Preparation of a Kiln Drying Schedule for Poplar (Populus nigra) Lumber of 5 cm Thickness

Document Type : Research Paper

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Abstract

In order to establish a kiln drying schedule for Poplar (Populus nigra) lumbers of 5 cm thickness commercially cut from Taleghan region, three schedules, namely T8-F4, T8-F5 and T9-F4 were adopted to dry the lumbers to the final moisture content of 11 ± 2%.  Dry bulb temperatures for the schedules were adjusted at 54, 54 and 60 °C, while the final dry-bulb temperatures were adjusted at 82, 82 and 71 °C, respectively. The severity of surface, internal checks and warp in the lumbers were measured before and after the drying process and quality control methods were used to analyze wood defects. Results indicated that drying of Poplar lumber using each of the three schedules was satisfactory; however, the third schedule (T9-F4) resulted in better drying quality than did the others. Also, equalizing of lumbers for 24h is recommended.

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References

1- ابراهیمی، قنبر، 1362، چوب­خشک­کنی در هوای آزاد، انتشارات علمی و فنی، 253 صفحه.
2- ابراهیمی، قنبر، 1370، فرایند انتقال سیال در چوب، انتشارات دانشگاه تهران، 290 صفحه.
3- ابراهیمی، قنبر، فائزی­پور، مهدی، 1382، چوب­خشک­کنی در کوره، انتشارات دانشگاه تهران، چاپ دوم، 460 صفحه.
4- چاوش­اکبری، مزدا، 1379، تدوین برنامه خشک­کنی چوب بلوط به ضخامت 5 سانتی­متر در کوره، پایان‌نامه کارشناسی­ارشد، دانشگاه آزاد اسلامی.
5- خرسنداعلم، مصطفی، 1380، تدوین برنامه خشک­کنی چوب افرا پلت به ضخامت 5 سانتی­متر، دانشگاه تربیت مدرس.
6- مدهوشی، محراب،1375، تدوین برنامه خشک­کنی چوب راش به ضخامت 5 سانتی­متر در کوره، پایان‌نامه کارشناسی­ارشد، دانشگاه تربیت مدرس.
7- نجفی، هومن، 1378، تدوین برنامه خشک­کنی چوب بلوط به ضخامت 32 میلی­متر در کوره، پایان­نامه کارشناسی­ارشد، دانشگاه آزاد اسلامی.
8- Ebrahimi, Ghanbar, 1362, Air Drying of Lumber, Scientific and Technical Press, 253 Pages. (In Persian)
9- Ebrahimi, Ghanbar, 1370, Transport Processes in Wood, Tehran University Publications, 290 Pages. (In Persian)
10- Ebrahimi, Ghanbar, Faezipoor, Mehdi, 1382, Kiln Drying Lumber, Tehran University Publications, Second Edition, 460 Pages. (In Persian)
11- Chavoshakbari, Mazda, 1379, Establishing kiln drying schedule for Oak lumber of 5 cm in thickness, Thesis Presented for the Degree of Master of Science, Islamic Azad University. (In Persian)
12- Khorsandalam, Mostafa, 1380, Establishing kiln drying schedule for Maple lumber of 5 cm in thickness, Thesis Presented for the Degree of Master of Science, Tarbiat Modares University. (In Persian)
13- Madhooshi, Mehrab, 1375, Establishing kiln drying schedule for Beech lumber of 5 cm in thickness, Thesis Presented for the Degree of Master of Science, Tarbiat Modares University. (In Persian)
14- Najafi, Hooman, 1378, Establishing kiln drying schedule for Oak lumber of 32 mm in thickness, Thesis Presented for the Degree of Master of Science, Tarbiat Modares University. (In Persian)
Iranian Journal of Wood and Paper Industries
Volume 1, Issue 2 - Serial Number 2
December 2011
Pages 13-25

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