Distribution characteristics of respiratory aerosols in enclosed environments

作     者：高乃平 牛建磊 Lidia Morawska Gao Naiping;Niu Jianlei;Lidia Morawska

作者机构：同济大学机械工程学院上海200092 香港理工大学屋宇设备工程学系 School of Physical and Chemical SciencesQueensland University of TechnologyQueensland 

出 版 物：《Journal of Southeast University(English Edition)》 (东南大学学报（英文版）)

年 卷 期：2010年第26卷第2期

页      面：232-237页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：The National Natural Science Foundation of China(No.50808133) the Dean's Reserve of Faculty of Construction and Land Use at the Hong Kong Polytechnic University 

主　　题：respiratory droplets displacement ventilation under-floor air distribution(UFAD) transmission airborne disease 

摘      要：This paper studies the spatial concentration distribution and temporal evolution of exhaled and sneezed/coughed droplets within the range of 1.0 to 10.0 μm in an office room with three air distribution methods,including mixing ventilation（MV）,displacement ventilation（DV）,and under-floor air distribution（UFAD）.The simulation results indicate that exhaled droplets with diameters up to 10.0 μm from normal respiration process are uniformly distributed in ***,they become trapped at the breathing height by thermal stratifications in DV and UFAD,resulting in a high droplet concentration and an increased exposure risk to other ***/coughed droplets are more slowly diluted in DV/UFAD than in *** air speed in the breathing zone in DV/UFAD can lead to prolonged human exposure to droplets in the breathing zone.