TY - JOUR
T1 - Pollutant capture efficiencies in and around the opening surface of a fume hood under realistic conditions
AU - Muta, Ryota
AU - Chung, Juyeon
AU - Li, Cong
AU - Yoo, Sung Jun
AU - Ito, Kazuhide
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was partially supported by Japan Science and Technology (JST), CREST Japan (Grant Number JP 20356547), and the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI) (Grant numbers JP 20KK0099 and JP 18H03807). The part of computation was carried out using the computer resource offered under the category of Intensively Promoted Projects by Research Institute for Information Technology, Kyushu University.
Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was partially supported by Japan Science and Technology (JST), CREST Japan (Grant Number JP 20356547), and the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI) (Grant numbers JP 20KK0099 and JP 18H03807). The part of computation was carried out using the computer resource offered under the category of Intensively Promoted Projects by Research Institute for Information Technology, Kyushu University.
Publisher Copyright:
© The Author(s) 2022.
PY - 2022/7
Y1 - 2022/7
N2 - Fume hoods are an indispensable instrument for experimental operations dealing with hazardous chemicals, wherein safety operations are strictly adherent to regulations. Within this context, few cases exist wherein the ventilation efficiency and pollutant capture efficiency inside fume hoods are precisely analyzed and quantitatively visualized. In this study, the pollutant capture efficiencies of a fume hood were analyzed by computational fluid dynamics as functions of exhaust airflow rate and according to the posture of workers in front of the fume hood. The indices for ventilation efficiencies, that is, age of air (SVE3), net escape velocity (NEV), and local purging flow rate (L-PFR), were adopted to quantitatively evaluate the pollutant concentration distributions formed inside the fume hood. NEV analysis revealed that the presence of a worker at the front of the fume hood did not significantly affect the pollutant capture efficiency at the opening surface of the fume hood. Changing the exhaust airflow rate resulted in changes in the size of the circulation flow formed in the upper part of the chamber. The circulation flow was found to have a dominant effect on the distribution of SVE3 and on the formation of the pollutant concentration distribution in the chamber.
AB - Fume hoods are an indispensable instrument for experimental operations dealing with hazardous chemicals, wherein safety operations are strictly adherent to regulations. Within this context, few cases exist wherein the ventilation efficiency and pollutant capture efficiency inside fume hoods are precisely analyzed and quantitatively visualized. In this study, the pollutant capture efficiencies of a fume hood were analyzed by computational fluid dynamics as functions of exhaust airflow rate and according to the posture of workers in front of the fume hood. The indices for ventilation efficiencies, that is, age of air (SVE3), net escape velocity (NEV), and local purging flow rate (L-PFR), were adopted to quantitatively evaluate the pollutant concentration distributions formed inside the fume hood. NEV analysis revealed that the presence of a worker at the front of the fume hood did not significantly affect the pollutant capture efficiency at the opening surface of the fume hood. Changing the exhaust airflow rate resulted in changes in the size of the circulation flow formed in the upper part of the chamber. The circulation flow was found to have a dominant effect on the distribution of SVE3 and on the formation of the pollutant concentration distribution in the chamber.
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U2 - 10.1177/1420326X211066538
DO - 10.1177/1420326X211066538
M3 - Article
AN - SCOPUS:85123988444
VL - 31
SP - 1636
EP - 1653
JO - Indoor and Built Environment
JF - Indoor and Built Environment
SN - 1420-326X
IS - 6
ER -
