著者

岩前 篤 松本 衛 近田 智也 松下 敬幸 松村 収

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.65, no.528, pp.29-36, 2000-02-28 (Released:2017-02-03)

参考文献数

14

被引用文献数

5 3

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We found many houses have condensation in the crawl space in summer. These houses have enough openings on the foundation to ventilate and vapor retarder at the ground surface for the recommend in the building code. The temperature and humidity in the crawl space have great influences to durability of the house. We made clear the annual variations of hygro-thermal environment of the crawl space by the field measurements and numerical analysis. We monitored the temperature and humidity variations of 36 houses in Japan for 2 years. The numerical calculations based on the vertical one dimension heat transfer model represented the monitored results. The results show the houses in Japan normally have condensation in crawl space in summer. The condensation term is from one week to one month. The daily average of crawl space's vapor pressure is nearly equal to that of the outdoors. The difference of 2 years results is so great that we think the main factor is outdoor condition. The thermal resistance of the floor and moisture of the ground do not have great effect on the crawl space humidity.

著者

開原 典子 高田 暁 松下 敬幸

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.79, no.697, pp.233-239, 2014-03-30 (Released:2014-07-10)

参考文献数

20

被引用文献数

1

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Based on the measurement of the moisture content in the stratum corneum, the transient model of the moisture transfer in skin was proposed with using the simultaneous heat and moisture transfer equations for hygroscopic range. For the modeling, the simultaneous heat and moisture transfer equation for the hygroscopic range was adapted for the stratum corneum with the thickness of 30μm, considering the contact with the ambient air, and the skin moisture content at the depth of 30μm given as saturated. As the results, the distribution of moisture content calculated by using the proposed analytical model agreed with the measured results, by taking into account the dependence of the moisture conductivity on the moisture content. It was suggested that the proposed model could explain the transient response of skin surface moisture distribution to the change in indoor humidity.