Field measurement of the impact of natural ventilation and portable air cleaners on indoor air quality in three occupant states  

作　　者：Haiguo Yin Zhuohang Li Xinping Zhai Yuxuan Ning Le Gao Haihang Cui Zhenjun Ma Angui Li 

机构地区：[1]School of Building Services Science and Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China [2]The Key Lab of Plateau Building and Eco-community in Qinghai,Xining,Qinghai 810008,China [3]Qinghai Building and Materials Research Co.,Ltd,Xining,Qinghai 810008,China [4]Qingdao Municipal Engineering Design Research Institute,Qingdao,Shandong 266000,China [5]Sustainable Buildings Research Centre,University of Wollongong,NSW 2522,Australia

出　　处：《Energy and Built Environment》2023年第5期601-613,共13页能源与人工环境（英文）

基　　金：This study was jointly funded by the National Key Research and Development Program of China(No.2016YFC0700500);the Opening Fund of Key Laboratory of Plateau Green Building and Ecological Community in Qinghai Province(No.KLKF-2020-005).

摘　　要：Natural ventilation(NV)has been considered a simple and effective method of ventilation.However,the intro-duction of NV does not achieve better indoor air quality(IAQ)when the outdoor atmospheric environment is polluted.Therefore,portable air cleaners(PACs)are increasing in use in recent years,but their effectiveness is highly dependent on the residents’habits.A typical residence in Xi’an,China was selected to examine the effects of the use of NV alone and the use of NV and PACs together on IAQ in the three occupant states,i.e.,unoc-cupied,sleeping and leisure.Parameters,such as temperature,relative humidity,CO_(2),and PM_(2.5)concentration were measured when changing the window opening and the position of the PAC.The results showed that in the unoccupied state,opening the inner door can promote a more uniform thermal and humid environment.In the sleeping state,the I/O ratio of the PM_(2.5)concentration was the lowest when the window opening of the bedroom was 1/2 or 3/4,with a mean value of 0.3.In the leisure state,only using NV,when the purification rate reaches 90%,the mean purification time of each window opening in the living room is 87.5 min.The mean purification time was reduced to 25 min when both NV and PAC were used.The on-site purification efficiencies were 91.0%and 94.5%,when the window opening was 1/2(i.e.,the PAC was placed in the center of the room)and 3/4(i.e.,the PAC was placed away from the outer window),respectively.

关 键 词：Residential buildings Indoor air quality Field measurement Natural ventilation Portable air cleaner Occupant states 

分 类 号：TU20[建筑科学—建筑设计及理论]