某地铁屏蔽门系统岛式站台的室内环境分析

Analysis of thermal comfort of island platform in a subway screen door system

本文采用专门面向HVAC领域的Airpak软件对某地铁站台环境进行了三维数值模拟,得到了地铁站台温度场、速度场、PMV-PPD及空气龄的分布。在分析室内流场分布的基础上,基于人体舒适性指标PMV-PPD与衡量空气品质指标空气龄,对室内气流组织及空气品质进行预测与评价。模拟结果表明:站台区域温度场,速度场纵向梯度变化小,比较均匀。热感觉表现为微凉或凉。但右侧区域的平均空气龄最高达1 460 s,该处气流几乎停滞,通风换气效果较差。

A three-dimensional numerical simulation of the thermal environment of a subway platform was carried out using Airpak software.The distribution of temperature,velocity,PMV-PPD and air age of the subway platform were obtained.Based on the analysis of the indoor flow field distribution,based on the human body thermal comfort index PMV-PPD and measuring the air quality index air age,indoor airflow organization and air quality were predicted and evaluated.The simulating results show that the vertical gradient of the temperature field and the velocity field in the platform area is small and relatively uniform.The thermal sensation is a bit cool or cool.However,the average air age in the right-hand area was up to 1460 s,where the air flow was almost stagnant and the ventilation and ventilation effects were poor.