通风模式对室内颗粒污染物扩散分布的影响  

Influence of ventilation mode on the dispersion of indoor particles

作　　者：李琳琳 马鸣宇 李政钊 李航[2] 何国雳 罗杨[1] LI Linlin;MA Mingyu;LI Zhengzhao;LI Hang;HE Guoli;LUO Yang(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]上海理工大学健康科学与工程学院,上海200093

出　　处：《能源研究与信息》2024年第3期134-144,共11页Energy Research and Information

基　　金：上海市青年科技扬帆计划资助项目(20YF1432900);国家自然科学青年基金资助项目(12202279)。

摘　　要：基于欧拉-拉格朗日法对比分析了置换通风(DV)和地板送风(UFAD)模式下室内速度、温度和污染物浓度分布。模拟中考虑了夏季室内环境在不同送风速度(0.3、0.5 m·s^(-1))和送风温度(20、22℃)下的气流运动及颗粒物扩散情况。结果表明,当送风速度较大时,两种模式下系统的颗粒去除能力均有所提高,但送风速度的变化对DV模式下系统性能的影响比对UFAD模式下性能的影响显著。此外,在相同的运行条件下,DV模式下室内人员呼吸高度处的颗粒物质量浓度均低于UFAD模式下的,但送风温度的改变对两种模式下颗粒物质量浓度的影响均不明显。The comparative analysis of velocity,temperature,and pollutant concentration distribution under displacement ventilation(DV)and underfloor air distribution(UFAD)systems were performed using Eulerian-Lagrangian method.Meanwhile,effect of velocity(0.3 and 0.5 m·s^(−1))and temperatur(20,22℃)of air supply on the indoor airflow and particle dispersion in summer were studied in the simulation.Results show that when larger air supply speed increases the particle removal capability of both systems,while the effect on the performance of DV system is more significant than that of UFAD system.Furthermore,at the same operation conditions,the particle concertation at the respiratory height is lower under the DV system than that under the UFAD system.However,the particle concentration dose not changed significantly under the two ventilation systems when the supply air temperature changes.

关 键 词：置换通风 人体微环境 颗粒物浓度 地板送风 

分 类 号：X524[环境科学与工程—环境工程]