中小学教室机械通风引入室外新风效果模拟  

Effect Simulation for Fresh Air Introduction by Mechanical Ventilation in Primary and Middle School Classrooms

作　　者：李琼[1] 郑文国[1] LI Qiong ZHENG Wenguo

机构地区：[1]香港华艺设计顾问(深圳)有限公司,广东深圳518000

出　　处：《煤气与热力》2017年第7期27-30,共4页Gas & Heat

摘　　要：以中小学教室为研究对象,采用Airpak软件,对采用机械通风方式引入新风的室内二氧化碳体积分数、空气龄的分布进行模拟。模拟条件:换气次数为1.0、2.5、4.0、5.0 h^(-1),通风扇(抽气,新风由门窗缝隙渗入)安装位置分别为教室前后门位置、中间位置。通风机安装在教室前后门位置时,随着换气次数的增大,室外气流逐步深入房间,室内CO_2体积分数与空气龄均呈下降趋势。换气次数1.0 h^(-1)不满足GB/T 18883—2002《室内空气质量标准》规定的室内CO_2体积分数不得高于1 000×10^(-6)限值要求,换气次数为2.5、4.0、5.0 h^(-1)时可满足要求。通风扇安装在教室中间位置时,室内CO_2平均体积分数更低,对空气龄的影响不大。Taking the primary and mid（tie school classrooms as the research object, the Airpak software is used to simulate the distribution of indoor carbon dioxide volume fraction and air age after fl-esh air introduction by mechanical ventilation. Simulation conditions are as follows： the air exchange rates are 1.0,2.5,4.0 and 5.0 h^ -1 ,and ventilation fans （ pum- ping and permeating fresh air from the door and window gap） are installed in front and rear door position and middle position of the classrooms, respectively. When the ventilation fans are installed in front and rear door position of the classrooms,with the increase of air ex- change rate, outdoor air flows gradually into the classro- oms, and both indoor carbon dioxide volume fraction and air age show a downward trend. The air exchange rate of 1.0 h ^-1 cannot meet the limit requirement spec- ified in the Indoor Air Quality Standards （ GB/T 18883 -2002）, namely the indoor carbon dioxide volume fraction should not be higher than 1 000×10^ -6,while the air exchange rate of 2.5,4.0 and 5.0 h this requirement. When the ventilation fan is installed in the middle position of the classroom, the average volume fraction of indoor carbon dioxide is lower, and the air age is slightly affected.

关 键 词：中小学教室 机械通风 新风引入 CO2体积分数 空气龄 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]