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Uso de estufa solar para secagem de madeira serrada

Authors: Stangerlin, Diego Martins; Santini, Elio José; Susin, Felipe; Melo, Rafael Rodolfo de; Gatto, Darci Alberto; Haselein, Clovis Roberto;

Uso de estufa solar para secagem de madeira serrada

Abstract

O objetivo desse estudo foi avaliar o uso da estufa solar para secagem das madeiras de Eucalyptus tereticornis, Eucalyptus saligna e Corymbia citriodora, bem como comparar essa metodologia com a secagem ao ar livre. Para tanto, foi desenvolvido um secador solar constituído por estruturas de madeira, cobertura com dupla camada de plástico PVC (policloreto de vinila), sistema coletor interno de energia solar e sistema de circulação do ar aquecido. A eficiência do secador solar foi comparada com a secagem ao ar livre quanto ao tempo de secagem e qualidade da madeira. Cada espécie foi submetida, no mesmo período, aos dois métodos de secagem, sendo utilizadas cargas com 55 tábuas em cada método. Os resultados obtidos indicaram que a estufa solar foi mais eficiente apresentando tempo de secagem de duas a cinco vezes menores que a secagem ao ar livre e com teor de umidade final mais baixo. A madeira seca, tanto na estufa solar quanto ao ar livre, apresentou boa qualidade, não sendo verificada a incidência de defeitos como encanoamento e colapso. Além disso, o correto empilhamento e a tecnologia de secagem utilizados proporcionaram poucos empenos do tipo encurvamento. A incidência de arqueamentos, rachaduras de superfície e de topo não apresentaram diferença significativa entre a secagem em estufa solar e ao ar livre para as três madeiras estudadas.

Keywords

refractory wood, S, secagem solar, madeiras refratárias, Agriculture, Forestry, SD1-669.5, wood quality, taxa de secagem, qualidade da madeira, solar drying, drying rate

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Green
gold