摘要
目的研究穿堂通风去除室内甲醛污染的变化规律,得到不同季节合理的最短穿堂通风时间.方法以沈阳市某代表性住宅为例,建立住宅物理模型,利用CFD进行数值模拟,使用实测甲醛质量浓度值作为甲醛源强,模拟穿堂通风在不同季节典型风速工况下的甲醛质量浓度变化规律.结果冬季甲醛初始质量浓度为0.148 mg/m^3时,穿堂通风150 s室内甲醛质量浓度可达到0.057 mg/m^3;夏季甲醛初始质量浓度为0.25 mg/m^3时,穿堂通风500 s室内甲醛质量浓度达到0.05 mg/m^3;过渡季甲醛初始质量浓度为0.23 mg/m^3时,穿堂通风200 s室内甲醛质量浓度达到0.055 mg/m^3.结论各季节穿堂通风使室内甲醛质量浓度达到稳定的时间不同,尽管穿堂通风可能会给居民带来不舒适感,但穿堂通风可快速地降低室内甲醛质量浓度.
The change rule of hall ventilation to remove indoor HCHO pollution was studied to obtain the shortest ventilation time in different seasons.A representative residence in shenyang as an example,its physical model is established by using CFD numerical simulation.The measured formaldehyde mass concentration as the formaldehyde source,the formaldehyde concentration of hall ventilation was simulated under typical wind speed conditions in different seasons.In winter,when the initial concentration of formaldehyde is 0.148 mg/m^3,indoor formaldehyde concentration can reach 0.057 mg/m^3 after 150 s ventilation.after summer,when the initial concentration of formaldehyde is 0.25 mg/m^3,indoor formaldehyde concentration can reach 0.05 mg/m^3 after 500 s ventilation.In transition season,when the initial concentration of formaldehyde is 0.23 mg/m^3,indoor formaldehyde concentration can reach 0.055 mg/m^3 after 200 s ventilation.The results show that the time of reaching a stable level for indoor formaldehyde concentration is different in each seasons.Although hall ventilation may bring discomfort to residents,hall ventilation can rapidly reduce indoor formaldehyde concentration.
作者
黄凯良
王珺
冯国会
宋嘉森
HUANG Kailiang;WANG Jun;FENG Guohui;SONG Jiasen(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China 110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第3期568-576,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
“十三五”国家重点研发项目子课题(2016YFC0700501-02)
辽宁省自然科学基金指导计划项目(201601211)
沈阳市中青年科技创新人才支持计划(SHSCXRC2017003)。
关键词
穿堂通风
甲醛质量浓度
数值模拟
开窗热损失
ventilation
formaldehyde concentration
numerical simulation
heat loss
