- 期刊
木材減濕乾燥基準表之訂定3cm杉木
Development of a Dehumidification Drying Schedule for 3cm China Fir
並列摘要
The objective of this study was to develop a dehumidification drying schedule for 3cm China Fir. Seventy-two 180cm-long bolts, ranging from 17 to 39cm in diameter, cut from eighteen 35-year-old trees in middle Taiwan, were used for this study. The bolts were then sawed into 3cm test boards. During cutting, each four consecutive boards were divided into four groups and sealed in plastic bags untill the time of drying. Each group of the test boards was dehumidification-kiln-dried by a different drying schedule (Table 2.) from green to a final moisture content of about 10%, and then compared primarily for drying rate and defects. Moisture content during drying was monitored by standard sample board technique. Results of this research are shown as follows: 1. Schedule S-4 (Table 2.) can be efficiently applied to dry 3cm China Fir, and the drying rate is about 0.38% MC/hr.. 2. The dehumidification dry kiln is capable of drying 3cm China Fir from green to a final moisture content below 10 percent within 10 days. 3. The relationship between moisture content and shrinkage is in a curvilinear correlation. The percent tangential shrinkage is about twice as much as radial does.
延伸閱讀
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