The reduction of microbial contamination and the method of energy-saving coexistence in individual distributed air-conditioning systems

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289198
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Architectural environment/Equipment
• Research Institution: Kogakuin University
• Principal Investigator: Yanagi U 工学院大学, 公私立大学の部局等, 教授 (50370945)
• Co-Investigator(Kenkyū-buntansha): NOBE TATSUO 工学院大学, 建築学部・建築学科, 教授 (40338273) ; KAGAI NAOKI 東京工業大学, 情報理工学(系)研究科, 准教授 (20345383) ; KAMATA YOUICHI 岩手大学, 農学部, 教授 (20152837)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 空調システム / 省エネ / 空気質 / 微生物 / 細菌 / 真菌 / マイコトキシン / DNA

Outline of Final Research Achievements

The following matter became clear from this study.
(1) In an individual air-conditioning system, the length of the time when relative humidity is maintained to 70% or more affects growth of mold greatly. (2) In case of the contamination inside of an air-conditioning was remarkable, correlation between suspended particle concentration lager than 2 micrometers and airborne fungus concentration was accepted. From this, it was suggested that airborne fungus concentration can be predicted to some extent from the suspended particle concentration of ≧2 μm. (3) The bacteria of 111 genus including a pathogenic bacillus and opportunistic infection bacillus were detected from the air outlet of air-conditioning. (4) The mycotoxin blocks growth of other fungi. That is, it was checked that the principle of competition is working. (5) Since the power consumption of an individual system was not so large as a central system, the clear effect of energy saving by washing was not confiromed.

Free Research Field

建築環境工学