An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile

Background: Water accounts for around half of the total mass in living trees, and therefore large savings can be achieved if logs are dried before transporting or burning. Methods: An air-drying model for piled logs of Eucalyptus globulus Labill. and Eucalyptus nitens H.Deane & Maiden was developed. Daily moisture content (MC) loss was modelled based on meteorological variables and pile characteristics. The trial had a factorial design with two species, two debarking treatments (with or without bark) and two log lengths (244 and 350 cm). Independent trials started in July 2007 (winter), October 2007 (spring) and January 2008 (summer). There were five replicate piles per season and treatment. Wood pile masses were weighted weekly or twice weekly using a crane, a 10,000 kg balance and chains to hold the piles. Results: The main and interactive effects of seasons and treatments on daily MC loss were highly significant. However, the effect of season (climate) was far greater than the main effects of treatments or the season × treatment interaction. Overall, E. globulus dried 20 % faster than E. nitens, debarked logs dried 8 % faster than barked logs and 244 cm logs dried 3 % faster than 350 cm logs. Daily MC loss for the current day was better explained by a power function of MC at the start of the day, daily air relative humidity, daily air temperature and the number of logs per square metre of pile cross-section (or an equivalent average log diameter). Conclusions: The air-drying model for piled logs can be used to predict drying times (days) to achieve a given target moisture content, providing a new tool for decision-making in forest transport and industrial planning.

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Main Authors: Bown Intveen, Horacio, Lasserre, Jean-Pierre
Format: Artículo de revista biblioteca
Language:English
Published: Springer 2016-08-05T19:31:51Z
Subjects:Log air-drying model, Environmental variables, Eucalyptus, Management decisions,
Online Access:https://repositorio.uchile.cl/handle/2250/139932
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spelling dig-infor-cl-20.500.12220-261942023-06-20T14:42:25Z An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile Bown Intveen, Horacio Lasserre, Jean-Pierre Log air-drying model Environmental variables Eucalyptus Management decisions Background: Water accounts for around half of the total mass in living trees, and therefore large savings can be achieved if logs are dried before transporting or burning. Methods: An air-drying model for piled logs of Eucalyptus globulus Labill. and Eucalyptus nitens H.Deane & Maiden was developed. Daily moisture content (MC) loss was modelled based on meteorological variables and pile characteristics. The trial had a factorial design with two species, two debarking treatments (with or without bark) and two log lengths (244 and 350 cm). Independent trials started in July 2007 (winter), October 2007 (spring) and January 2008 (summer). There were five replicate piles per season and treatment. Wood pile masses were weighted weekly or twice weekly using a crane, a 10,000 kg balance and chains to hold the piles. Results: The main and interactive effects of seasons and treatments on daily MC loss were highly significant. However, the effect of season (climate) was far greater than the main effects of treatments or the season × treatment interaction. Overall, E. globulus dried 20 % faster than E. nitens, debarked logs dried 8 % faster than barked logs and 244 cm logs dried 3 % faster than 350 cm logs. Daily MC loss for the current day was better explained by a power function of MC at the start of the day, daily air relative humidity, daily air temperature and the number of logs per square metre of pile cross-section (or an equivalent average log diameter). Conclusions: The air-drying model for piled logs can be used to predict drying times (days) to achieve a given target moisture content, providing a new tool for decision-making in forest transport and industrial planning. 2016-08-05T19:31:51Z 2016-08-05T19:31:51Z 2016-08-05T19:31:51Z 2015 Artículo de revista New Zealand Journal of Forestry Science (2015) 45:17 DOI: 10.1186/s40490-015-0047-6 https://repositorio.uchile.cl/handle/2250/139932 en http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ Atribución-NoComercial-SinDerivadas 3.0 Chile Springer
institution INFOR CL
collection DSpace
country Chile
countrycode CL
component Bibliográfico
access En linea
databasecode dig-infor-cl
tag biblioteca
region America del Sur
libraryname Biblioteca del INFOR Chile
language English
topic Log air-drying model
Environmental variables
Eucalyptus
Management decisions
Log air-drying model
Environmental variables
Eucalyptus
Management decisions
spellingShingle Log air-drying model
Environmental variables
Eucalyptus
Management decisions
Log air-drying model
Environmental variables
Eucalyptus
Management decisions
Bown Intveen, Horacio
Lasserre, Jean-Pierre
An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
description Background: Water accounts for around half of the total mass in living trees, and therefore large savings can be achieved if logs are dried before transporting or burning. Methods: An air-drying model for piled logs of Eucalyptus globulus Labill. and Eucalyptus nitens H.Deane & Maiden was developed. Daily moisture content (MC) loss was modelled based on meteorological variables and pile characteristics. The trial had a factorial design with two species, two debarking treatments (with or without bark) and two log lengths (244 and 350 cm). Independent trials started in July 2007 (winter), October 2007 (spring) and January 2008 (summer). There were five replicate piles per season and treatment. Wood pile masses were weighted weekly or twice weekly using a crane, a 10,000 kg balance and chains to hold the piles. Results: The main and interactive effects of seasons and treatments on daily MC loss were highly significant. However, the effect of season (climate) was far greater than the main effects of treatments or the season × treatment interaction. Overall, E. globulus dried 20 % faster than E. nitens, debarked logs dried 8 % faster than barked logs and 244 cm logs dried 3 % faster than 350 cm logs. Daily MC loss for the current day was better explained by a power function of MC at the start of the day, daily air relative humidity, daily air temperature and the number of logs per square metre of pile cross-section (or an equivalent average log diameter). Conclusions: The air-drying model for piled logs can be used to predict drying times (days) to achieve a given target moisture content, providing a new tool for decision-making in forest transport and industrial planning.
format Artículo de revista
topic_facet Log air-drying model
Environmental variables
Eucalyptus
Management decisions
author Bown Intveen, Horacio
Lasserre, Jean-Pierre
author_facet Bown Intveen, Horacio
Lasserre, Jean-Pierre
author_sort Bown Intveen, Horacio
title An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
title_short An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
title_full An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
title_fullStr An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
title_full_unstemmed An air-drying model for piled logs of Eucalyptus globulus and Eucalyptus nitens in Chile
title_sort air-drying model for piled logs of eucalyptus globulus and eucalyptus nitens in chile
publisher Springer
publishDate 2016-08-05T19:31:51Z
url https://repositorio.uchile.cl/handle/2250/139932
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