| Project/Area Number |
62850107
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
建築環境・環境工学
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| Research Institution | Institute of Industrial Science, University of Tokyo |
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Principal Investigator |
KATO Sinsuke Institute of Industrial Science, University of Tokyo, 生産技術研究所・第5部, 助教授 (00142240)
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| Co-Investigator(Kenkyū-buntansha) |
田中 幸彦 フジタ工業, 技術研究所, 研究員
須山 善美 間組, 技術研究所, 研究員
MOCHIDA Akashi Institute of Industrial Science, University of Tokyo, 生産技術研究所・計測技術開発センター, 助手 (00183658)
MURAKAMI Shuzo Institute of Industrial Science, University of Tokyo, 生産技術研究所・計測技術開発センター, 教授 (40013180)
SUYAMA Yoshimi Institute of Technology, Hazama-Gumi
TANAKA Yukihiko Institute of Technology, Fujita Corparation
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1988: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1987: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Keywords | Conventional Flow Type Clean Room / Numerical Simulation / 給排気システム / 換気効率 / 気流性状 / 汚染生拡散性状 / 模型実験 / 数値シミュレーション / 数値シュミレーション |
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| Research Abstract |
Three new scales for measuring ventilation efficiency in a room are defined in order to evaluate the distributions of "ventilation effectiveness" at each point in a room. They are calculated based on the distributions of contaminant concentration in a room.
1. SVE1 ( Scale for Ventilation Efficlency 1 ): the spatial average of contaminant concentration in a room where contaminants are generated at a single-point source. It is a function of position, because the averaged value differs according to the location of each source point. This value is defined as a representative of spatial distribution.
2. SVE2: the mean radius of contaminant diffusion in a room. It is defined as the standard deviation of contaminant distribution. It is also a function of position and is defined as another representative of spatial distribution.
3. SVE3: the concentration at a given point in a room, where the contaminant is uniformly generated throughout the room.
SVE1 and SVE2 for one point are calculated from the distribution of contaminant concentration where the contaminant source is located at the point in question. Therefore, SVE1 and SVE2 for all points are obtained by changing the position of the source point to include the entire space. In order to confirm the usefulness of these new scales. the characteristics of ventilation efficiency in an actual conventional flow type of clean room are analyzed by these scales, which are given by calculating the results of three-dimensional mumerical simulation of flow and diffusion field based on the k-xi two-equation model.
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