| 摘要: |
| 为探索作为建筑填充材的竹原纤维(BF)热湿物理性质及其相互作用规律，采用平衡含水率u值测试、吸放湿速率U值测试和导热系数λ值测试，以及蓄热系数S值和热惰性指标D值的推算，进行了竹原纤维热湿关联性研究.结果表明：u，U和λ值与环境相对湿度φ值之间存在指数函数关系，可以采用Y=a·eb·φ+c的一般方程进行描述；在测试范围内BF的等温吸放湿u φ曲线在φ为854%~963%阶段、吸放湿速率U φ曲线在φ为75%~95%阶段快速增大；填充密度ρ为70~170kg/m3的BF干燥λ值为00423~00465W/(m·K)，潮湿λ值随环境相对湿度φ值的提高而显著增大，且增大速率与其自身填充密度呈正相关关系；增大u值和减小U值均有利于改善BF的热工性能，具体表现在增大u值可提高BF的S值和D值，而减小U值可大幅提高BF的热工稳定性. |
| 关键词: 竹原纤维 平衡含水率 吸放湿速率 导热系数 蓄热系数 热惰性指标 |
| DOI：103969/j.issn.1007 9629201802013 |
| 分类号: |
| 基金项目:广州市科技计划项目(201707020041)；国家自然科学基金资助项目(51138004)；国家建设高水平大学公派研究生项目(201506150017) |
|
| Impact of Hygric Properties on Thermal Performance of Bamboo Fiber asBuilding Filler |
|
HUANG Zujian1, SUN Yimin1, MUSSO Florian2
|
|
1.School of Architecture, South China University of Technology, Guangzhou 510640, China;2.Chair of Building Construction and Material Science, Technical Universityof Munich, Munich 80333, Germany
|
| Abstract: |
| To determine the hygrothermal properties of natural bamboo fiber(BF) as a building filler material and the hygric thermal interaction rule, associated studies were carried out, including test items for equilibrium moisture content(u value), moisture absorption and desorption rate(U value) and thermal conductivity(λ value), and calculation items for thermal storage coefficient(S value) and index of thermal inertia(D value). Results show that there are exponential relation between u φ, U φ and λ φ that can generally be expressed in the form Y=a·eb·φ+c; within the range of the test, the u φ curve and U φ curve grow rapidly when φ is 854%963% and φ is 75%95% respectively; the dry λ values of BF with bulk density ρ between 70170kg/m3 are 0042 30046 5 W/(m·K); the wet λ values increase significantly with the rise of φ, and the growth rate is in positive correlation with the ρ values. The increase of u value and the decrease of U value can improve the thermal performance. In particular, increasing the u value can raise the S value and D value of BF, and reducing the U value can significantly improve the thermal stability of BF. |
| Key words: natural bamboo fiber equilibrium moisture content moisture absorption and desorption rate thermal conductivity thermal storage coefficient index of thermal inertia |
