雾霾条件下中小学教室内空气质量的模拟与分析

Simulation and Analysis of Air Quality in Primary and Secondary Classrooms under Fog and Haze Conditions

采用模拟和分析的方法研究了室内二氧化碳、PM2.5浓度的变化规律,提出了雾霾天气下中小学教室内空气质量的改善措施,为中小学教室内新风系统的设计提供了理论依据。利用Airpak软件依据调研教室建立教室模型,运用Gambit软件对模型进行网格划分,选择k-ε两方程模型为湍流模型,模拟教室在多种工况条件下,室内温湿度、二氧化碳浓度及PM2.5浓度分布规律,在模拟的7种风口位置中,给出了最佳的气流组织形式。

In this paper, the changes of indoor carbon dioxide and PM2.5 concentration are studied by means of simulation and analysis, and the measures for improving the air quality in primary and middle school classrooms under haze weather are put forward, which provides a theoretical basis for the design of new air system in primary and middle school classrooms. Using the Airpak software to establish the classroom model based on the research classroom, the model is meshed with Gambit software, and the k-ε two equation model is selected as the turbulence model. The indoor temperature, humidity, carbon dioxide concentration and the distribution of PM2.5 concentration are simulated under various working conditions. In the simulated seven kinds of tuyere positions, the model is given, The best airflow organization form and the fresh air supply temperature satisfying the indoor comfort requirement.