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林业科学 ›› 2004, Vol. 40 ›› Issue (1): 148-153.doi: 10.11707/j.1001-7488.20040124

• 论文及研究报告 • 上一篇    下一篇

木材干燥过程的热质迁移及其耦合关系

谢拥群 陈瑞英 杨庆贤 廖益强 张璧光   

  1. 福建农林大学材料工程学院,南平353001;北京林业大学材料科学与技术学院,北京100083
  • 收稿日期:2002-11-22 修回日期:1900-01-01 出版日期:2004-01-25 发布日期:2004-01-25

Heat and Mass Transfer and Coupling Effect in Wood Drying

Xie Yongqun,Chen Ruiying,Yang Qingxian,Liao Yiqiang,Zhang Biguang   

  1. The College of Material Engineering of Fujian Agriculture and Forestry University Nanping353001;Material Science and Technological College,Beijing Forestry UniversityBeijing100083
  • Received:2002-11-22 Revised:1900-01-01 Online:2004-01-25 Published:2004-01-25

摘要:

应用不可逆过程热力学研究木材干燥过程热质迁移及其耦合效应。根据不可逆过程的熵的产生率推导出含有耦合效应的传热传质关系式,提出湿度梯度不仅引起水分物质流,也引起热流,以及驱动水分物质流的力应是扩散势梯度。

关键词: 木材干燥, 热质迁移规律, 耦合效应, 不可逆过程热力学

Abstract:

The heat and mass transfer and coupling effect in wood drying were studied by applying the thermodynamics of irreversible processes. The relation of the heat and mass transfer and contained coupling effect were deduced in terms of the rates of entropy producing in irreversible processes. It might be sought that the moisture gradient not only leads to a water mass flux, but also gives rise to a heat flux. It is interesting to note that the force to drive water mass flux is the diffusivity gradient.

Key words: Wood drying, Heat and mass transfer laws, Coupling effect, Irreversible thermodynamics