摘要
近年来室内空气质量受到人们越来越多的关注,为研究冬季置换通风条件下地暖房间内地板再悬浮颗粒物的沉积扩散特性,采用CFD的方法对室内置换通风颗粒物扩散进行了模拟研究。研究中建立了3 m×3 m×3 m的置换通风地暖房间缩比模型,使用经实验验证过的RNG k-ε湍流模型对不同粒径(1μm、2.5μm、10μm)的再悬浮颗粒物在同、异侧置换通风及不同室内采暖温度下的分布特性进行了数值模拟。结论如下:粒径为1μm、2.5μm颗粒物的扩散特性相同,可以合并研究;置换通风地暖房间加热后出风口位置对浓度无影响;地暖加热可以降低呼吸高度颗粒物浓度,在Ar=2.01时1μm颗粒物浓度相比不加热时分别下降了50.92%、43.11%,降幅明显,在Ar=8.04时浓度降到最低。
In recent years,more and more attention has been paid to indoor air quality.In order to study the deposition and dispersion characteristics of resuspended particles in floor-heating rooms under replacement ventilation conditions in winter,CFD method was used to simulate the indoor replacement ventilation particle dispersion.A scaled model of a 3 m×3 m×3 m replacement ventilated room with floor-heating systems was established.The experimentally verified RNG k-εturbulence model was used to evaluate the distribution characteristics of resuspended particles with different particle sizes under the same and different-side displacement ventilation and different heating temperatures.The conclusions were as follows:the diffusion characteristics of 1μm and 2.5μm particulate matter are the same and can be combined for study;the location of the air outlet has no impact on the concentration in displacement ventilated rooms after heating the floor;the effect of floor-heating can reduce the concentration of pedestrian breathing height particles,as the concentration of particulate matter decreased by 50.92% and 43.11% respectively compared with that without heating in two types of rooms when Ar=2.01,and the concentration is reduced to the lowest at Ar=8.04.
作者
姚一丰
张嘉丹
郭磊
崔鹏义
罗杨
黄远东(指导)
YAO Yi-feng;ZHANG Jia-dan;GUO Lei;CUI Peng-yi;LUO Yang;HUANG Yuan-dong(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,C)
出处
《建筑节能（中英文）》
CAS
2022年第10期138-144,共7页
Building Energy Efficiency
基金
上海市“科技创新行动计划”社会发展科技攻关项目(20dz1204008)
国家自然科学青年基金(NO.52106102)。
关键词
数值模拟
置换通风
地暖
DPM模型
再悬浮颗粒
numerical simulation
displacement ventilation
floor-heating
DPM model
resuspended particles
