1989 Fiscal Year Final Research Report Summary
RESEARCH ON CONTAMINATION OF AIR CONDITIONING DUCT
| Project/Area Number |
62550425
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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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 | Nippon Institute of Technology |
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Principal Investigator |
OZAO Shinichiro NIPPON INSTITUTE OF TECHNOLOGY, Faculty of Engineering, ASSISTANT PROFESSOR., 工学部・建築学科, 講師 (00049727)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIZAWA Susumu SCIENCE UNIVERSITY OF TOKYO, Faculty of Engineering, PROFESSOR, 工学部・建築学科, 教授 (20077176)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Air Conditioning Systems / Contamination of Duct / Fallen and Adsorption Particles / Fungus / Stamping Measurement Equipment of Adsorption Particle / Duct Cleaning / Foxing Phenomenon |
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| Research Abstract |
Field studies were carried out on air contamination by dust particles from air conditioning systems in four buildings in Tokyo area. We tried to investigate contamination of airborne particle and surface contamination by sedimentary dust in air duct, and considered a matter in all its aspects that caused indoor air pollution. The particulate contamination at surface in air duct is concerned with indoor air pollution, therefore we investigated relations of contaminations with duct surface and supply outlet.
Main results obtained were as follows: 1. Time variations of airborne particle concentrations at supply outlet were influenced by the operation of air conditioning system. 2. Specially, maximum concentration was showed at the first one of the day. 3. The test on the opening of the service port door showed most significant in crease of the particulate generation. 4. Size distributions of particle were gained, that are caused by the operation. 5. Particle size of 1- 5mum are worth notice on air contamination from air conditioning systems. 6. For measurement of duct surface contamination, we developed new sumpler that were tested by using optical density(O.D) of particle.
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