2003 Fiscal Year Final Research Report Summary
Nationwide Investigation of Relationship among Performance of Ventilation System, Ventilation rate and Indoor Air Quality in Airtight Houses
| Project/Area Number |
13450232
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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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| Research Field |
Architectural environment/equipment
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| Research Institution | Tohoku University |
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Principal Investigator |
YOSHINO Hiroshi Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (30092373)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Takashi Iwate Prefectural University, Morioka Junior College, Professor, 盛岡短期大学部, 教授 (30301849)
IKEDA Kouichi The National Institute of Public Health, Department of Architectural Hygiene and Housing, Professor, 建築衛生学部, 部長 (90100057)
MOCHIDA Akashi Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (00183658)
NOZAKI Atsuo Tohoku Bunka gakuen University, Faculty of Science and Technology, Associate Professor, 科学技術学部, 助教授 (80316447)
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| Project Period (FY) |
2001 – 2003
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| Keywords | PFT method / Verification of accuracy / Field Measurement / Questionnaire Survey / Ventilation System / Ventilation Rate / Indoor Air Quality / Interrelationship |
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| Research Abstract |
1.A new measuring method for evaluating ventilation rate was developed.
2.Ventilation rates and indoor air quality in airtight houses in most parts of Japan were investigated by field measurements. Field measurements were carried out in summer and winter for three years.
・The result of measurement of airflow at outlet shows that 19 (68%) houses out of 28 indicate a low air change rate, which is lower than 0.5 h^<-1>.
・The result of ventilation airflow rate by constant concentration method shows that 9 (43%) houses out of 21 indicate a low air change rate, which is lower than 0.5h^<-1>.
・The formaldehyde concentrations in 39 (40%) rooms of 98 exceeded the criterion of the guideline from the Ministry of Health, Labor and Welfare of Japan.
・TVOC concentrations in 52 (53%) rooms of 99 exceeded the criterion of the advisable value from the Ministry of Health, Labor and Welfare of Japan.
・In the residence where the amount of ventilation rates was insufficient, chemistry substance concentrations exceeded the criterion of the guideline in many cases.
3.Numerical of thermal and ventilation performance on airtight houses sere carried out. The accuracy of numerical analysis was checked by comparing numerical simulations and results of field measurement.
4.Solutions to problems in those houses were suggested by numerical simulations.
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Research Products
(12 results)
