Efficiency of radiofrequency-vacuum (RF/V) technology for mixed-species drying of wood disks with inherent defects

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dc.authoridUnsal, Oner/0000-0001-7562-6727
dc.authoridCiritcioglu, Hasan Huseyin/0000-0002-8694-0663
dc.authorwosidUnsal, Oner/D-6427-2019
dc.authorwosidCiritcioglu, Hasan Huseyin/A-5455-2019
dc.contributor.authorTarmian, Asghar
dc.contributor.authorCiritcioglu, Hasan Huseyin
dc.contributor.authorUnsal, Oner
dc.contributor.authorAhmadi, Peyman
dc.contributor.authorGholampour, Behnam
dc.contributor.authorOladi, Reza
dc.date.accessioned2021-12-01T18:49:06Z
dc.date.available2021-12-01T18:49:06Z
dc.date.issued2020
dc.department[Belirlenecek]en_US
dc.description.abstractFreshly cut 30-mm-thick wood disks of Scots pine, Caucasian elm, narrow-leafed ash, wild cherry, black walnut, and European alder with various natural grade defects were dried together in a radiofrequency-vacuum (RF/V) dryer. A mild four-step drying schedule at the maximum temperature of 45 degrees C and power density in the range of 1-2 kWm(-3)with an on-off control of RF radiation at the final step was used. The moisture content of the disks at the end of drying ranged from 10.6% to 13.4%. An almost uniform radial moisture gradient developed in the dried disks. The six wood species, however, exhibited variations in checking. The RF/V drying schedule used here was able to completely inhibit near-bark radial checking in all disks but pine and elm, whereas it failed to efficiently prevent V-cracking in pine and ash with a high mean tangential to radial shrinkage anisotropy (S-T/S-R). A strong positive correlation was also found between S-T/S(R)and the proportion of V-cracked disks. The occurrence of ring failure within the reaction wood-containing disks of walnut, pine, and elm was almost completely prevented by the drying schedule, but a significant correlation was observed between the pith eccentricity and V-crack length in the compression wood-containing disks of pine. All other natural defects, i.e., scar in cherry, bark pocket, double or triple pithing in walnut and elm, sound knots in pine, and roundness deviation, exhibited no statistically significant effect (p > 0.05) on check formation.en_US
dc.description.sponsorshipCollege of Agriculture and Natural Resources at University of Tehranen_US
dc.description.sponsorshipThis work was financially supported by College of Agriculture and Natural Resources at University of Tehran. This study was carried out in Turkey during a research stay of the first author at Duzce University. We would like to thank Recep Sivrikaya Company in Duzce for allowing us to use the industrial RF/V kiln.en_US
dc.identifier.doi10.1080/07373937.2020.1833214
dc.identifier.issn0737-3937
dc.identifier.issn1532-2300
dc.identifier.scopus2-s2.0-85092777335en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1080/07373937.2020.1833214
dc.identifier.urihttps://hdl.handle.net/20.500.12684/10664
dc.identifier.wosWOS:000579695500001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofDrying Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectWood disken_US
dc.subjectradiofrequency-vacuum dryingen_US
dc.subjectinherent defectsen_US
dc.subjectcheck formationen_US
dc.subjectTangential Rheological Propertiesen_US
dc.subjectShrinkage Anisotropyen_US
dc.subjectMoisture-Contenten_US
dc.subjectStressen_US
dc.subjectSapwooden_US
dc.subjectStrainen_US
dc.subjectLumberen_US
dc.titleEfficiency of radiofrequency-vacuum (RF/V) technology for mixed-species drying of wood disks with inherent defectsen_US
dc.typeArticleen_US

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