室内挥发性有机化合物综合散发量及其特征

基于室内建筑污染源散发特性与汇效应机制分析,给出了建筑室内挥发性有机化合物（VOCs）综合散发量的计算模型,并进一步分析了材料内部扩散系数、气固界面分离系数和材料厚度对室内VOCs综合散发量的影响特征。研究结果表明,在近似稳定阶段室内VOCs综合散发量会随源材料内部扩散系数的增大而升高,而随源材料气固界面分离系数和材料厚度的增加而减小,且以源材料内部扩散系数的影响最为显著;同时,室内汇表面三类参数的增大均会使室内VOCs综合散发量降低;此外,在相同的环境参数条件下,室内VOCs综合散发量会因室内汇效应的存在而减小。

Indoor Comprehensive Emission Quantity and Its Characteristics of Volatile Organic Compounds

Model for calculating comprehensive emission quantity of volatile organic compounds（VOCs） was obtained based on the analysis of building material emission characteristics and indoor surface sink mechanism.The effects of factors such as material internal diffusion coefficient,gas-solid interface partition coefficient and thicknesses on comprehensive emission quantity of VOCs were discussed.The results showed that indoor comprehensive emission quantity of VOCs increased with increasing material internal diffusion coefficient but decreased with increasing gas-solid interface partition coefficient and thicknesses of which the effect of material internal diffusion coefficient was most significant.Meanwhile when the three parameters of indoor sink surface increased,the comprehensive emission quantity of VOCs would reduce.Furthermore,at same environmental conditions,existence of sink effect led to decrease of indoor comprehensive emission quantity of VOCs.