Prediction of mean skin temperature in hot outdoor environment considering sweat efficiency and wet clothing

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  • 無効発汗・着衣のぬれを考慮した屋外環境における平均皮膚表面温度の予測
  • ムコウ ハッカン チャクイ ノ ヌレ オ コウリョ シタ オクガイ カンキョウ ニ オケル ヘイキン ヒフ ヒョウメン オンド ノ ヨソク

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The aim of this research is to develop a new human model to predict mean skin temperature for evaluating hot outdoor environments. The model considers effects of solar radiation, sweat efficiency and wet clothing. The effect of solar radiation is given as a "solar operative temperature" defined as a function of net solar radiation absorbed on the surfaces of the skin and clothing after multiple reflections. We have measured solar transmittance and reflectance of some clothing of white T-shirt, navy blue shorts and grey T-shirt in an outdoor environment. A series of experiments using collage age subjects wearing the clothing of white T-shirt and navy blue shorts described above has been conducted outdoors with solar radiation, and mean skin temperatures were measured. Comparison is made between mean skin temperatures of those predicted from the model developed by the authors and those obtained by experiments. It is shown that the new model is valid to predict mean skin temperature in a hot outdoor environment within 0.5K accuracy.

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