| Summary: | 碩士 === 國立臺北科技大學 === 建築系建築與都市設計碩士班 === 106 === City high-density development, it caused a rise in metropolitan area temperatures, large energy loss. Urban heat island situation worsens and bring about negative effects on economic and social aspects. To increase the green area in the limited land resources, the green space has evolved from the flat to three-dimensional.The study corresponding solution is based on a 10×10 configuration model for building metrology in a concept city and used ANSYS Fluent v18 for computational fluid dynamics numerical simulation.The urban area is divided into 6 communities by the streets are located in an urban area and the airflow into the city, using 2 building heights, 3 types of green facade coverage rate, and 3 types of relationship between facade greening and wind direction. A total of 10 groups of programs was analyzed to the impact of outdoor pedestrian environment comfort with vertical greening for building in urban areas.
The results show that the heat accumulation in the low-rise building urban area is concentrated in the middle zone. The cooling effect becomes better in the center of the street parallel to the wind direction as the green coverage rate increase. The high temperature phenomenon may occur on the windward side of the buildings in the peripheral blocks. The heat accumulation phenomenon in a high-rise buildings urban area is concentrated in downstream regions. The cooling effect becomes better in the streets parallel with the wind direction as the green coverage rate increase. It may cause the temperature to rise behind the buildings in downstream regions. For the two types of building heights, the vertical greening for building in the passages parallel to the wind direction is most effective in enhancing pedestrian comfort in the urban area.
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