摘要
在地铁车站屏蔽门开启过程中,隧道与站台之间存在着强烈的气流和热量交换,影响站台热环境。使用FLUENT软件建立地铁车站公共区顶棚弥散送风的仿真模型,模拟分析了屏蔽门开启时产生的漏风对站台公共区弥散送风效果的影响。结果表明:屏蔽门关闭时,站台空间温度分布均匀,不同平面高度温度低于设计温度,可以实现良好的通风效果;当地铁列车停站仅送风侧和仅回风侧屏蔽门开启时,站台温度分布均呈现靠近进站端温度较高,靠近出站端温度较低;随着屏蔽门开启时间的增加,站台在高度方向上的温度均有所升高;仅送风侧屏蔽门开启和仅回风侧屏蔽门开启时,站台平均温度恢复到屏蔽门未打开时的稳定状态所需时长分别为373 s和305 s。探究了顶棚弥散通风方式下,屏蔽门开启状态下产生的渗漏风对地铁站台热环境的影响以及显著程度,为地铁站台环控系统设计及热环境营造提供了参考。
In the process of opening the screen door of subway station,there exists strong airflow and heat exchange between the tunnel and the platform,which affects the thermal environment of the platform.In this paper,FLUENT software is used to establish a simulation model of diffuse ceiling ventilation(DCV)in the common area of subway stations,and the influence of the leakage air generated when the screen door is opened on the diffuse ventilation effect in the common area of platforms is simulated and analyzed.The results show that when the screen door is closed,the temperature distribution of the platform space is uniform,and the temperature of different plane heights is less than the design temperature 28℃,and the ventilation efficiency is 1.42,which can realize a good ventilation effect.When the screen doors are opened only on the air supply side and the air return side,the temperature distribution of the platform shows that the temperature near the inbound end is higher,accounting for about 1/3 of the entire subway platform,reaching 33℃;the temperature near the outbound end is lower,and the average temperature of the platform increases by about 1℃.With the increase of the opening time of the screen door,the temperature of the platform in the height direction increases.When the screen door is opened for 30 seconds,the ventilation efficiency of the screen door only on the supply side and the screen door only on the return side are 1.24 and 1.45,respectively.It takes 373s and 305s for the average temperature of the platform to return to the stable state when the screen door is not opened,respectively,when the screen door is opened on the supply side and the screen door on the return side is opened.This paper explores the influence and significant degree of leakage air on the thermal environment of subway platform when the screen door is open under the diffuse ceiling ventilation mode,which provides a reference for the design of subway platform environmental control system and the construction of thermal environment.
作者
陈俞婷
余涛
CHEN Yuting;YU Tao(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Tianfu Yongxing Laboratory,Chengdu610213,China)
出处
《绿色建筑》
2025年第1期14-19,26,共7页
Green Building
关键词
屏蔽门漏风
顶棚弥散送风
数值模拟
站台热环境
air leakage of screen door
diffuse ceiling ventilation
numerical simulation
platform thermal environment
作者简介
第一作者:陈俞婷,研究方向为暖通空调节能与可再生能源利用,现就读于西南交通大学;通信作者:余涛,博士研究生,副教授,研究方向为建筑节能与可再生能源应用、建筑热环境及其控制等,现供职于西南交通大学。通信地址:四川省成都市金牛区二环路北一段111号西南交通大学九里校区。
