微波真空干燥和传统干燥圆形石斛的特性

Shailendra Kumar
{"title":"微波真空干燥和传统干燥圆形石斛的特性","authors":"Shailendra Kumar","doi":"10.1016/j.bamboo.2024.100064","DOIUrl":null,"url":null,"abstract":"<div><p>Drying round bamboo is important to ensure its dimensional stability, to protect it from biological agents and for making high quality products. Conventional kiln drying of bamboo requires extended drying periods. Microwave drying of bamboo has been studied recently and has been reported to be a very fast method of drying. <em>Dendrocalamus asper</em> (Schult. &amp; Schult.f.) Backer is an important, large-sized bamboo, preferred for structural purposes and handicrafts manufacturing. However, it also shows a propensity to develop defects such as cracks during drying. In this study, eight culms of mature <em>D. asper</em> (about 3–3.5 years old) were felled and cut into two halves: upper half and lower half. Both parts were then cut into 900 mm long sections. Twenty sections each from the upper half were dried in a conventional kiln (CKD) at 50 °C and 70% RH; and another 20 sections from the upper half were subjected to microwave-vacuum drying (MWVD) at bamboo wall temperature 60–70 °C and 150 mbar pressure. Similarly, twenty sections each from the lower half bamboo sections were dried using CKD (50 °C, 70% RH), MWVD (bamboo wall at 60–80 °C, 150 mbar) and combination drying in which bamboo sections were first dried in CKD until the moisture content (MC%) dropped to below 30% (26%) and thereafter, further dried using MWVD. The time taken to dry the sections, MC% drop rate, defects, and energy consumption were analysed. MWVD took 12 h (upper half) to 20 h (bottom half) to dry the bamboo sections, whereas CKD took 12–15 days. Combination drying did not offer any major advantages. A lower number of defects were found in MWVD sections compared sections dried by CKD. On average, 3.78 units of electrical energy were consumed for the removal of 1 kg of water from bamboo during MWVD.</p></div>","PeriodicalId":100040,"journal":{"name":"Advances in Bamboo Science","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773139124000090/pdfft?md5=3c97a1fa2042d05a00ed7ae55c307e30&pid=1-s2.0-S2773139124000090-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Microwave vacuum and conventional drying characteristics of round Dendrocalamus asper\",\"authors\":\"Shailendra Kumar\",\"doi\":\"10.1016/j.bamboo.2024.100064\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Drying round bamboo is important to ensure its dimensional stability, to protect it from biological agents and for making high quality products. Conventional kiln drying of bamboo requires extended drying periods. Microwave drying of bamboo has been studied recently and has been reported to be a very fast method of drying. <em>Dendrocalamus asper</em> (Schult. &amp; Schult.f.) Backer is an important, large-sized bamboo, preferred for structural purposes and handicrafts manufacturing. However, it also shows a propensity to develop defects such as cracks during drying. In this study, eight culms of mature <em>D. asper</em> (about 3–3.5 years old) were felled and cut into two halves: upper half and lower half. Both parts were then cut into 900 mm long sections. Twenty sections each from the upper half were dried in a conventional kiln (CKD) at 50 °C and 70% RH; and another 20 sections from the upper half were subjected to microwave-vacuum drying (MWVD) at bamboo wall temperature 60–70 °C and 150 mbar pressure. Similarly, twenty sections each from the lower half bamboo sections were dried using CKD (50 °C, 70% RH), MWVD (bamboo wall at 60–80 °C, 150 mbar) and combination drying in which bamboo sections were first dried in CKD until the moisture content (MC%) dropped to below 30% (26%) and thereafter, further dried using MWVD. The time taken to dry the sections, MC% drop rate, defects, and energy consumption were analysed. MWVD took 12 h (upper half) to 20 h (bottom half) to dry the bamboo sections, whereas CKD took 12–15 days. Combination drying did not offer any major advantages. A lower number of defects were found in MWVD sections compared sections dried by CKD. On average, 3.78 units of electrical energy were consumed for the removal of 1 kg of water from bamboo during MWVD.</p></div>\",\"PeriodicalId\":100040,\"journal\":{\"name\":\"Advances in Bamboo Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-02-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2773139124000090/pdfft?md5=3c97a1fa2042d05a00ed7ae55c307e30&pid=1-s2.0-S2773139124000090-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Bamboo Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2773139124000090\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Bamboo Science","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2773139124000090","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

圆竹的干燥对于确保其尺寸稳定性、保护其不受生物制剂的影响以及制造高质量的产品非常重要。传统的窑干法需要较长的干燥时间。最近对竹子的微波干燥进行了研究,据报道这是一种非常快速的干燥方法。Dendrocalamus asper(Schult.然而,它也有在干燥过程中出现裂缝等缺陷的倾向。在这项研究中,我们砍伐了八根成熟竹秆(约 3-3.5 年),并将其切成两半:上半部分和下半部分。然后将两部分都切成 900 毫米长的部分。上半部分各 20 个切片在 50 °C 和 70% 相对湿度下在传统窑炉(CKD)中干燥;上半部分的另外 20 个切片在竹壁温度 60-70 °C 和 150 毫巴压力下进行微波真空干燥(MWVD)。同样,下半部分的 20 个竹节分别采用 CKD(50 °C,70%相对湿度)、MWVD(竹壁温度 60-80 °C,150 毫巴)和组合干燥法进行干燥,其中,竹节先在 CKD 中干燥,直到水分含量(MC%)降至 30%(26%)以下,然后再用 MWVD 进一步干燥。对竹片的干燥时间、MC% 下降率、缺陷和能耗进行了分析。MWVD 需要 12 小时(上半部分)到 20 小时(下半部分)来干燥竹节,而 CKD 则需要 12-15 天。组合干燥并没有带来任何重大优势。与 CKD 干燥的竹片相比,MWVD 干燥的竹片缺陷数量较少。在 MWVD 过程中,从竹材中去除 1 公斤水平均需要消耗 3.78 单位的电能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microwave vacuum and conventional drying characteristics of round Dendrocalamus asper

Drying round bamboo is important to ensure its dimensional stability, to protect it from biological agents and for making high quality products. Conventional kiln drying of bamboo requires extended drying periods. Microwave drying of bamboo has been studied recently and has been reported to be a very fast method of drying. Dendrocalamus asper (Schult. & Schult.f.) Backer is an important, large-sized bamboo, preferred for structural purposes and handicrafts manufacturing. However, it also shows a propensity to develop defects such as cracks during drying. In this study, eight culms of mature D. asper (about 3–3.5 years old) were felled and cut into two halves: upper half and lower half. Both parts were then cut into 900 mm long sections. Twenty sections each from the upper half were dried in a conventional kiln (CKD) at 50 °C and 70% RH; and another 20 sections from the upper half were subjected to microwave-vacuum drying (MWVD) at bamboo wall temperature 60–70 °C and 150 mbar pressure. Similarly, twenty sections each from the lower half bamboo sections were dried using CKD (50 °C, 70% RH), MWVD (bamboo wall at 60–80 °C, 150 mbar) and combination drying in which bamboo sections were first dried in CKD until the moisture content (MC%) dropped to below 30% (26%) and thereafter, further dried using MWVD. The time taken to dry the sections, MC% drop rate, defects, and energy consumption were analysed. MWVD took 12 h (upper half) to 20 h (bottom half) to dry the bamboo sections, whereas CKD took 12–15 days. Combination drying did not offer any major advantages. A lower number of defects were found in MWVD sections compared sections dried by CKD. On average, 3.78 units of electrical energy were consumed for the removal of 1 kg of water from bamboo during MWVD.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
0.90
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信