重工业区室内外细颗粒物PM_(2.5)相关性分析

Correlation Analysis of Indoor and Outdoor Fine Particles PM_(2.5) in Heavy Industrial Zone

目的研究重工业城市住宅在夏季开窗条件下,室外细颗粒物PM_(2.5)对室内空气品质的影响,数值模拟得到细颗粒物PM_(2.5)的质量浓度、速度、温度分布云图及粒子轨迹.方法通过采用气溶胶检测仪对室内外细颗粒物PM_(2.5)污染物质量浓度进行实测,使用SPSS软件对测试得到的细颗粒物PM_(2.5)质量浓度进行拟合,并运用FLUENT模拟软件对室内细颗粒物运移及分布情况进行模拟分析.结果位于重工业厂矿下风侧交通主干线一侧的A房间的室内与室外细颗粒物质量浓度的比值(I/O)小于1,受室外环境的影响较大;位于重工业厂矿下风侧小区内部的B房间的I/O大于1,说明受室内细颗粒物染物污的影响较大.并且两房间室内外细颗粒物具有较强的二次相关性,相关系数分别为0.920 77、0.941 11.结论室内PM_(2.5)质量浓度随室外细颗粒物质量浓度增加而升高.建立的室内外细颗粒物PM_(2.5)质量浓度相关性模型,可以分析室内外颗粒物浓度的变化特征.

In this paper under the condition of a certain residential summer windowin heavy industry city,the outdoor fine particles PM_（2.5） has an impact on indoor air quality. The concentration,velocity,temperature distribution cloud and particle trajectory of fine particulate PM_（2.5）were obtained by numerical simulation. Indoor and outdoor fine particulate matter PM_（2.5） pollutant concentration was measured through the adoption of aerosol detector. PM_（2.5） mass concentration of the fine particles was fit by SPSS software. Indoor fine particle migration and distribution were simulated by FLUENT simulation software. The ratio of indoor and outdoor fine particulate mass concentration（ I/O） is less than 1 in the room of A room on the side of the main road of heavy industry,a grea-ter impact by the outdoor environment,and I/O is greater than 1 in B room in the lower wind side area of heavy industry,which is influenced by indoor fine particulate matter pollution. And the indoor and outdoor fine particles of above two groups have a strong quadratic correlation,the correlation coefficients were 0. 920 77,0. 941 11. Indoor PM_（2.5）levels increased with the concentration of fine particulate matter outside. The correlation model of fine particulate PM_（2.5）concentration in indoor and outdoor areas was established to analyze the variation characteristics of particulates in indoor and outdoor areas.