A method to estimate wood surface moisture content during drying

A method to estimate the surface moisture content below the fibre saturation point that is a function of the surface temperature, wet- and dry bulb temperatures, equilibrium moisture content, and fibre saturation point was evaluated. The method is based on the premise that the surface temperature is...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Scheepers,G, Wiberg,P, Johansson,J
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2017
Materias:	Dry bulb temperature equilibrium moisture content fibre saturation point moisture measurement surface temperature wet bulb temperature
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200001
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-221X2017000200001
record_format	dspace
spelling	oai:scielo:S0718-221X20170002000012017-05-02A method to estimate wood surface moisture content during dryingScheepers,GWiberg,PJohansson,J Dry bulb temperature equilibrium moisture content fibre saturation point moisture measurement surface temperature wet bulb temperature A method to estimate the surface moisture content below the fibre saturation point that is a function of the surface temperature, wet- and dry bulb temperatures, equilibrium moisture content, and fibre saturation point was evaluated. The method is based on the premise that the surface temperature is solely influenced by the surface moisture content and the climate that the surface is exposed to. The prediction model contends that the surface moisture content is equal to the fibre saturation point when the surface temperature is equal to the wet bulb temperature, and equal to the equilibrium moisture content when the surface temperature is equal to the dry bulb temperature, with a linear interpolation between those two points. The model thus predicts that the average moisture content of a thin piece of veneer can be predicted with fairly good accuracy. Also, when drying boards in a fast changing climate, e.g. fan reversals in industrial kilns, the surface temperature and surface moisture content should change as abruptly as the climate does. Additionally, the surface moisture content should correlate to the known drying phases, with a consistently high surface moisture content during the capillary phase when the wet line is close to the surface, and a quickly decreasing surface moisture content when the wet line moves into the wood during the transition to the diffusion phase. The prediction model was tested in these three scenarios and the results suggest that the basic premise is reasonable, and that the method is useful for surface moisture content estimation.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.19 n.2 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200001en10.4067/S0718-221X2017005000011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dry bulb temperature equilibrium moisture content fibre saturation point moisture measurement surface temperature wet bulb temperature
spellingShingle	Dry bulb temperature equilibrium moisture content fibre saturation point moisture measurement surface temperature wet bulb temperature Scheepers,G Wiberg,P Johansson,J A method to estimate wood surface moisture content during drying
description	A method to estimate the surface moisture content below the fibre saturation point that is a function of the surface temperature, wet- and dry bulb temperatures, equilibrium moisture content, and fibre saturation point was evaluated. The method is based on the premise that the surface temperature is solely influenced by the surface moisture content and the climate that the surface is exposed to. The prediction model contends that the surface moisture content is equal to the fibre saturation point when the surface temperature is equal to the wet bulb temperature, and equal to the equilibrium moisture content when the surface temperature is equal to the dry bulb temperature, with a linear interpolation between those two points. The model thus predicts that the average moisture content of a thin piece of veneer can be predicted with fairly good accuracy. Also, when drying boards in a fast changing climate, e.g. fan reversals in industrial kilns, the surface temperature and surface moisture content should change as abruptly as the climate does. Additionally, the surface moisture content should correlate to the known drying phases, with a consistently high surface moisture content during the capillary phase when the wet line is close to the surface, and a quickly decreasing surface moisture content when the wet line moves into the wood during the transition to the diffusion phase. The prediction model was tested in these three scenarios and the results suggest that the basic premise is reasonable, and that the method is useful for surface moisture content estimation.
author	Scheepers,G Wiberg,P Johansson,J
author_facet	Scheepers,G Wiberg,P Johansson,J
author_sort	Scheepers,G
title	A method to estimate wood surface moisture content during drying
title_short	A method to estimate wood surface moisture content during drying
title_full	A method to estimate wood surface moisture content during drying
title_fullStr	A method to estimate wood surface moisture content during drying
title_full_unstemmed	A method to estimate wood surface moisture content during drying
title_sort	method to estimate wood surface moisture content during drying
publisher	Universidad del Bío-Bío
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200001
work_keys_str_mv	AT scheepersg amethodtoestimatewoodsurfacemoisturecontentduringdrying AT wibergp amethodtoestimatewoodsurfacemoisturecontentduringdrying AT johanssonj amethodtoestimatewoodsurfacemoisturecontentduringdrying AT scheepersg methodtoestimatewoodsurfacemoisturecontentduringdrying AT wibergp methodtoestimatewoodsurfacemoisturecontentduringdrying AT johanssonj methodtoestimatewoodsurfacemoisturecontentduringdrying
_version_	1714202635767119872

A method to estimate wood surface moisture content during drying

Ejemplares similares