Author(s)

Yoshihito Kurazumi^1*, Tomonori Sakoi², Agnes Nyilas¹

¹School of Life Studies, Sugiyama Jogakuen University, Nagoya, Japan.
²Academic Assembly, Institute of Textile Science and Technology, Shinshu University, Ueda, Japan.

When the thermal environment is under heated conditions, short-wavelength solar radiation shows a strong influence on the human body and the heat is accumulated in the human body. In order to demonstrate the effect of the short-wavelength solar radiation absorptivity of clothing on physiological temperature in an outdoor space, the relationship between the thermal environment evaluation index, ETFe, and the thermal sensory perceptions of the human body was investigated. A significant temperature difference of 2.7°C was shown for an ETFe that was thermally neutral (neither hot nor cold). The effect of short-wavelength solar radiation absorptivity was strongly apparent in ETFe when direct solar radiation was strong and in warmer outdoor spaces. In an outdoor space where the effect of the sky factor and albedo was strong, the setting of the short-wavelength solar radiation absorptivity was demonstrated to greatly impact the estimation of perceived and physiological temperature. When interviewing subjects on clothing in an outdoor space, it is essential to obtain the hue of clothing.

Thermal Environment Evaluation Index, Body Heat Balance, Clothing, Solar Radiation Absorptivity, Thermal Sensory Perceptions

Kurazumi, Y. , Sakoi, T. and Nyilas, A. (2018) The Influence of the Solar Radiation Absorptivity up on the Outdoor Thermal Environment Evaluation Index and the Thermal Sensory Perceptions. American Journal of Climate Change, 7, 204-217. doi: 10.4236/ajcc.2018.72014.