STUDY ON CONCEALED CONDENSATION IN WOODEN WALLS DURING COOLING PERIOD OF SUMMER SEASON : Part 1 Experiment of non-steady state condensation of walls in artificial climate rooms

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  • SAITO Hiroaki
    Japan Testing Center for Construction Material, Central Laboratory
  • TUCHIYA Takao
    Department of Architecture, Faculty of Engineering, Tokyo Univ.

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Other Title
  • 冷房時における夏型壁体内結露に関する研究 : その1 人工気候室における非定常結露実験
  • 冷房時における夏型壁体内結露に関する研究
  • レイボウジ ニ オケル ナツガタ ヘキタイ ナイ ケツロ ニ カンスル ケンキュウ

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The aim of this paper focuses on explicating phenomena of concealed condensation in wood frame construction walls caused by the undesirable temperature rise due to sun burn. Two types of laboratory experiments were carried out to explicate these phenomena. One was a humidity response test for small specimens of porous material, the other was a wood frame wall model test in which specimens of wall were sandwiched between two test chambers, one representing a room and the other representing the outdoor environment simulated to standardized meteorological data for Tokyo. We conclude that concealed condensation was caused by desorption of moisture which porous materials contain and a vented wall can reduce these condensation. But this paper suggest that more study should be done on the prevention of concealed condensation too.

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