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156 records – page 1 of 16.

Accelerated drying of British Columbia framing lumber

https://library.fpinnovations.ca/en/permalink/fpipub779
Author
Mackay, J.F.Graham
Date
April 1984
Edition
37108
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mackay, J.F.Graham
Contributor
Science Council of British Columbia.
Date
April 1984
Edition
37108
Material Type
Research report
Physical Description
13 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Steam
Seasoning steam
Seasoning high temperature
Seasoning
Drying
High temperature
Series Number
W-327
Location
Vancouver, British Columbia
Language
English
Abstract
Seasoning - Steam
Seasoning - High temperature drying
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Analyse des niveaux de declassement cause par le sechage des sciages de dimensions specifiees d'epinette-pin-sapin

https://library.fpinnovations.ca/en/permalink/fpipub2304
Author
Garrahan, Peter A.
Cane, D.A.
Date
April 1988
Edition
38858
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Cane, D.A.
Date
April 1988
Edition
38858
Material Type
Research report
Physical Description
33 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Pinus
Spruce
Spruce Pine Fir
SPF
Seasoning degrade
Seasoning
Drying
Series Number
E-2934
Location
Ottawa, Ontario
Language
French
Abstract
Seasoning - Degrade
Spruce-Pine-Fir (SPF) - Drying
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Analysis of degrade levels in drying eastern spruce-pine-fir dimension lumber

https://library.fpinnovations.ca/en/permalink/fpipub1786
Author
Garrahan, Peter A.
Cane, D.A.
Date
April 1988
Edition
38303
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Cane, D.A.
Date
April 1988
Edition
38303
Material Type
Research report
Physical Description
32 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Pinus
Spruce
Spruce Pine Fir
SPF
Seasoning degrade
Seasoning
Drying
Series Number
3743K411
E-995
Location
Ottawa, Ontario
Language
English
Abstract
Seasoning - Degrade
Spruce-Pine-Fir (SPF) - Drying
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An evaluation of wood kiln control practices

https://library.fpinnovations.ca/en/permalink/fpipub5687
Author
Léger, Francine
Amazouz, M.
Date
April 2003
Edition
38907
Material Type
Research report
Field
Wood Manufacturing & Digitalization
. iv v Summary This report analyses softwood-drying practices in Canada and identifies
Author
Léger, Francine
Amazouz, M.
Contributor
Natural Resources Canada
Date
April 2003
Edition
38907
Material Type
Research report
Physical Description
68 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Drying
Canada
Kilns
Location
Ottawa, Ontario
Language
English
Abstract
This report analyses softwood-drying practices in Canada and identifies the R&D efforts required in this field. These issues need to be examined in order to address environmental concerns and implement solutions that will improve energy efficiency and reduce greenhouse gas emissions. Developing advanced softwood-drying control systems would reduce energy use and enhance product quality. According to some researchers, the potential reduction in energy use by kilns in Canada would be 5.5 PJ per year, or 335 kT per year in carbon dioxide (CO2) emissions. Furthermore, it is estimated that CO2 emissions could be reduced by an additionnal 90 kT per year through a decrease in the amount of lumber that is downgraded. This study aims to give an overview of the main trends in developing control systems and to identify barriers to their introduction. It will also serve as a starting point for launching and directing projects on control procedures for lumber-drying in cooperation with the industry, universities, private and public laboratories, manufacturers and users. In keeping with this objective, researchers for this study surveyed members of the Quebec Lumber Manufacturers' Association and a few mills in British Columbia. The main findings are as follows: - Industry opinion is that its facilities are sufficiently modern to meet current market needs. - Industry opinion is that quality (grade reduction / rejection rate) is the most significant factor when evaluationg drying systems. - Because it is not easy to measure the quality of the drying process, drying time is the most often used to evaluate drying performance. - Although quality was identified as the main variable in the drying process, the proportion of under-dried and over-dried lumber units was 9 and 16 percent, respectively. - Operators play a significant role in drying operations (they manage the process before, during and after drying), and their actions affect the results of the process considerably. - The decision to purchase a drying-control system is driven more by the acquisition of a kiln than by requirements related to the process itself. The researchers reviewed current technical knowledge of the main dry kiln control systems by considering two types of controls : air temperature control when drying ; and setting up drying programs. The figures in this report illustrate the use of these two approaches along with various other control methods employed in the industry. There are five softwood kiln controller manufacturers in Canada, which together account for 75 percent of the Canadian market. Although they use similar controllers, there are differences in how drying programs are set up and how changes in moisture content are measured during drying. In spite of recent technological advances, proper drying operations still depend on operator expertise. R&D on new measurements instruments and mathematical models has not resulted in advanced kiln controllers so far. Innovation in this area has not kept pace with the advances in other leadings sectors. One technical problem that has not been resolved is that of measuring moisture content. In spite of more than 20 years of effort, mathematical models are still being developed in the scientific community, and few applications resulting from this work have benefited the industry other than those supporting operator training. The research community and the industry acknowledge that the development of an advanced controller represents a promising avenue for improving the lumber-drying process. Unfortunately, problems in modelling the drying process and measuring moisture content remain represent major obstacles to the development of high-efficiency controllers. Another obstacle relates to the difficulty of evaluating the financial benefits that would accrue from potential advances with the necessary speed and accuracy. These, then, are the key factors hindering the introduction of new drying technologies. They also explain why length of drying time is still the most frequently used control variable, despite the fact that the industry considers finished product quality more important. Furthermore, it appears that operators' actions significantly affect what happens not only in the kiln but at all stages in the process, from sawmill to shipping. In view of this, we believe that a system for monitoring the entire drying process is worth investigating. Such a system would : - serve to collect all data generated by measuring instruments at all stages in the process, from the sawmill to the planing mill - help to establish productivity and quality indicators for measuring the monetary value of process enhancements introduced by operators - make it possible to provide a rationale for other promising research approaches such as multivariate analysis and experimental design This approach would make it possible to enhance control of the drying process and process quality while also revealing potential energy savings.
Drying
Wood kiln
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Assessment of accuracy of species-temperature correction tables for resistance-type moisture meters

https://library.fpinnovations.ca/en/permalink/fpipub744
Author
Mackay, J.F.Graham
Date
May 1984
Edition
37057
Material Type
Research report
Field
Wood Manufacturing & Digitalization
moisture contents c a l c u l a t e d a f t e r oven-drying t h e i r t e s t samples. Complaints have f o
Author
Mackay, J.F.Graham
Date
May 1984
Edition
37057
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Moisture content
Lumber drying
Series Number
W-267
Location
Vancouver, British Columbia
Language
English
Abstract
Moisture determination, Electrical
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Atelier sur les taches de baguettes et la coloration de l'aubier

https://library.fpinnovations.ca/en/permalink/fpipub2045
Author
Cane, D.A.
Date
April 1990
Edition
38578
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Cane, D.A.
Date
April 1990
Edition
38578
Material Type
Research report
Physical Description
18 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Sticker stains
Stain
Sapstain
Drying
Series Number
E-1599
Location
Ottawa, Ontario
Language
French
Abstract
Sticker Stain - Control
Sapstain - Seminars
Lumber Drying - Stains and Staining
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Brown stain in white pine lumber : causes and cures

https://library.fpinnovations.ca/en/permalink/fpipub4673
Author
Garrahan, Peter A.
Cane, D.A.
Date
January 1993
Edition
41472
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Cane, D.A.
Date
January 1993
Edition
41472
Material Type
Research report
Physical Description
7 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Pinus
Stain
Softwoods
Prevention
Drying
Kilns
Location
Ottawa, Ontario
Language
English
Abstract
Softwoods
White Pine
Wood - Stains and Staining - Prevention
Kiln drying
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Les Chapes de béton et l'humidité emprisonnée dans le bois lamellé-croisé pendant la construction

https://library.fpinnovations.ca/en/permalink/fpipub7796
Author
Wang, Jieying
Date
Octobre 2020
Material Type
Research report
Field
Sustainable Construction
. Vancouver, Canada. Wang, J.Y. 2018. Wetting and drying performance related to on-site moisture management
Author
Wang, Jieying
Contributor
Natural Resources Canada. Canadian Forest Service
Forestry Innovation Investment
Date
Octobre 2020
Material Type
Research report
Physical Description
3 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Building systems
Subject
Concrete
Construction
Cross-Laminated Timber (CLT)
Moisture
Drying
Performance
Water repellents
Series Number
InfoNote 2020 n.9
Language
French
Abstract
FPInnovations a effectué un essai en laboratoire afin d’étudier la teneur en humidité (TH) du bois lamellé-croisé (CLT) découlant du coulage de chapes de béton, et l’efficacité avec laquelle un enduit imperméabilisant et une membrane permettent de de prévenir cette humidification.
Documents

InfoNote2020N9F.pdf

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Comparison of two kiln systems used in drying western hem-fir : Dehumidifcation (Heat pump) Hot air (Direct fired natural gas)

https://library.fpinnovations.ca/en/permalink/fpipub36973
Author
Mackay, J.F.Graham
Date
June 1985
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Mackay, J.F.Graham
Date
June 1985
Material Type
Research report
Physical Description
18 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Seasoning kilns
Seasoning kiln drying
Seasoning high temperature
Seasoning
Drying
Kilns
High temperature
Series Number
W-90
Location
Vancouver, British Columbia
Language
English
Abstract
Seasoning - Kilns - Tests
Seasoning - Dehumidification
Hem-fir - Seasoning
Seasoning - High temperature drying
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Computer models for lumber dry kiln control : progress report

https://library.fpinnovations.ca/en/permalink/fpipub5932
Author
Léger, Francine
Tarasiewicz, S.
Date
March 1997
Edition
41791
Material Type
Research report
Field
Wood Manufacturing & Digitalization
, drying has been based on schedules tuned in-house on a trial-and-error basis. In that context, the main
Author
Léger, Francine
Tarasiewicz, S.
Date
March 1997
Edition
41791
Material Type
Research report
Physical Description
89 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood drying
Wood
Drying
Location
Sainte-Foy, Québec
Language
English
Abstract
Wood - Drying - Computer Models
Documents
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156 records – page 1 of 16.