球体吸收法测量建筑材料水蒸气扩散系数的研究

doi:10.3969/j.issn.1000-1158.2019.05.13

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摘要以典型多孔建筑材料加气混凝土为例,搭建了球体吸收法测量水蒸气扩散系数的实验台,通过不确定度分析及方法验证,探究了球体吸收法测量建筑材料水蒸气扩散系数的可行性与准确性。得到结论:球体吸收法适用于测量多孔建筑材料的水蒸气扩散系数,且具有测量时间短、测量结果较准确等优点;对于加气混凝土来说,使用半时法计算水蒸气扩散系数比使用矩量法更加准确;加气混凝土的水蒸气扩散系数在相对湿度45%～80%之间逐渐增大,而在更高湿度中,由于液态水的出现,使得水蒸气扩散系数逐渐减小。

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	王友辉
	田帅奇
	马梦晨
	王诗印
	徐旭
	范利武
	俞自涛

关键词 ：计量学, 水蒸气扩散系数, 加气混凝土, 球体吸收法, 不确定度

Abstract：An experimental approach was built for measuring the diffusion coefficient of water vapor by a spherical absorption method, taking the typical porous building material aerated concrete as an example. Meanwhile, through uncertainty analysis and method verification, the feasibility and accuracy for measuring the water vapor diffusion coefficient of building materials were investigated. It is concluded that the spherical absorption method is suitable for measuring the water vapor diffusion coefficient of porous building materials and it has the advantages of short time and accurate results. For aerated concrete, the half-time method is more accurate than transient techniques in calculating water vapor diffusion coefficient. The water vapor diffusion coefficient of aerated concrete gradually increases between 45% and 80% relative humidity. While at higher humidity, water vapor diffusion coefficient gradually decreases due to the appearance of liquid water.

Key words： metrology water vapor diffusion coefficients aerated concrete spherical absorption method measurement uncertainty

收稿日期: 2018-05-31 发布日期: 2019-09-01

PACS:

TB94

基金资助:国家自然科学基金(51378482);“十三五”国家重点研发计划(2016YFC0700302-02);浙江省基础公益研究计划(LGG18F050001)

通讯作者: 徐旭(1974-),女,浙江衢州人,中国计量大学教授、硕士生导师,主要从事传热传质等方面的教学和研究工作。 Email: xuxu@cjlu.edu.cn E-mail: xuxu@cjlu.edu.cn

作者简介: 王友辉(1994-),男,山东潍坊人,中国计量大学硕士研究生,主要研究方向为多孔建筑材料的热湿物性测量、建筑墙体的热湿耦合传递分析等。Email: s1602080452@stu.cjlu.edu.cn

引用本文:

王友辉,田帅奇,马梦晨,王诗印,徐旭,范利武,俞自涛. 球体吸收法测量建筑材料水蒸气扩散系数的研究[J]. 计量学报, 2019, 40(5): 816-822.
WANG You-hui,TIAN Shuai-qi,MA Meng-chen,WANG Shi-yin,XU Xu, FAN Li-wu,YU Zi-tao. Study on Measurement of Water Vapor Diffusion Coefficient of Building Materials by Spherical Absorption Method. Acta Metrologica Sinica, 2019, 40(5): 816-822.

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［1］陈会娟, 陈滨. 多孔建筑材料热湿传递过程的研究［J］. 暖通空调, 2004, 34(11): 24-29.
Chen Hj, Chen B.Heat and mass transfer in porous building materials: a review ［J］. Journal of HV & AC, 2004, 34(11): 24-29.
［2］Roels S, Talukdar P, James C, et al. Reliability of material data measurements for hygroscopic buffering ［J］. International Journal of Heat & Mass Transfer, 2010, 53(23-24): 5355-5363.
［3］ISO12572: 2001(E) Hygrothermal performance of building materials and products Determination of water vapour transmission properties ［S］. 2001.
［4］ASTM E96-00, Standard Test Method for Water Vapor Transmission of Materials ［S］. 2000.
［5］Pavlík Z, umár J, Pavlíková M, et al.A Boltzmann transformation method for investigation of water vapor transport in building materials ［J］. Journal of Building Physics, 2012, 35(3): 213-223.
［6］易思阳, 金虹庆, 范利武, 等. 多孔建筑材料水蒸气扩散系数的瞬态测试方法［J］. 浙江大学学报(工学版), 2016, 50(1): 16-20.
Yi S Y, Jin H Q, Fan L W, et al. Transient determination of water vapor diffusion coefficient of porous building materials ［J］. Journal of Zhejiang University(Engineering Science), 2016, 50(1): 16-20.
［7］Arfvidsson J, Cunningham M J. A transient technique for determining diffusion coefficients in hygroscopic materials ［J］. Building & Environment, 2000, 35(3): 239-249.
［8］Delgado J M P Q, Ramos N M M, Freitas V P D. Application of hybrid and moment methods to the measurement of moisture diffusion coefficients of building materials ［J］. Heat & Mass Transfer, 2011, 47(11): 1491-1498.
［9］王斐, 邵晓红, 汪文川, 等. CH4和CO2在活性炭微球内扩散系数的测定［J］. 化工学报, 2006, 57(8): 1891-1896.
Wang F, Shao X H, Wang W C, et al. Measurements of diffusion coefficients for methane and carbon dioxide in activated meso-carbon microbeads ［J］. Journal of Chemical Industry and Engineering, 2006, 57(8): 1891-1896.
［10］Crank J. The mathematics of diffusion ［M］. Oxford: Clarendon Press, 1956.
［11］Felder R M. Estimation of gas transport coefficients from differential permeation, integral permeation, and sorption rate data ［J］. Journal of Membrane Science, 1978, 3(1): 15-27.
［12］田帅奇, 王鹏程, 仉庆宇, 等. 加气混凝土水蒸气有效扩散系数的稳态实验研究［C］//高等学校工程热物理第二十三届全国学术会议. 成都, 2017.
［13］GB 11968蒸压加气混凝土砌块［S］. 2006.
［14］孙抱真, 李广才, 贾传玖.蒸压加气混凝土水化产物的定量分析方法［J］. 硅酸盐学报, 1982, 10(3): 119-125.
Sun B Z, Li G C, Jia C J. Quantitative analysis method for autoclaved product of autoclaved aerated concrete ［J］. Journal of silicate, 1982, 10(3): 119-125.
［15］殳伟群.动态测量不确定度问题初探［J］. 计量学报, 2003, 24(3): 245-249.
Shu W Q. A Study of the Dynamic Measurement Uncertainty ［J］. Acta Metrologica Sinica, 2003, 24(3): 245-249.
［16］沈昱明, 张进明. 对流量测量不确定度评估中若干名词术语的看法［J］. 计量学报, 2016, 37(1): 109-112.
Shen Y M, Zhang J M. Perspective on Some Terminology of Evaluation of Flow Measurement Uncertainty ［J］. Acta Metrologica Sinica, 2016, 37(1): 109-112.
［17］崔骊水, 李鹏, 邱丽荣,等.微风速标准装置的建立和热线风速仪校准方法的实验研究［J］. 计量学报, 2018, 39(3): 289-293.
Cui L S, Li P, Qiu L R, et al. Experiment Investigation on Calibration of Hot Wire Anemometer Based on Low Air Speed Reference Facility.［J］. Acta Metrologica Sinica, 2018, 39(3): 289-293.
［18］倪育才. 实用测量不确定度评定［M］. 5版. 中国质检出版社, 2016.
［19］孟海凤, 熊利民, 张俊超, 等. 太阳电池光电性能参数校准方法研究［J］. 计量学报, 2017, 38(5): 567-570.
Meng H F, Xiong L M, Zhang J C, et al.［J］. Research on the Photo-electric Characteristic Calibration of Solar Cells ［J］. Acta Metrologica Sinica, 2017, 38(5): 567-570.
［20］Barrett E P, Joyner L G, Halenda P P. The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms ［J］. J am chem soc, 1951, 73(1): 373-380.
［21］冯驰, 冯雅, 孟庆林. 加气混凝土蒸汽渗透系数的变物性取值方法［J］. 土木建筑与环境工程, 2013, 35(5): 132-136.
Feng C, Feng Y, Meng Q L. Approach to Determine Value of Variable Vapor Permeability of Autoclaved Aerated Concrete ［J］. Journal of Civil, Architectural & Environmental Engineering, 2013, 35(5): 132-136.