
Language
English
Abstract
The objective of this project was to provide the information required by Canadian lumber producers to evaluate the superheated-steam/vacuum (SS/V) drying technology as applied to 8/4-inch white oak with respect to productivity, wood quality, and energy consumption. A drying test was conducted on a load consisting mostly of lumber in the Select&Better grade. Initial board moisture contents averaged 53.1%. The tests involved measurements of drying time as well as wood quality before and after the drying operation, including: distortion, drying checks and splits, final moisture content gradient, dimensional shrinkage, and residual stresses (prong tests). In addition, the tests included measurements of energy consumption, both thermal and electrical, with meters. A schedule that had been used successfully in SS/V drying tests with 8/4-inch red oak was used for this test. A total of 21.6 days was required to reduce the lumber moisture content from 53% to 16%. In fact, this result underestimated actual drying time due to the cycle being interrupted prematurely and to relative humidity in the kiln at the beginning of the cycle being lower than set. As a result, a significant increase in surface and internal drying checks was observed. Relative humidity lower than the set point at the beginning of the cycle may account for such checking. The average final moisture content gradient of 12.3% was attributed to the cycle being interrupted when overage moisture content was still higher than target. Prong tests showed no indication of significant residual stresses, even though no conditioning had been performed. Total energy consumption was 18,602 kJ/kg of evaporated water with 48% as thermal energy and 52% as electrical energy.
White oak
Superheated Steam Drying
Vacuum Drying
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Author
Lavoie, Vincent
Date
November 2006
Material Type
Pamphlet
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Date
November 2006
Material Type
Pamphlet
Physical Description
4 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Seasoning
Series Number
Technology Profile ; TP-06-01E
E-4170
Location
Québec, Québec
Language
English
Abstract
Seasoning - Vacuum drying
Drying
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Développement d'une technologie de séchage par haute fréquence en continu pour améliorer la fabrication de produits à valeur ajoutée

https://library.fpinnovations.ca/en/permalink/fpipub39873
Author
Lavoie, Vincent
Date
2014
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Date
2014
Material Type
Research report
Physical Description
13 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Kilns
Seasoning high frequency
Series Number
301007951
E-4896
Location
Québec, Québec
Language
French
Abstract
CONTINUOUS PROCESS
HIGH FREQUENCIES
KILNS
DRYING
Abstract
Ce projet consiste à faire la démonstration à l’échelle semi-industrielle d’un procédé de séchage de précision par haute fréquence en continu développé pour améliorer la qualité des produits séchés à la fin de la première ou au début de la deuxième transformation du bois. Plus spécifiquement, les objectifs du projet sont de : Ø Concevoir, fabriquer et démontrer le fonctionnement d’un séchoir par haute fréquence en continu à l’échelle préindustrielle qui peut être intégré dans les usines de rabotage ou à l’entrée des usines de deuxième transformation; Ø Transférer la technologie à un intégrateur devenant le fournisseur de l’équipement pour l’industrie canadienne de la transformation du bois.
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Développement d'un prototype industriel de reséchage par haute fréquence en continu

https://library.fpinnovations.ca/en/permalink/fpipub5818
Author
Lavoie, Vincent
Tanguay, F.
Kendall, J.
Date
April 2016
Edition
40274
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Tanguay, F.
Kendall, J.
Date
April 2016
Edition
40274
Material Type
Research report
Physical Description
23 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Kilns
Seasoning high frequency
Series Number
E-4981
Location
Québec, Québec
Language
French
Abstract
La technologie de séchage par haute fréquence en continu développée par FPInnovations et Hydro-Québec a récemment été démontrée à l’échelle semi-industrielle (précommerciale) (Lavoie et al. 2015). Les essais de séchage ont porté principalement sur des applications de produits à valeur ajoutée. La technologie est viable techniquement et peut répondre à des besoins de séchage de précision pour des applications spécifiques. La technologie a également le potentiel de resécher des pièces demeurées humides (volontairement ou involontairement) lors de la production de bois d’œuvre.
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Element 5 : Application of rapid drying technologies to streamline the lumber manufacturing process - Applying rapid drying technologies to Canadian SPF lumber

https://library.fpinnovations.ca/en/permalink/fpipub5736
Author
Garrahan, Peter A.
Lavoie, Vincent
Elustondo, D.
Date
March 2011
Edition
39357
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Lavoie, Vincent
Elustondo, D.
Date
March 2011
Edition
39357
Material Type
Research report
Physical Description
41 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Pinus
Spruce
Spruce Pine Fir
SPF
Softwoods
Drying
Canada
Series Number
Transformative Technologies Program ; Project TT.5.12
201002819
Location
Québec, Québec
Language
English
Abstract
Spruce Pine Fir (SPF)
Softwoods - Canada
Lumber - Drying
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Essai d'un humidimètre NIR pour mesurer la teneur en humidité de bois feuillu

https://library.fpinnovations.ca/en/permalink/fpipub5777
Author
Lavoie, Vincent
Lejeune, Claude
Tanguay, F.
Dupont, Danick
Ding, Feng
Date
March 2013
Edition
39752
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Lejeune, Claude
Tanguay, F.
Dupont, Danick
Ding, Feng
Contributor
CRIQ
Date
March 2013
Edition
39752
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Moisture content
Hardwoods
Location
Québec, Québec
Language
French
Abstract
Le mandat du projet consiste en la réalisation d’essais avec un équipement d’acquisition générique NIR (Near Infrared) dans le but de développer des modèles mathématiques pouvant être utilisés pour déterminer le taux d’humidité des planches de bois franc pour quatre essences : le chêne rouge, l’érable à sucre, le merisier et l’érable argenté. Une fois les modèles développés les objectifs plus spécifiques sont d’évaluer le niveau de précision de mesure de la teneur en humidité sur du bois parfaitement équilibré ainsi que déterminer les impacts sur les lectures provenant des facteurs suivants : l’essence, la densité, la qualité de surface, la température du bois, le gradient de teneur en humidité ainsi que la vitesse de passage des planches. Finalement, des essais doivent être réalisés sur du bois provenant directement de l’industrie et n’ayant subi aucun traitement d’équilibrage en laboratoire pour connaître le niveau de précision de lecture dans ces conditions.
MOISTURE METERS
HARDWOODS
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31 records – page 1 of 4.