摘要
为研究非单向流洁净室内含尘浓度分布的影响因素,在送风口尺寸分别为350 mm×260 mm、750 mm×400 mm、1200 mm×600 mm和换气次数分别为16次/h、20次/h、30次/h、40次/h的条件下,对室内含尘浓度分布特性展开了实验研究。实验结果表明:(1)在相同换气次数下,送风口尺寸越大,送风口边缘与墙面水平距离越近,室内含尘浓度变化幅度越大,室内空气洁净度越低;(2)送风口尺寸和换气次数共同影响室内含尘浓度,将室内含尘浓度平均值以送风口面积、换气次数为变量进行二次曲线拟合,得到室内含尘浓度平均值拟合计算式,其计算结果与实验数据相比,相对误差最大为5.72%,最小为0.15%;(3)送风速度对室内含尘浓度分布的均匀性有较大的影响,在同一换气次数下,随送风口尺寸的增大,送风速度减小,室内含尘浓度均匀性减弱;在同一送风口尺寸下,随换气次数的增加,送风速度增大,室内含尘浓度均匀性变差;(4)区域不均匀因子与不均匀系数概念类似,但可以较好地反映室内不同区域的均匀性。
In order to study the influencing factors of particle concentration distribution in non-unidirectional flow cleanroom,the distribution characteristics of indoor particle concentration were studied under the conditions of supply air outlet of 350 mm×260 mm,750 mm×400 mm,1200 mm×600 mm and air change rate of 16 h-1,20 h-1,30 h-1and 40 h-1.The experimental results indicate that:(1)Under the same air change rate,the larger the size of the supply air outlet is,the closer the horizontal distance between the edge of the supply air outlet and the wall is,the greater the variation of indoor particle concentration is,and the lower the cleanliness of indoor air is.(2)The size of the supply air outlet and the air exchange rate jointly affects the indoor particle concentration.The mean value of the indoor particle concentration is fitted by a quadratic curve fitting with the supply air area size and air exchange rate as variables,and the quasi-total formula of the average indoor particle concentration is obtained.Compared with the experimental data,the maximum relative error is 5.72%and the minimum is 0.15%.(3)The supply air velocity has a significant influence on the uniformity of indoor particle concentration distribution.Under the same air exchange rate,the supply air velocity decreases and the indoor uniformity decreases with the increase of the supply air outlet size;under the same supply air outlet size,with the increase of the air exchange rate,the supply air velocity increases and the indoor uniformity becomes worse.(4)The regional non-uniformity factor is similar to the concept of non-uniformity coefficient,but it can better reflect the uniformity of different indoor areas.
作者
黄晨
黄翠
李浩
吴重纬
HUANG Chen;HUANG Cui;LI Hao;WU Chong-wei(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Hongyang Group Co,Ltd.,Shanghai 201100,China)
出处
《建筑节能（中英文）》
2021年第5期31-36,共6页
Building Energy Efficiency
关键词
非单向流
不均匀系数
送风口尺寸
换气次数
送风速度
区域不均匀因子
non-unidirectional flow
non-uniform coefficient
supply air outlet
air change rate
supply air velocity
regional non-uniformity factor
