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Manuel de séchage des placages

https://library.fpinnovations.ca/fr/permalink/fpipub38869
Auteur
Feihl, A.O.
Date
January 1984
Genre du document
manual
Domaine
Wood Manufacturing & Digitalization
personnel. It covers the following subjects: veneer moisture content, moisture detectors, drying process
Auteur
Feihl, A.O.
Date
January 1984
Genre du document
manual
Description physique
116 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Moisture content
Manual
Série
E-3136
Localisation
Ottawa, Ontario
Langue
French
ISBN
ISBN-0-86488-506-8
Résumé
Ce manuel assemble les renseignements existants sur la technologie du séchage des placages. Il est destiné aux opérateurs de séchoirs, aux contremaîtres et aux gérants. Il est conçu spécialement pour les usines de l'Est du Canada mais contient des références aux essences et aux méthodes de séchage couramment utilisées dans l'Ouest canadien. Les sujets suivants sont abordés dans ce manuel: humidité du placage, hydromètres, processus de séchage, types de séchoirs, opération et entretien des séchoirs, incendies, pollution et défauts des placages causés par le séchage.
Dry Kilns
Drying Process
Drying Technology
Veneers - Drying - Handbooks, manuals, etc.
Veneers - Moisture content
Forintek Canada Corp. - Publications
Documents
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Assessment of accuracy of species-temperature correction tables for resistance-type moisture meters

https://library.fpinnovations.ca/fr/permalink/fpipub744
Auteur
Mackay, J.F.Graham
Date
May 1984
Édition
37057
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
f o r moisture content, lumber had t o be overdried r e s u l t i n g i n unnecessary extension
Auteur
Mackay, J.F.Graham
Date
May 1984
Édition
37057
Genre du document
Research report
Description physique
10 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Moisture content
Lumber drying
Série
W-267
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Moisture determination, Electrical
Documents
Moins de détails

Moisture content correction tables for the resistance-type moisture meter : eastern species

https://library.fpinnovations.ca/fr/permalink/fpipub38195
Auteur
Pfaff, Frank
Garrahan, Peter A.
Date
August 1984
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
humidit pour hygrom&res 51 r&sistance Moisture Content Correction Tables for the Resistance-Type
Auteur
Pfaff, Frank
Garrahan, Peter A.
Date
August 1984
Genre du document
Research report
Description physique
42 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Moisture content
Measurement
Série
Special Publication SP-511E
E-629
Localisation
Ottawa, Ontario
Langue
English
ISBN
ISBN-0-86488-511-1
Résumé
Correction factors are provided for the Delmhorst resistance-type moisture meters equipped with 2-pin insulated electrodes. These factors allow the operator to adjust the meter reading for a wood temperature range of -40 degree centigrade to 50 degree centigrade. Factors are provided for 12 softwood species and 14 hardwood species.
Moisture Meter
Eastern Species
Moisture Content Correction Tables
Forintek Canada Corp. - Publications
Documents
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Humidimètres pour la biomasse

https://library.fpinnovations.ca/fr/permalink/fpipub39765
Auteur
Volpé, Sylvain
Date
February 2014
Genre du document
Research report
Domaine
Fibre Supply
biofuels – Determination of moisture content – Oven dry method – Part 2: Total moisture – Simplified
Auteur
Volpé, Sylvain
Date
February 2014
Genre du document
Research report
Description physique
17 p.
Secteur
Forest Operations
Domaine
Fibre Supply
Champ de recherche
Forestry
Sujet
Biomass
Moisture content
Sampling
Measurement
Heat
Advantage
Série
Avantage ; Vol. 14, No. 5
Langue
English
ISSN
14933381
Résumé
One of the challenges to the use of biomass in heat applications is to find a suitable technology to take quick and accurate moisture content (MC) measurements of comminuted forest biomass. In this study, we tested three difference technologies (electric, nuclear and infrared) and five different tools. Of the three technologies tested, electric is the most promising. It is usually inexpensive (<$1000), requires small-sized samples (10 L), is fast to read (<1 minute) and is relatively accurate with more than 70% of measurements within 5% MC of the oven-dried method.
BIOMASS
MOISTURE CONTENT
TECHNOLOGY
ELECTRIC ANALYZERS
NUCLEAR RADIATION
INFRARED DETECTORS
ACCURACY
MEASUREMENT
TIME
Sample size
Résumé
L’une des difficultés associées à l’utilisation de la biomasse forestière broyée pour produire de la chaleur consiste à trouver une technologie convenable pour prendre rapidement des mesures précises de la teneur en humidité (TH). Pour la présente étude, nous avons mis à l’essai trois technologies (électrique, nucléaire et infrarouge) et cinq appareils différents. Parmi les trois technologies, c’est la technologie électrique qui est la plus prometteuse. Les appareils sont généralement peu coûteux (< 1000 $), nécessitent des échantillons de petite taille (10 L), donnent les résultats rapidement (<1 minute) et sont relativement précis, plus de 70 % des mesures se situant à plus ou moins 5 % de la TH obtenue par la méthode de séchage à l’étude.
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Phase I : Drying performance of experimental wood roof assemblies

https://library.fpinnovations.ca/fr/permalink/fpipub42987
Auteur
Wang, Jieying
Date
February 2014
Genre du document
Research report
Domaine
Sustainable Construction
the changes in the average moisture content (MC) of each wood deck. In total, 111 assemblies were tested
Auteur
Wang, Jieying
Collaborateur
Natural Resources Canada. Canadian Forest Service.
Date
February 2014
Genre du document
Research report
Description physique
37 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Drying
Moisture content
Roofs
British Columbia
Série
Transformative Technologies
W-3070
Langue
English
Résumé
A study was initiated in late 2012 to assist in designing panelized wood roofs and other wood roof assemblies as part of the work supporting the British Columbia (BC) Advisory Group on Advanced Wood Design Solutions. The test aimed primarily to assess and compare the drying performance of different roof assemblies with built-in moisture under worst-case scenarios in the coastal climate of BC. A range of roof assemblies were built using plywood, OSB, cross-laminated timber (CLT), or laminated veneer lumber (LVL) as the roof deck. Each deck specimen was wetted using hourly spray of water for 15-20 days in the laboratory. Either self-adhered impermeable membrane, or standard roofing felt plus asphalt shingles, was used to cover the wetted top surface. Closed-cell spray foam insulation was applied on the bottom surface in several roof assemblies to assess its impact on the drying performance. Subsequent drying was carried out under three ambient conditions for three groups of specimens, beginning in February or March, 2013. Limited drying forces, except natural moisture diffusion and evaporation, were created, except for one roof assembly placed under controlled temperature gradients. The drying rates of each wood deck were monitored by weighing the roof assemblies periodically, followed by calculating the changes in the average moisture content (MC) of each wood deck. In total, 111 assemblies were tested to compare the drying rates between different wood decks and between different assemblies. The major test results included:
The MCs of the plywood, OSB, CLT, and LVL specimens, after hourly spray in the laboratory for 15 to 20 days, were all highly comparable with those of the naturally exposed reference specimens after about two months of natural exposure from January to March. This validated the use of such laboratory wetting to simulate severe wetting scenarios on construction sites.
The four types of roof deck materials in this study showed very different water absorption and wetting potentials. The CLT specimens, as a mass timber product tested in this study, showed the lowest wetting potential, closely followed by LVL. The plywood and the OSB specimens tested had the highest MCs after wetting under both conditions.
In general the higher the material’s wetting potential, the faster it would dry under conditions allowing drying.
The CLT and LVL assemblies, covered with impermeable membrane on the wetted surfaces, showed little drying during the test periods. The use of two layers of plywood as a roof deck also showed much slower drying compared with the one-layer assemblies, when covered with an impermeable membrane on the wetted surfaces.
The combination of 15-pound roofing felt and asphalt shingles showed only slightly better vapour permeance, as indicated by the slightly better drying performance of roof assemblies, compared with the impermeable membrane used in this test.
All of the roof deck materials tested had very poor drying performance when enclosed in materials with low vapour permeance, such as impermeable membranes and closed-cell spray foam.
Among the three main drying conditions used in this study, the plywood and OSB assemblies in the shed showed the lowest drying, and those in the lab showed the fastest drying, with those in the conditioning chamber providing intermediate drying rates. Such differences appeared to correlate well with the vapour pressure differences between the saturated pressures and the partial pressures of the environments. The shed was intended to simulate covered on-site conditions in this climate. This test indicated that, when roof panels get wet, drying during construction can be improved fairly easily for relatively permeable panels or assemblies, such as one layer of plywood or OSB, one layer of plywood or OSB covered with other materials only on one side. Favourable weather conditions and mechanical methods (e.g., ventilation and space heating) can accelerate drying. However, the ambient environment may not have much effect on the drying performance of relatively impermeable products or assemblies, including massive wood members and wood enclosed in impermeable materials. The test data also indicates that drying could take a long time, typically weeks and even months depending on environmental conditions, once wood panels get severely wet. This could allow mould growth and even decay to occur under severe circumstances. This study confirms the importance of keeping wood dry in the first place, and drying wood before enclosure when wetting occurs as the second strategy, in order to minimize moisture-related risks. Guidelines are needed to recommend best practices for on-site wood protection and moisture management in wet climates, for the use of innovative engineered wood products in larger building projects in particular.
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Matapedia roundwood tarping trials

https://library.fpinnovations.ca/fr/permalink/fpipub39799
Auteur
Volpé, Sylvain
Date
March 2014
Genre du document
Research report
Domaine
Fibre Supply
. ........................................................................................ 5 Figure 3. Disc samples to determine the initial moisture content in January 2012
Auteur
Volpé, Sylvain
Date
March 2014
Genre du document
Research report
Description physique
12 p.
Secteur
Forest Operations
Domaine
Fibre Supply
Champ de recherche
Forestry
Sujet
Biomass
Moisture content
Drying
Storing
Logs
Advantage
Série
Advantage ; Vol. 14, No. 8
Langue
English
ISSN
14933381
Résumé
The effects of natural drying in relation to the use of tarps on the moisture content of stacked softwood roundwood were examined. Biomass quality logs were stored for a period of 15 months in a mill yard in the Bas Saint-Laurent region of Quebec. The results of the study showed that the roundwood dried naturally during the summer season with moisture content at the end of the season below 30%. Tarping the roundwood piles during the fall and winter prevented an average increase in moisture content of 6%.
Résumé
Cette étude d'entreposage de la biomasse forestière visait à évaluer les effets du séchage naturel par rapport à l'utilisation de bâches sur la teneur en humidité de bois rond résineux au cours d'une période de 15 mois. Des billes de qualité biomasse ont été empilées dans un parc d'usine de la région du Bas-Saint-Laurent, au Québec. Les résultats de l'étude ont démontré que la biomasse séchait très bien naturellement pendant l'été avec un taux d'humidité en fin de la saison estivale en-dessous de 30%. La bâchage des empilements de biomasse au cours de l'automne et de l'hiver a permis d'éviter une augmentation moyenne du taux d'humidité de 6 %.
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Field monitoring of hygrothermal performance of a wood-frame house in the Lower Mainland of BC built to the passive house standard

https://library.fpinnovations.ca/fr/permalink/fpipub6071
Auteur
Wang, Jieying
Mistretta, S.
Date
March 2014
Édition
43873
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Wang, Jieying
Mistretta, S.
Collaborateur
Forestry Innovation Investment
Natural Resources Canada. Canadian Forest Service.
Date
March 2014
Édition
43873
Genre du document
Research report
Description physique
30 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Moisture content
Série
W-3100
Langue
English
Résumé
A single-family wood-frame house in the Lower Mainland of British Columbia built to the German Passivhaus (Passive House) standard was monitored to investigate its thermal performance and durability in this mild climate. Two double-stud walls, south- and north-facing, were instrumented during construction to measure moisture and thermal performance. A limited amount of thermal modelling was conducted to compare with the field measurements. Monitoring over the past 20 months showed that:
The double-stud walls, south- and north-facing, were both performing well in terms of durability. The moisture content (MC) measured at the bottom of the studs was in general below 15% after the construction was completed. The MC of the south-facing wall dropped from an initial 20%, measured during construction, to about 11% after construction was completed. During the same period of time, the MC of the north-facing wall fell from about 19% to 15%; the slightly higher MC in this wall compared to that in the south-facing wall was a result of lower amounts of solar gain in this orientation.
The relative humidity (RH) measured on the interior side of the medium-density fibreboard (MDF) exterior sheathing in the south-facing wall ranged from 70% to 80%, and occasionally up to 90% during the winter. Being typical of exterior sheathing conditions without exterior insulation in this mild climate, the corresponding RH ranged from 80% up to 100% in the north-facing wall in the winter, indicating potential vapour condensation at this critical location.
Based on vapour pressure analysis, no steep vapour pressure gradients between any specific layers were found in these two walls, indicating the overall vapour permeable nature and good drying performance of the wall design. This could be partially attributed to the use of plywood as structural sheathing located between the double-stud walls as the air barrier and vapour retarding layer, and using MDF as the exterior sheathing.
In the south-facing wall, the vapour pressure analysis showed a vapour drive in the summer from the exterior layers towards the interior layer, primarily due to high temperature outside. The exterior sheathing should have good drying potential if wetting occurred. On the other hand, the partial vapour pressures were largely consistent across the north-facing wall in the winter, not showing a strong vapour drive from interior to exterior in this mild climate. The exterior sheathing would have poor drying performance if wetting occurred in this location.
The simulated temperature distributions based on THERM 6.3 simulations were generally in good agreement with the measured temperatures across the walls, indicating that the thermal simulation was reasonably accurate. The effective R-value of the double-stud walls of this passive house was calculated to be approximately R-50 (hržft2žF/Btu) or RSI-8.8 (m2K)/W) (i.e. with a thermal transmission coefficient of 0.114 W/m2žK). The use of heat flux sensors was not successful in this work, probably due to improper sensor calibration or in-situ installation. Its use needs further exploration to measure heat flow in building envelopes in order to validate calculated effective thermal insulation.
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Short-term evaluation of the Kobelco BladeRunner ED150 for road rehabilitation

https://library.fpinnovations.ca/fr/permalink/fpipub39815
Auteur
Partington, Mark
Date
May 2014
Genre du document
Research report
Domaine
Fibre Supply
Auteur
Partington, Mark
Date
May 2014
Genre du document
Research report
Description physique
11 p.
Secteur
Forest Operations
Domaine
Fibre Supply
Champ de recherche
Transportation Infrastructure
Sujet
Biomass
Moisture content
Drying
Storing
Logs
Advantage
Série
Advantage ; Vol. 15, No. 1
Langue
English
ISSN
14933381
Résumé
FPInnovations performed short-term productivity studies on a road rehabilitation operation that utilized a Kobelco ED150 BladeRunner. The BladeRunner is a multi-purpose machine that can function as an excavator and a bulldozer, due to its front blade attachment. Productivity studies were also performed on an excavator (John Deere 200C) and bulldozer (Caterpillar D6M) team that performed the same work as the BladeRunner.
ROADS
MACHINERY
HARVESTERS
Résumé
FPInnovations a effectué des études de productivité à court terme dans le cadre d’une opération de remise en état de routes effectuée à l’aide d’un BladeRunner, modèle Kobelco ED150, une machine multifonctions qui peut être utilisée comme excavatrice ou bulldozer en raison de sa fixation frontale pour lames. Des études de productivité ont aussi été réalisées sur une combinaison excavatrice (John Deere 200C) et bulldozer (Caterpillar D6M) qui effectuent les même tâches que le BladeRunner.
Documents
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Study to examine the effects of log moisture sorting on OSB manufacturing

https://library.fpinnovations.ca/fr/permalink/fpipub39823
Auteur
Groves, C. Kevin
Date
May 2014
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
) study was carried-out to better understand the effects of log moisture content on the manufacturing
Auteur
Groves, C. Kevin
Collaborateur
Natural Resources Canada. Canadian Forest Service.
Date
May 2014
Genre du document
Research report
Description physique
28 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Logs
Moisture content
OSB
Sorting
Série
W-3096
Langue
English
Résumé
In the Canadian OSB industry raw log moistures are generally thought to be a significant factor effecting mill operation. In 2012/13 an FPInnovations study was carried out to better understand the effects of log moisture content on the manufacturing operations at a western Canadian OSB mill. The information collected was intended to assist the mill to make informed decisions on log yard management and harvesting and also to understand the best possible scenarios for producing a quality product as cost effectively as possible. Of particular interest was whether benefits could be made by processing dryer wood as a means of increasing dryer capacity but without incurring significant costs resulting from lower strand quality, especially fines and the associated costs of increased resin usage and panel density.
Documents
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Évaluation de courte durée de la Kobelco BladeRunner ED150 pour la réfection des route

https://library.fpinnovations.ca/fr/permalink/fpipub39941
Auteur
Partington, Mark
Date
May 2014
Genre du document
Research report
Domaine
Fibre Supply
Auteur
Partington, Mark
Date
May 2014
Genre du document
Research report
Description physique
11 p.
Secteur
Forest Operations
Domaine
Fibre Supply
Champ de recherche
Transportation Infrastructure
Sujet
Biomass
Moisture content
Drying
Storing
Logs
Advantage
Série
Avantage ; Vol. 15, No. 1
Langue
French
ISSN
14933381
Résumé
FPInnovations performed short-term productivity studies on a road rehabilitation operation that utilized a Kobelco ED150 BladeRunner. The BladeRunner is a multi-purpose machine that can function as an excavator and a bulldozer, due to its front blade attachment. Productivity studies were also performed on an excavator (John Deere 200C) and bulldozer (Caterpillar D6M) team that performed the same work as the BladeRunner.
ROADS
MACHINERY
HARVESTERS
Résumé
FPInnovations a effectué des études de productivité à court terme dans le cadre d’une opération de remise en état de routes effectuée à l’aide d’un BladeRunner, modèle Kobelco ED150, une machine multifonctions qui peut être utilisée comme excavatrice ou bulldozer en raison de sa fixation frontale pour lames. Des études de productivité ont aussi été réalisées sur une combinaison excavatrice (John Deere 200C) et bulldozer (Caterpillar D6M) qui effectuent les même tâches que le BladeRunner.
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10 notices – page 1 of 1.