温度对木制家具中VOC散发关键参数的影响

Impact of Temperature on the Key Parameters of VOC From Wooden Furniture

室内家具散发的挥发性有机物(VOC)对空气质量有重要影响。家具中VOC的散发特性可由初始可散发浓度C_0、扩散系数D_m和分配系数K表征,因此测定三大关键参数是揭示散发机理的基础。此外,环境条件也是影响散发的重要因素。本文选用板式家具,首先建立了双层数值模型,然后提出了能够同时测定三大关键参数的多参数拟合法,并开展实验测试获得了典型VOC的关键参数值。同时以温度为变量条件,分析了温度对散发过程的影响规律。结果表明,随着温度的升高,D_m增大,K减小,C_0呈非单调变化。

The emissions of volatile organic compounds (VOC) from indoor furniture significantlyaffect the air quality. The emission behaviors of VOC from furniture can be characterized by theinitial emittable concentration C0, the diffusion coefficient Dm and the partition coefficient K. Therefore,determination of the three key parameters is the basis to explore the emission mechanism. Inaddition, environmental factors also take effect. In this study, panel furniture is selected, and atwo-layer numerical model is developed. Then, a multi-parameter regression method is proposed todetermine the three key parameters, and the key parameters of typical VOC are obtained by performingexperiments. Moreover, the influence of temperature on the emission process is analyzed.Results indicate that, with the increase of temperature, Dm increases, K decreases, and C0 showsnon-monotonic change.