Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)

The heat transfer through three orthotropic directions and the evolution of temperature gradient in beech (Fagus orientalis) and spruce (Picea abies) during drying were investigated. Thus, due to low capacity of dryer, small flat-sawn boards with dimensions of 80 × 25 × 40 mm (L×R×T) were used. Then...

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Autores principales:	asghar tarmian, Amir Sepehr
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2010
Materias:	Heat transfer Temperature profile drying Spruce beech Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/c9aed0832f1c4aa6b1210d79aa9275c6
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id	oai:doaj.org-article:c9aed0832f1c4aa6b1210d79aa9275c6
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spelling	oai:doaj.org-article:c9aed0832f1c4aa6b1210d79aa9275c62021-12-02T09:10:58ZInvestigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)1735-09132383-112X10.22092/ijwpr.2010.117291https://doaj.org/article/c9aed0832f1c4aa6b1210d79aa9275c62010-09-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_117291_381dd6fc03a51976b1a097a58707c242.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XThe heat transfer through three orthotropic directions and the evolution of temperature gradient in beech (Fagus orientalis) and spruce (Picea abies) during drying were investigated. Thus, due to low capacity of dryer, small flat-sawn boards with dimensions of 80 × 25 × 40 mm (L×R×T) were used. Then, the boards were dried at the dry-bulb temperature of 60 °C and relative humidity of 50 %. Four surfaces of the boards were coated by polyurethane-coated aluminum foil to confine the heat flux along one direction. Then, the boards were thermally insulated by 50 mm-thick Styrofoam. Some holes with 1mm in diameter were made on the board specific distances to measure the temperature using thermocouple. The results showed that the temperature of each wood increased as heating up progressed until it reached to the wet-bulb temperature. Then, it remained at an almost constant value as the wet bulb temperature until the wood moisture content reached the hygroscopic range. Furthermore, the pattern of the temperature profile for both wood species was almost identical. The surface temperature of the boards increased until it reached the dry-bulb temperature of 60 °C, while the core temperate remained as the wet-bulb temperature (48-52 °C) throughout the rest of drying period.asghar tarmianAmir SepehrRegional Information Center for Science and Technology (RICeST)articleHeat transferTemperature profiledryingSprucebeechForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 25, Iss 2, Pp 234-247 (2010)
institution	DOAJ
collection	DOAJ
language	FA
topic	Heat transfer Temperature profile drying Spruce beech Forestry SD1-669.5
spellingShingle	Heat transfer Temperature profile drying Spruce beech Forestry SD1-669.5 asghar tarmian Amir Sepehr Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
description	The heat transfer through three orthotropic directions and the evolution of temperature gradient in beech (Fagus orientalis) and spruce (Picea abies) during drying were investigated. Thus, due to low capacity of dryer, small flat-sawn boards with dimensions of 80 × 25 × 40 mm (L×R×T) were used. Then, the boards were dried at the dry-bulb temperature of 60 °C and relative humidity of 50 %. Four surfaces of the boards were coated by polyurethane-coated aluminum foil to confine the heat flux along one direction. Then, the boards were thermally insulated by 50 mm-thick Styrofoam. Some holes with 1mm in diameter were made on the board specific distances to measure the temperature using thermocouple. The results showed that the temperature of each wood increased as heating up progressed until it reached to the wet-bulb temperature. Then, it remained at an almost constant value as the wet bulb temperature until the wood moisture content reached the hygroscopic range. Furthermore, the pattern of the temperature profile for both wood species was almost identical. The surface temperature of the boards increased until it reached the dry-bulb temperature of 60 °C, while the core temperate remained as the wet-bulb temperature (48-52 °C) throughout the rest of drying period.
format	article
author	asghar tarmian Amir Sepehr
author_facet	asghar tarmian Amir Sepehr
author_sort	asghar tarmian
title	Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
title_short	Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
title_full	Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
title_fullStr	Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
title_full_unstemmed	Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)
title_sort	investigation on the heat transfer and evolution of temperature gradient through wood during drying; case study: beech (fagus orientalis) and spruce (picea abies)
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2010
url	https://doaj.org/article/c9aed0832f1c4aa6b1210d79aa9275c6
work_keys_str_mv	AT asghartarmian investigationontheheattransferandevolutionoftemperaturegradientthroughwoodduringdryingcasestudybeechfagusorientalisandsprucepiceaabies AT amirsepehr investigationontheheattransferandevolutionoftemperaturegradientthroughwoodduringdryingcasestudybeechfagusorientalisandsprucepiceaabies
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Investigation on the heat transfer and evolution of temperature gradient through wood during drying; Case study: beech (Fagus orientalis) and spruce (Picea abies)

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