Thermal environment mitigation effects in suburban area

Yoshihito Kurazumi,Yoshiaki Yamato,Kunihito Tobita,Tadahiro Tsuchikawa,Kenta Fukagawa,Emi Kondo,S.I Tanabe,G Cao,I Nastase,C Inard,J Kurnitski,M.C Gameiro Da Silva,L Mazzarela,P Wargocki,H Zhang

doi:10.1051/e3sconf/201911106041

Abstract

The purpose of this paper is to clarify the relationship between the physiological and psychological responses of the human body and the outdoor environment evaluation index ETFe (enhanced conductioncorrected modified effective temperature). The experiments were carried out in summer. For the measurements, observation points were selected with consideration for the condition of the ground surface such as bare ground where the surface is gravel or soil; paved ground such as concrete, asphalt or blocks; green areas covered in plants and water surfaces and with consideration for the condition of the sky factor due to buildings or trees. 19 observation points were chosen. Subjects were 38 healthy young. ETFe that was considered to report neither hot nor cold, thermally neutral sensation, was 30.6°C. ETFe that was considered to report neither comfortable nor uncomfortable comfort was 35.5°C. It was considered that the threshold for the human body with regards to thermal environment stimuli in an outdoor space is higher than the thermal environment stimuli in a summer indoor space.

Highlights

Ishii et al [1], Fukagawa et al [2, 3], etc. measure the influence of park lakes, agricultural ponds, etc., on the summer outdoor thermal environment
The environment is influenced by the depth of water, the temperature of the surface of the water and the direction of the wind, but the trend is observed whereby the air temperature tends to be lower directly above the water surface and in the vicinity of the pond compared to the surrounding area
Kurazumi et al [4,5,6] demonstrates the influence of an outdoor thermal environment on the human body with the outdoor thermal environment evaluation index enhanced conduction-corrected modified effective temperature (ETFe) [7] for the influence of a tropical climate with strong shortwave length solar radiation on the thermal sensation of the human body as the evaluation axis. It clarifies that in tropical areas where the effects of nighttime cooling cannot be expected, the effect of long-wave length thermal radiation is strong in the shade of objects made of materials with high heat capacity, and the effect of improving the thermal sensation of the human body through shade is low. These studies quantitatively show that when the outdoor thermal environment is harsh, it is essential to reduce the influence of long-wave length thermal radiation

Summary

Introduction

Ishii et al [1], Fukagawa et al [2, 3], etc. measure the influence of park lakes, agricultural ponds, etc., on the summer outdoor thermal environment. Kurazumi et al [4,5,6] demonstrates the influence of an outdoor thermal environment on the human body with the outdoor thermal environment evaluation index ETFe [7] for the influence of a tropical climate with strong shortwave length solar radiation on the thermal sensation of the human body as the evaluation axis It clarifies that in tropical areas where the effects of nighttime cooling cannot be expected, the effect of long-wave length thermal radiation is strong in the shade of objects made of materials with high heat capacity, and the effect of improving the thermal sensation of the human body through shade is low. These studies quantitatively show that when the outdoor thermal environment is harsh, it is essential to reduce the influence of long-wave length thermal radiation

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Results

Conclusion