2023 Fiscal Year Final Research Report
Development of bioaerosol assessment index in indoor spaces and methods to reduce the risk of infection
| Project/Area Number |
21H01495
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 23020:Architectural environment and building equipment-related
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
金 政一 東京理科大学, 工学部建築学科, 助教 (50887891)
李 時桓 名古屋大学, 環境学研究科, 准教授 (60624997)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | バイオエアロゾル / 挙動特性 / 数値解析 / 換気 / 感染リスク / 重力沈降 / 沈着 / 蒸発 |
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| Outline of Final Research Achievements |
The risk of infection was quantitatively evaluated by measuring the particle size distribution of aerosols generated by various respiration-related activities in subjects. After understanding the airflow characteristics of natural ventilation by visualization, the gravitational settling and deposition velocity of particulate matter by particle size were quantitatively demonstrated by numerical analysis. The air age distribution in a room and the effect of air purifiers on room air were considered from the tracer gas experimental method applying the theory of dynamic steady-state concentration, and evaluated using the contaminant removal effectiveness (CRE) according to the relative distance of air purifiers based on actual measurements using particulate matter and numerical analysis.
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| Free Research Field |
建築環境・設備（換気力学，換気設備，通風，CFD）
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| Academic Significance and Societal Importance of the Research Achievements |
一般的な換気計画を行う際には，室内の完全混合を仮定し，室内における汚染質濃度分布を無視した状態で必要換気量を算定することが多い。本研究ではバイオエアロゾルを汚染源とする局所的な汚染発生での換気量の算出及び換気基準の確立を目指そうとする新たな試みであり、実験的な手法による数理疫学の検証，数値解析による定量的な検討により，感染症対策としての数理疫学理論の建築設備工学理論への適用が可能であることを確認した。同様の提案は国内外で例がなく，今までと異なる新たな換気効率の評価手法として，様々な用途における換気システムの評価に活用することが可能である。
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