Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto

Detalhes bibliográficos
Autor(a) principal: Stangerlin, Diego Martins
Data de Publicação: 2009
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Manancial - Repositório Digital da UFSM
dARK ID: ark:/26339/001300000m8p4
Texto Completo: http://repositorio.ufsm.br/handle/1/8640
Resumo: This study aimed at evaluating the use of solar kiln for the drying of woods of Eucalyptus tereticornis, Eucalyptus saligna and Corymbia citriodora, as well as comparing the methodology to the air drying. In order to do so, it was built a solar kiln composed basically of wood structures, roofing with a double layer of PVC plastic, sunlight internal collector system and hot air circulation system. The efficiency of the solar kiln was compared to the air drying in the following aspects: time and drying tax, variation of the environmental conditions and wood quality resulting from the drying. The three eucalyptus species used in this experiment were obtained from homogeneous stands, and the cutting of logs into planks was tangential. In the same period of drying, each species was submitted to the two drying methods, being used a load with 60 boards in each method. Results indicated that the solar kiln had been more efficient as for time and drying tax. The time of drying in solar kiln was around 2 to 5 times faster than the air drying. Although the experiments were carried out in the winter, in low insolation and solar radiation, the drying in solar kiln presented satisfactory drying taxes, similar to those ones observed in more sophisticated solar kiln all over the world. Even when the conditions were not favorable to the air drying, the solar kiln presented higher temperatures and smaller indexes of moisture content and of equilibrium. The dried wood, in solar kiln and air drying, presented good quality, and no incidences like cup or collapse were verified. Furthermore, the correct piling up and drying process provided minimization of defects like bow. Despite the major occurrences of pieces with crook in solar kiln drying, the differences among the crook arrows, in the two drying methods, were insignificant. The incidence of end checking occurred from the drying in solar kiln was smaller in relation to the air drying only for woods of Eucalyptus tereticornis. On the other hand, the incidence of surface checks followed from the drying in solar kiln was inferior in comparison to the air drying process for the wood of Corymbia citriodora and Eucalyptus saligna.
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spelling Avaliação do uso de estufa solar para secagem de madeira serrada de eucaliptoEvaluation of the use of solar kiln for the drying of sawed wood of eucalyptusSecagem solarSecagem da madeiraQualidade da madeiraMadeiras refratáriasSolar dryingDrying woodWood qualityRefractory woodCNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTALThis study aimed at evaluating the use of solar kiln for the drying of woods of Eucalyptus tereticornis, Eucalyptus saligna and Corymbia citriodora, as well as comparing the methodology to the air drying. In order to do so, it was built a solar kiln composed basically of wood structures, roofing with a double layer of PVC plastic, sunlight internal collector system and hot air circulation system. The efficiency of the solar kiln was compared to the air drying in the following aspects: time and drying tax, variation of the environmental conditions and wood quality resulting from the drying. The three eucalyptus species used in this experiment were obtained from homogeneous stands, and the cutting of logs into planks was tangential. In the same period of drying, each species was submitted to the two drying methods, being used a load with 60 boards in each method. Results indicated that the solar kiln had been more efficient as for time and drying tax. The time of drying in solar kiln was around 2 to 5 times faster than the air drying. Although the experiments were carried out in the winter, in low insolation and solar radiation, the drying in solar kiln presented satisfactory drying taxes, similar to those ones observed in more sophisticated solar kiln all over the world. Even when the conditions were not favorable to the air drying, the solar kiln presented higher temperatures and smaller indexes of moisture content and of equilibrium. The dried wood, in solar kiln and air drying, presented good quality, and no incidences like cup or collapse were verified. Furthermore, the correct piling up and drying process provided minimization of defects like bow. Despite the major occurrences of pieces with crook in solar kiln drying, the differences among the crook arrows, in the two drying methods, were insignificant. The incidence of end checking occurred from the drying in solar kiln was smaller in relation to the air drying only for woods of Eucalyptus tereticornis. On the other hand, the incidence of surface checks followed from the drying in solar kiln was inferior in comparison to the air drying process for the wood of Corymbia citriodora and Eucalyptus saligna.Conselho Nacional de Desenvolvimento Científico e TecnológicoO 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 a metodologia com a secagem ao ar livre. Para tanto, foi desenvolvido um secador solar composto basicamente de estruturas de madeira, cobertura com dupla camada de plástico PVC, sistema coletor interno de luz solar e sistema de circulação do ar aquecido. A avaliação da eficiência do secador solar foi comparada à secagem ao ar livre nos seguintes aspectos: tempo e taxa de secagem, variação das condições ambientais e qualidade da madeira resultante da secagem. As três espécies de eucalipto utilizadas nesse experimento foram obtidas em povoamentos homogêneos, sendo o desdobro realizado por meio de cortes tangenciais. Cada espécie foi submetida, no mesmo período, aos dois métodos de secagem, utilizando-se uma carga com 60 tábuas em cada método. Os resultados obtidos indicaram que a estufa solar foi mais eficiente quanto ao tempo e à taxa de secagem. Os tempos de secagem em estufa solar foram em torno de 2 a 5 vezes menores que a secagem ao ar livre. Apesar dos ensaios terem sido realizados durante o inverno, com baixa insolação e radiação solar, a secagem em estufa solar apresentou taxas de secagem satisfatórias, semelhantes às observadas em secadores solares mais sofisticados espalhados pelo mundo. Mesmo quando as condições não eram propícias à secagem ao ar livre, a estufa solar apresentou maiores temperaturas e menores índices de umidade relativa do ar e de equilíbrio. 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 adequado processo de empilhamento e secagem proporcionou minimização dos defeitos do tipo encurvamento. Apesar da maior ocorrência de peças arqueadas na secagem em estufa solar, a diferença entre as flechas de arqueamento, nos dois métodos de secagem, foi mínima. A incidência de rachaduras de topo resultantes da secagem em estufa solar foi inferior em relação ao ar livre apenas para a madeira de Eucalyptus tereticornis. Já a incidência de rachaduras superficiais resultantes da secagem em estufa solar foi inferior em comparação ao processo ao ar livre para as madeiras de Corymbia citriodora e Eucalyptus saligna.Universidade Federal de Santa MariaBRRecursos Florestais e Engenharia FlorestalUFSMPrograma de Pós-Graduação em Engenharia FlorestalSantini, Elio Joséhttp://lattes.cnpq.br/1939844237237675Hillig, Évertonhttp://lattes.cnpq.br/5240619272740210Oliveira, Leonardo da Silvahttp://lattes.cnpq.br/2363993318645257Gatto, Darci Albertohttp://lattes.cnpq.br/0592339091520248Stangerlin, Diego Martins2009-04-022009-04-022009-03-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfSTANGERLIN, Diego Martins. Evaluation of the use of solar kiln for the drying of sawed wood of eucalyptus. 2009. 113 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2009.http://repositorio.ufsm.br/handle/1/8640ark:/26339/001300000m8p4porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-04-06T17:46:34Zoai:repositorio.ufsm.br:1/8640Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-04-06T17:46:34Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
Evaluation of the use of solar kiln for the drying of sawed wood of eucalyptus
title Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
spellingShingle Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
Stangerlin, Diego Martins
Secagem solar
Secagem da madeira
Qualidade da madeira
Madeiras refratárias
Solar drying
Drying wood
Wood quality
Refractory wood
CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL
title_short Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
title_full Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
title_fullStr Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
title_full_unstemmed Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
title_sort Avaliação do uso de estufa solar para secagem de madeira serrada de eucalipto
author Stangerlin, Diego Martins
author_facet Stangerlin, Diego Martins
author_role author
dc.contributor.none.fl_str_mv Santini, Elio José
http://lattes.cnpq.br/1939844237237675
Hillig, Éverton
http://lattes.cnpq.br/5240619272740210
Oliveira, Leonardo da Silva
http://lattes.cnpq.br/2363993318645257
Gatto, Darci Alberto
http://lattes.cnpq.br/0592339091520248
dc.contributor.author.fl_str_mv Stangerlin, Diego Martins
dc.subject.por.fl_str_mv Secagem solar
Secagem da madeira
Qualidade da madeira
Madeiras refratárias
Solar drying
Drying wood
Wood quality
Refractory wood
CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL
topic Secagem solar
Secagem da madeira
Qualidade da madeira
Madeiras refratárias
Solar drying
Drying wood
Wood quality
Refractory wood
CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL
description This study aimed at evaluating the use of solar kiln for the drying of woods of Eucalyptus tereticornis, Eucalyptus saligna and Corymbia citriodora, as well as comparing the methodology to the air drying. In order to do so, it was built a solar kiln composed basically of wood structures, roofing with a double layer of PVC plastic, sunlight internal collector system and hot air circulation system. The efficiency of the solar kiln was compared to the air drying in the following aspects: time and drying tax, variation of the environmental conditions and wood quality resulting from the drying. The three eucalyptus species used in this experiment were obtained from homogeneous stands, and the cutting of logs into planks was tangential. In the same period of drying, each species was submitted to the two drying methods, being used a load with 60 boards in each method. Results indicated that the solar kiln had been more efficient as for time and drying tax. The time of drying in solar kiln was around 2 to 5 times faster than the air drying. Although the experiments were carried out in the winter, in low insolation and solar radiation, the drying in solar kiln presented satisfactory drying taxes, similar to those ones observed in more sophisticated solar kiln all over the world. Even when the conditions were not favorable to the air drying, the solar kiln presented higher temperatures and smaller indexes of moisture content and of equilibrium. The dried wood, in solar kiln and air drying, presented good quality, and no incidences like cup or collapse were verified. Furthermore, the correct piling up and drying process provided minimization of defects like bow. Despite the major occurrences of pieces with crook in solar kiln drying, the differences among the crook arrows, in the two drying methods, were insignificant. The incidence of end checking occurred from the drying in solar kiln was smaller in relation to the air drying only for woods of Eucalyptus tereticornis. On the other hand, the incidence of surface checks followed from the drying in solar kiln was inferior in comparison to the air drying process for the wood of Corymbia citriodora and Eucalyptus saligna.
publishDate 2009
dc.date.none.fl_str_mv 2009-04-02
2009-04-02
2009-03-06
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv STANGERLIN, Diego Martins. Evaluation of the use of solar kiln for the drying of sawed wood of eucalyptus. 2009. 113 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2009.
http://repositorio.ufsm.br/handle/1/8640
dc.identifier.dark.fl_str_mv ark:/26339/001300000m8p4
identifier_str_mv STANGERLIN, Diego Martins. Evaluation of the use of solar kiln for the drying of sawed wood of eucalyptus. 2009. 113 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2009.
ark:/26339/001300000m8p4
url http://repositorio.ufsm.br/handle/1/8640
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Recursos Florestais e Engenharia Florestal
UFSM
Programa de Pós-Graduação em Engenharia Florestal
publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Recursos Florestais e Engenharia Florestal
UFSM
Programa de Pós-Graduação em Engenharia Florestal
dc.source.none.fl_str_mv reponame:Manancial - Repositório Digital da UFSM
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Manancial - Repositório Digital da UFSM
collection Manancial - Repositório Digital da UFSM
repository.name.fl_str_mv Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv atendimento.sib@ufsm.br||tedebc@gmail.com
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