室内颗粒浓度影响因素的集总模型分析

为控制室内空气品质,研究了不同因素对室内颗粒浓度的影响规律,建立了基于质量平衡的室内颗粒集总参数模型。通过数值计算,分析了空调通风系统开启、关闭两种时段下,室外渗风量、回风量、新风量、穿透率、沉降率以及二次悬浮率等因素分别单独变化10%时,室内颗粒浓度的变化;比较了各因素对室内颗粒浓度的影响程度。结果表明:关闭空调通风系统时,沉降率对室内颗粒浓度的影响最大;开启空调通风系统时,回风量对室内颗粒浓度的影响最大。该结果对评测和控制室内空气品质有意义。

Analysis of factors influencing indoor particle concentration using the lumped parameter model

The influence of key factors affecting the indoor air quality was analyzed using a mass balance lumped parameter model to control the indoor air quality(IAQ) and to understand how these factors influence indoor particulate matter concentrations.The factors included the air infiltration rate,recirculated airflow rate,exchange airflow rate,penetration coefficient,deposition rate and resuspension rate.The degree of influence of these factors in rooms with and without ventilation was defined based on the indoor particulate matter concentrations when these factors are varied by 10%.The results show that the particle deposition rate is the most important factor affecting indoor particulate matter concentration without ventilation,while the recirculated airflow rate is the most important factor in ventilated rooms.