室内空气环境的均匀性分析及数值模拟

Numerical simulation and uniformity analysis of indoor air quality

该文引入体积分数分析法对室内空气质量的不均匀性进行研究。传统参数对室内空气质量的分析基本上基于示踪气体的平均浓度,而平均化的处理掩盖了室内空气质量分布的不均匀性。对具有不同气体浓度或者其他物理量的空气微团在整个空间中的体积分数的分布状况进行分析,并结合传统参数,能反映出空气质量在室内的分布均匀程度。文中对体积分数法的可靠性与实用性进行了验证,并应用于自然通风条件下小户型套房室内空气环境的模拟与分析。

Definition of most traditional parameters used in indoor air environment analysis is based on average concentration of tracer gas. The averaging process of traditional parameters can not indicate the extent of non-uniformity of real conditions. In this paper, a novel approach named volume fraction analysis for analyzing the non-uniformity of indoor air quality is presented. Two variables, which are called volume fraction and spatial occupation rate, are defined to express the degree of non-uniformity of air quality. After the new analysis method had been validated, it was applied in a numerical analysis of the air quality of a small apartment.