The effect of compressive load on the moisture content of oak blocks during radio-frequency/vacuum drying

被引：1

作者：

Li, Chengyuan ^{[1
]}

Lee, Nam-Ho ^{[2
]}

机构：

[1] Beihua Univ, Dept Wood Sci & Technol, Jilin, Jilin Province, Peoples R China

[2] Chonbuk Natl Univ, Dept Forest Prod, Chonju, Chonbuk, South Korea

来源：

FOREST PRODUCTS JOURNAL | 2008年 / 58卷 / 04期

关键词：

D O I：

暂无

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

This study was conducted to investigate the effect of a compressive load of 0.092 MPa on the moisture content (MC) of oak (Quercus variabilis) blocks with sides of 40 mm in each direction under vacuum combined with radio-frequency heating. The largest difference (14%) in the MC between the load-free and the loaded specimens was found for the specimens loaded on their tangential section when drying time was 8 hours, 10 percent more than that found after a drying time of 40 hours. Thus, wood with different directions of grains, being compressively loaded, should be dried separately or unidirectionally during radio-frequency/vacuum drying in order to shorten the drying period and/or reduce the variation in MC.

引用

页码：34 / 38

页数：5

共 12 条

[1]

Armstrong L. D., 1972, Wood Science, V5, P81

[2] Generation of radial growth stresses in the big rays of konara oak trees [J].

Burgert, I ;

Okuyama, T ;

Yamamoto, H .

JOURNAL OF WOOD SCIENCE, 2003, 49 (02) :131-134

[3]

HSU NN, 1974, WOOD SCI, V7, P48

[4]

Kubler H., 1987, FOR PROD ABSTR, V10, P74

[5]

LAMB FM, 1993, VAC DRY WOOD 93 SLOV, P251

[6]

Li CY, 2004, WOOD FIBER SCI, V36, P9

[7]

LIBBY TB, 1967, J I WOOD SCI, P54

[8]

Naderi N, 1997, WOOD FIBER SCI, V29, P340

[9] Turbulence in the wood system with small and short stresses [J].

Negi, A .

WOOD SCIENCE AND TECHNOLOGY, 1999, 33 (03) :209-214

[10]

SKAAR C, 1988, WOOD WATER RELATIONS, P153

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