TY - JOUR
T1 - Hybrid emergency ventilation system for controlling inhaled contaminant dose in the case of chemical leakage
AU - Ichimiya, Shun
AU - Murga, Alicia
AU - Yoo, Sung Jun
AU - Sumiyoshi, Eisaku
AU - Harashima, Hiroshi
AU - Long, Zhengwei
AU - Ito, Kazuhide
N1 - Funding Information:
This study was partially supported by JSPS (Japan Society for the Promotion of Science) Fund for the Promotion of Joint International Research (KAKENHI), Category (A) of Scientific Research (Grant Number JP 18H03807).
Publisher Copyright:
© The Author(s) 2021.
PY - 2022/3
Y1 - 2022/3
N2 - In factories where high-risk chemical pollutants are treated, it is essential to anticipate response measures in the event of chemical pollutant leakage to minimize adverse health effects on workers. When high-risk liquid chemical pollutants are assumed to be leaked inside enclosed spaces, it becomes crucial to predict the non-uniform concentration distributions in enclosed spaces and evaluate the health impacts and risks of short-time exposure to prevent large-scale accidents. Therefore, we have developed an emergency ventilation system for controlling the inhaled contaminant dose of factory workers. In this study, assuming a worst-case scenario liquid chemical pollutant leak in an enclosed factory space, the advantages and performance of a hybrid ventilation system that combines displacement and push–pull type ventilation systems were numerically investigated. Installation of wall materials that facilitate photocatalytic oxidation (PCO) reactions for background passive concentration control was also discussed. Based on the demonstrative numerical analyses for a realistic factory space, push–pull type ventilation system was confirmed to effectively suppress chemical pollutant diffusion in enclosed spaces with a low ventilation rate. Wall materials with the PCO mechanism had a certain contribution to the control of peak concentration.
AB - In factories where high-risk chemical pollutants are treated, it is essential to anticipate response measures in the event of chemical pollutant leakage to minimize adverse health effects on workers. When high-risk liquid chemical pollutants are assumed to be leaked inside enclosed spaces, it becomes crucial to predict the non-uniform concentration distributions in enclosed spaces and evaluate the health impacts and risks of short-time exposure to prevent large-scale accidents. Therefore, we have developed an emergency ventilation system for controlling the inhaled contaminant dose of factory workers. In this study, assuming a worst-case scenario liquid chemical pollutant leak in an enclosed factory space, the advantages and performance of a hybrid ventilation system that combines displacement and push–pull type ventilation systems were numerically investigated. Installation of wall materials that facilitate photocatalytic oxidation (PCO) reactions for background passive concentration control was also discussed. Based on the demonstrative numerical analyses for a realistic factory space, push–pull type ventilation system was confirmed to effectively suppress chemical pollutant diffusion in enclosed spaces with a low ventilation rate. Wall materials with the PCO mechanism had a certain contribution to the control of peak concentration.
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U2 - 10.1177/1420326X211026360
DO - 10.1177/1420326X211026360
M3 - Article
AN - SCOPUS:85108502550
VL - 31
SP - 696
EP - 709
JO - Indoor and Built Environment
JF - Indoor and Built Environment
SN - 1420-326X
IS - 3
ER -