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http://dx.doi.org/10.5658/WOOD.2014.42.4.407

Moisture Content Change and Heat Distribution Characteristics of Veneer Heated by Microwave  

Shin, Ki-Hoon (Department of Architectural Engineering, College of Architecture & Design, Tongmyong University)
Suh, Jin-Suk (Division of Wood Processing, Department of Forest Products, Korea Forest Research Institute)
Park, Cheul-Woo (Department of Research and Development, ISONE Industry)
Lim, Nam-Gi (Department of Architectural Engineering, College of Architecture & Design, Tongmyong University)
Publication Information
Journal of the Korean Wood Science and Technology / v.42, no.4, 2014 , pp. 407-419 More about this Journal
Abstract
The analysis of shape before and after heating, Surface moisture content, Moisture weight change and surface heat distribution by fixed type microwave heating in forms of flat veneer and veneer roll of Korean pine, pitch pine, larch and yellow poplar was conducted. The results were as follows: In case of flat veneer, the quality after microwave heating was comparatively good, but it was somewhat warped. These phenomena may be due to transformation by nonuniform drying stress and stronger effect of local irradiation on the veneers when heating veneer owing to the characteristics of fixed type microwave equipment. In case of the features of roll-shaped veneer heated by microwave, the quality after heating was comprehensively excellent. Especially there was no warping unlike flat veneer. Heat distribution and diffusion were also very stable for roll-shaped veneer and such heat distribution had much influence on surface moisture content and moisture weight loss. Accordingly, the veneer roll would show sufficient drying efficiency in fixed type microwave equipment through a scrutinized examination on generating power and irradiation time according to species and thickness of veneer.
Keywords
fixed type microwave heating; flat veneer; veneer roll; drying efficiency;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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