著者

林 基哉 金 勲 開原 典子 小林 健一 鍵 直樹 柳 宇 東 賢一

出版者

日本建築学会

雑誌

日本建築学会環境系論文集 (ISSN:13480685)

巻号頁・発行日

vol.84, no.765, pp.1011-1018, 2019 (Released:2019-11-30)

参考文献数

14

被引用文献数

1 2

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The state of the increase in the nonconformity rates of air environment in specific buildings was investigated using local government survey reports. The factors in the increase of carbon dioxide concentration were analyzed in consideration of the increase of ambient concentration, the characteristics of indoor concentrations and the characteristics of the government reports. The results were as follows. 1 The nonconformity rates of humidity, temperature and carbon dioxide concentration have increased with the number of specific buildings since 1999. And reports made by the owners of specific buildings are substituted for inspections by government officials in most prefectures. 2 One of the factors in the increase of nonconformity rates of temperature, humidity and carbon dioxide concentration is the increase of reports using measurement data by building maintenance suppliers. The nonconformity rates of humidity and carbon dioxide concentration were higher in northern prefectures. 3 The frequency of indoor carbon dioxide concentration in specific buildings in Tokyo was similar to that in Osaka. The frequency distribution of the differences between indoor concentration and outdoor concentration in Tokyo follows Weibull frequency distribution. 4 The ambient concentration of carbon dioxide has increased especially in urban areas. The increase of ambient concentration is thought to increase the indoor concentrations in specific buildings. 5 The nonconformity rates of carbon dioxide concentration depend on not only ambient concentration but also the rates of ventilation reduction and survey methods by governments. The nonconformity rates were calculated using an equation composed on the basis of Weibull frequency. The coefficients of these factors were calculated using the equation and the survey data on all Japan. 6 The increase of ambient concentration made the nonconformity rate of indoor concentration 3.1% higher and ventilation reduction made it 7.2% higher and the change of survey method made it 11.6% higher in these nineteen years. These results showed that the increase of nonconformity rates depends on several factors. Therefore it is necessary to design integrated countermeasures in order to decrease these nonconformity rates.