著者

佐藤 慶季 中島 裕輔

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.83, no.753, pp.901-911, 2018 (Released:2018-11-30)

参考文献数

22

被引用文献数

1

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Recent years have seen the wide adoption of floor insulated houses. Floor insulated houses is Many studies in the past have reported the high humidity of crawl spaces in the summer season. In this research, we propose a humidity control method for crawl spaces in floor insulated houses based on actual measurement data. The effects of that proposal on crawl spaces were clarified through experimentation and simulation. The result is shown as follows. 1) In the actual measurement, crawl space of target house is average relative humidity 80% or more in summer season. It was guessed that high humidity of crawl spaces can be suppressed by supplying indoor air to crawl space. 2) In the experimentation, it was confirmed that the relative humidity decreased due to the air supply effect. But the cumulative percentage at a relative humidity of over 80% didn't fall below 80 percent. Therefore, this result shows that the risk of fungal contamination is high. 3) In the simulation, calculations were performed to supply indoor air to the crawl space as in the actual measurement. it was confirmed that the relative humidity decreased due to the air supply effect in all areas. And it was shown that the risk of fungal contamination is relatively low where the cumulative percentage of relative humidity of 80% or more is 50% or less. Increase rate of heating load in the house was about 10% at maximum. As above, characteristics of hygrothermal behavior in the crawl space were clarify. And it was shown that supplying indoor air to the crawl space is effective for reduction of high humidity in the crawl space. The proposed method is effective only when indoor air is low humidity by air conditioner etc. But it is guessed that there are many people who use air conditioning in summer season. Therefore, it is believed that the method proposed in this research is important.