都市内街区における路地の熱的快適性評価 : 京都西陣地区における調査

Abstract

To evaluate the thermal comfort of traditional narrow alleys, thermal environment measurements and a thermal comfort survey of 546 pedestrians were conducted in narrow alleys, middle-sized streets, and wide streets in Nishijin district in Kyoto during winter, spring, and summer. Window-opening behavior was also surveyed in spring for residents of houses facing streets. The results revealed the following: 1) Daytime air temperatures of the narrow alleys were 0.4-2.3 K lower than those of middle-sized streets and wide streets in all seasons. 2) The proportion of thermal comfort votes in the narrow alleys was 10-30% higher than for other streets in spring and summer. Middle-sized streets were the most comfortable in winter. 3) Neutral SET^* was 24.4℃ in winter, 27.1℃ in spring and 31.8℃ in summer in the narrow alleys. The comfort range of the narrow alleys was wider than those of other streets. 4) The ratio of window opening was the highest and increased most steeply with temperature for houses facing narrow alleys. Residents preferred to introduce outdoor air into their homes because they felt that it was thermally comfortable. The findings reveal the possibility that narrow alleys moderate urban warming and make the area comfortable.