• Vol 7, No 5 (2016)
  • Industrial Engineering

Effect of Temperature and Vacuum on the Drying Rate and Various Parameters of Wood Samples, using an Indigenously Designed and Developed Vacuum Drying System

Talib Hussain, Muhammad Shamraiz, Sami Ullah Abrar


Publish at : 29 Jul 2016 - 00:00
IJtech : IJtech Vol 7, No 5 (2016)
DOI : https://doi.org/10.14716/ijtech.v7i5.2135

Cite this article as:
Hussain, T.., & Shamraiz, M.Abrar, S.U.., 2016. Effect of Temperature and Vacuum on the Drying Rate and Various Parameters of Wood Samples, using an Indigenously Designed and Developed Vacuum Drying System. International Journal of Technology. Volume 7(5), pp.795-809
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Talib Hussain National Institute of Vacuum Science and Technology (NINVAST), NCP Complex, Shahdara Valley Road, Post Box No. 3125 Islamabad
Muhammad Shamraiz National Institute of Vacuum Science and Technology (NINVAST), NCP Complex, Shahdara Valley Road, Post Box No. 3125 Islamabad
Sami Ullah Abrar National Institute of Vacuum Science and Technology (NINVAST), NCP Complex, Shahdara Valley Road, Post Box No. 3125 Islamabad
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Abstract

A vacuum drying system is being designed and developed at National Institute of Vacuum Science & Technology (NINVAST) to dry various materials under vacuum conditions. Its performance and capabilities are tested by carrying out different experiments on green (freshly cut) wood samples of Poplar and Eucalyptus with dimensions of 990.6 mm x 76.2 mm x 25.4 mm and 469.9 mm x 50.8 mm x 25.4 mm, respectively. These samples were dried from green moisture content (MC) 78% to 10% by this system at ultimate vacuum of about 1.6 x 103 pascal and at a temperature ranging from 35oC to 55oC for about 20 hrs. Drying quality tests included: prong test, warp measurement, surface checking and moisture content measurement, which were all performed. The resulting wood samples showed no dislocation and no excessive stress buildup. If compared to ordinary drying process, the vacuum drying is rapid and the drying rate increases with rise in temperature. The designed system is beneficial for commercial use.


oisture content; Quality tests; Vacuum system; Warp measurement