頁籤選單縮合
| 題 名 | 微波乾燥測定木材含水率可行性之研究=Feasibility Study of Wood moisture Content Determination using Microwave Drying |
|---|---|
| 作 者 | 熊如珍; 翟思湧; | 書刊名 | 臺灣林業科學 |
| 卷 期 | 12:2 1997.06[民86.06] |
| 頁 次 | 頁203-210 |
| 分類號 | 436.186 |
| 關鍵詞 | 微波乾燥; 烘箱乾燥; 木材含水率; 檸檬桉; 香楠; Microwave drying; Oven drying; Wood moisture content; Lemon-scented gum; Incense machilus; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究旨在探討微波乾燥測定木材含水率之可行性,特以檸檬桉 (Eucalyptus citriodora) 與香楠 (Machilus zuihoensis) 為試材, 就微波烘箱照射與傳統烘箱乾燥, 分別測計其生材含水率、氣乾材含水率以及纖維飽和點含水率。試驗結果顯示:自生材或氣 乾材乾燥至絕乾狀態, 若經由傳統烘箱 (103 ± 2 ℃ ) 乾燥,檸檬桉試材需要長達 3 天 的時間, 香楠試材則需 24 小時; 若改採微波烘箱照射時,檸檬桉試材僅需 2 (氣乾材 ) 或 4 分鐘 (生材 ),香楠試材亦僅 90 秒鐘 (氣乾材 ) 或 3 分鐘 (生材 )。 香楠心材纖 維飽和點含水率之測定, 經由收縮率所推算者 (傳統烘箱者 28.36%, 微波烘箱照射者 28.98%, 費時 2 週以上 ), 與依據微波烘箱照射之乾燥速率所推定者 (28.60%,費時 60 秒鐘 ),二處理間之結果一致,並無差異。 |
| 英文摘要 | This study evaluates the feasibility of wood moisture content determination using microwave drying instead of conventional oven drying. Lemon-scented gum (Eucalyptus citriodora) and incense machilus (Machilus zuihoensis) were used for this study. Treatments of wood drying were: A (conventional oven drying) and B (Microwave oven drying). The moisture contents of green and air-dried specimens were tested for lemon-scented gum and incense machilus. The moisture content at the fiber saturation point was tested only for incense machilus. The results of this study indicate that: 1.The times of the wood moisture content determination using microwave drying (treatment B) for lemon-scented gum were 2 min (air-dried wood) or 4 min (green wood), and for incense machilus were 1.5 min(air-dried wood) or 3 min (green wood). 2. For incense machilus, the differences of the moisture contents at the fiber saturation point (calculated from the shrinkage) were not significant between treatments A and B. 3.For incense machilus heartwood, the time (determined for the moisture content at the fiber saturation point) obtained from the drying rate for treatment B was a few minutes, while that for the shrinkage for treatment A was more than 2 weeks. 4.The application of microwave drying reduces the drying time for wood moisture content determination as compared as compared with using conventional oven drying. |
本系統中英文摘要資訊取自各篇刊載內容。